Idriss Bedja, Ph.D.

Associate Professor

Optometry Dept

CRC, College of Applied Medical Sciences

King Saud University

PO Box 10219

Riyadh 11433

Office: +966114693534

Mobile: +966503110316

Email:  bedja@ksu.edu.sa

 

Educational Qualifications

1991- 1996 Ph. D. in Biophysics Universite du Quebec a Trois-Rivieres, Trois-Rivieres,Quebec, Can

1988-1991  MSc in Physics (Physics of Surfaces) Universite Laval, Sainte-Foy, Quebec, Canada

1982-1986  B.Sc. in Physics (Option: Electronics) USTHB, Algiers, Algeria.

Fellowships

1- Algerian Government Scholarship for Master in Physics (1987).

2- The Edward G. Weston (Laureate, 1st) 1994 Summer Fellowship of The Electrochem Society, USA

3-Alexander Von Humboldt Fellowship for postdoctoral position in Germany 1995.

Consultancy

2008-2010, Hiring Committee in King Abdullah Institute for Nanotechnology,

Work History:

2012-present  Associate professor at King Saud University, Department of Optometry.

2001-2012     Assistant professor at King Saud University, Department of Optometry.

2000- 2001   Assistant professor at King Saud University, Department of Biomedical Technology.

1999-2000    Assistant professor at Riyadh College of Technology,

1998-1999   Postdoct at INRS-Energie, Montreal, Quebec,  Canada

1996-1998   Postdoct at Würzburg University, Germany. (under Alexander V.  Humboldt fellowship

Courses Taught:

• Geometrical Optics
• Physical Optics
• Applied Physics
• Optical Medical Instrumentations
• Imaging Instrumentations
• Biostatistics
• Ophtalmic Dispensing Optics
• Etc…

 

Research grants

• PI: in a one year small research group (150,000  SR) from Deanship of scientific research (DSR)  project no. RG-1438-041,  2017
• Co-I: NPST, KSU; Towards all-solid-state dye-sensitized solar cells using Co(II/III) redox couple-based solid polymer electrolytes, 2014
• Co-I: DSR, KSU with Dr Bedja and Dr A. Islam from NIMS, Japan); Dye-sensitized Solar Cells; May’ 2013–May’ 2014 and May’ 2014–May’ 2015.
• CO-I of the National Project for Science and Technology of 1,982,000 SR, “Engineering of  Semiconductor-Sensitized Nano-structured Solar Cells“
• PI: Awarded research grant money of 'SR1.4 million' from 'National Plan for Sci and  Tech', King Saud University, to carry out research on Nanostrcured Organic- Inorganic Solar cell 2010-2012
• CO-I in a one year small research group (150,000  SR) from Deanship of scientific research (DSR) 2014
• PI: Awarded research grant money of 'SR1.4 million' from 'National Plan for Sci and  Tech', King Saud University, to carry out research on Nanostrcured Organic- Inorganic Solar cell 2010-2012
• Young Scientist Laureate (First) from Electrochemical Soc. USA, summer project, 1994 done at Notre Dame Radiation Lab., USA

Synergistic Activities

• Member of International Board Committee of the Sahara Solar Breeder, 2014-present

• Invited talk: Bedja, I., “Nanotechnology and our Energy Challenge: A New Breakthrough in PV Innovation” At The 10th International Congress on Renewable Energy and Environment, March 23-25, 2016, Sousse, Tunisia
• Invited talk: Bedja, I., “Can Nanotechnology Help Meet the Clean Energy Challenge? At The 3rd Asia-Arab Sustainable Energy Forum & the 5th Int. Workshop on SSB, May 6-8, 2013, Hirosaki, Jap
• Invited talk: Bedja, I., “Nanotechnology and our Energy Challenge”, Invited for presentation at  9èmes Journees Scientifiques Et Techniques de Sonatrach, 08 au 10 avril 2013, Centre des Conventions d’Oran, Algérie
• Invited talk: Bedja, I., “Can We address the Clean Energy Challenge with Nanotechnology?" at the Second International Conference on Energy and Sustainable Devleopment, ICESD2013, 19-20 February 2013, Adrar, Algeria
• Invited talk: Bedja, I., Photoelectrochemistry and Photoinduced Absorption Spectroscopy of Sensitiz Solar cells (Case of Pyrite on Metal Oxide Electrodes) " Second  International Workshop on Renewable Energies, ICRE’12, April  15 to 16, 2012, Bejaia, Algeria
• Invited talk: Bedja, I., “Photoelectrochemistry and Photoinduced Absorption Spectroscopy of SSC cells: Case of Pyrite on Metal Oxide Electrodes" at 1st International Conference on “Tap Sun: The Sustainable Future” Hyderabad November 25-26, 2011
• Invited talk: Bedja, I.; Boshloo, G. and Hagfeldt, A." Quantum Dots FeS2-ZnO-Nanorods Solar Cell: Photoelectrochemical Characterization and Mechanistic plenary presentation at the First International Workshop on Renewable Energies, INWOP'10, Feb. 28 to March 2, 2010, El Oued, Algeria
• Serving as a Guest Editor: Advances in OptoElectronics journal for a special issue on “Intelligent Materials for Novel Generation of Solar Cells”,

 

Chapter in a book

Prashant V. Kamat, Idriss Bedja, and K. Vinodgopal,“  Photoinduced Charge Transfer Processes in Semiconductor Heterostructures. Capped vs. Coupled Systems” Book Chapter of Fine Particles Science and Technology, NATO ASI Series, Volume 12, 1996, pp 303-316

 

 

Published Articles:

2560 citations on month of October 2017; h-index 17, by Google Scholars

 

 

In progress 2017
 

1. Dinesh Patil, Manoj Jadhav, Kiran Avhad, Towhid H. Chowdhury, Ashraful Islam, Idriss Bedja, Nagaiyan Sekar, “A new class of triphenylamine based novel sensitizers for DSSC: A comparative study of three different anchoring groups,  To be submitted to Dyes and Pigments, 2017

 

Submitted 2017
 

1. Kiran Avhad, Dinesh Patil, Towhid H. Chowdhury, Islam Ashraful, Idriss Bedja and Nagaiyan Sekar, “Rhodanine-3-acetic acid containing D-π-A push-pull chromophores: Effect of a donor towards the understanding of dye-sensitized solar cell performance”,  submitted Sustainable Energy & Fuels, 2017

 

Published 2017

--------------------------------------------------------------------------------------------------------------

 

1. Narra Vamsi Krishna†‡, Jonnadula Venkata Suman Krishna†‡, Surya Prakash Singh†‡, Lingamallu Giribabu*†‡, Ashraful Islam*§, Idriss Bedja , “Bulky Nature Phenanthroimidazole based Porphyrin Sensitizers for Dye-Sensitized Solar Cell Applications“, Accepted  in The Journal of Physical Chemistry C, 2017, DOI: 10.1021/acs.jpcc.7b07692 • Publication Date (Web): 26 Oct 2017

1. Ashraful Islam, Towhid H. Chowdhury , Chuanjiang Qin, Liyuan Han, Jae-Joon Lee , Idriss M. Bedja, Md. Akhtaruzzaman, Kamaruzzaman Sopian, Antoine Mirloup and Nicolas Leclerc, “Panchromatic Absorption of Dye Sensitized Solar Cells by Co-Sensitization of Triple Organic Dyes “, Accepted in Sustainable Energy & Fuels, DOI: 10.1039/c7se00362e,  2017

1. Ravindra Kumar Gupta and Idriss Bedja, “Cationic effect on dye-sensitized solar cell properties using electrochemical impedance and transient absorption spectroscopies techniques”,  J. Phys. D: Appl. Phys., at press: https://doi.org/10.1088/1361-6463/aa6fa3

1.  Idriss Bedja and Ravindra Kumar Gupta, “ Effects of silicon-nanoparticles in suppression of electron recombination in TiO2 based dye-sensitized solar cell”, online, tenderfoot Publications, Sci.& Tech., March 2017

1. Narra Vamsi Krishna,  Jonnadula Venkata Suman Krishna,  Surya Prakash Singh, Lingamallu Giribabu,  Liyuan Han, Idriss Bedja, Ashraful Islam “Donor-π-Acceptor Based Stable Porphyrin Sensitizers for Dye-Sensitized Solar Cells: Effect of π-Conjugated Spacers”, J. Phys. Chem. C, 2017, 121 (12), pp 6464–6477

1. Ryuji Kaneko; Guohua Wu; Kosuke Sugawa; Joe Otsuki; Ashraful Islam; Liyuan Han; Idriss Bedja; Ravindra K Gupta, “Cyclometalated Ruthenium Complexes with 6-(ortho-Methoxyphenyl)-2,2'-Bipyridine as Panchromatic Dyes for Dye-Sensitized Solar Cells” Journal of Organometallic Chemistry 833 (2017) 61e70

1. Guohua Wu,a Ryuji Kaneko,a Ashraful Islam,*b Idriss Bedja,c Ravindra Kumar Gupta,c Liyuan Hanb and Joe Otsuki , “Effect of different auxiliary ligands and anchoring ligands on neutral thiocyanate-free ruthenium(II) dyes bearing tetrazole chromophores for dye-sensitized solar cells”, Dyes and Pigments 140 (2017) 354-362
2. Lingamallu Giribabu, Naresh Duvva, Seelam Prasanthkumar, Surya Prakash Singh, Liyuan Han, Idriss Bedja, Ravindra Kumar Gupta, Ashraful Islam, “Effect of spacer and anchoring group of tetrathiafulvalene based sensitizers on the performance of dye sensitized solar cells” Sustainable Energy Fuels, 2017,1, 345-353
3. Lingamallu Giribabu, Tejaswi Jella, srikanth, yarasi, Surya Prakash Singh, Singh, Ashraful Islam, Liyuan Han, Idriss M Bedja, Ravindra Kumar Gupta, “ Heteroleptic Ru(II) cyclometalated complexes derived from benzimidazole-phenyl carbene ligands for dye-sensitized solar cells: experimental and theoretical approach” Mater. Chem. Front., 2017, 1, 947-957

Published 2016
 

1. Ganesh Koyyada, Surya Prakash Singh, K. Bhanuprakash, Liyuan Han, Idriss M. Bedja, Ravindra Kumar Gupta, Ashraful Islam, and M. Chandrasekharam, “Study of Donor–Acceptor–p–Acceptor Architecture Sensitizers with Benzothiazole Acceptor for Dye-Sensitized Solar Cells “, Energy Technol. 2016, 4, 458 – 468

1. I. Bedja, “NANOTECHNOLOGY AND OUR CLEAN ENERGY CHALLENGE: A NEW BREAKTHROUGH IN PV INNOVATION”, Proceedings, Xth International Congress on Renewable Energy and the Environment, 23-25March 2016, Tunisia

1. I. Bedja, “FeS2-quantum dots-and dye-sensitized SnO2 solar cells: Photovoltaic performance and dynamic comparative studies” Journal of Optoelectronics and Biomedical Materials Vol. 8, No.4, October - December 2016 p. 147 - 153                                              

1. Guohua Wu, Ryuji Kaneko, Ashraful Islam, Yaohong Zhang, Kosuke Sugawa, Liyuan Han, Qing Shen, Idriss Bedja, Ravindra Kumar Gupta, Joe Otsuki “Thiocyanate-free asymmetric ruthenium(II) dye sensitizers containing azole chromophores with near-IR light-harvesting capacity” Journal of Power Sources 331, 100-111, 2016

1. Hamid M. Ghaithan, Saif M. H Qaid, Mahmoud Hezam, Joselito P. Labis, A. S. Aldwayyan, Idriss M. Bedja “Laser induced photocurrent and photovoltage transient measurements of dye-sensitized solar cells based on TiO2 nanosheets and TiO2 nanoparticles” Electrochimica Acta , DOI: 10.1016/j.electacta.2016.07.021,  2016.

1. Lingamallu Giribabu, Naresh Duvva, Surya Prakash Singh, Liyuan Han, Idriss M. Bedja, Ravindra Kumar Gupta, Ashraful Islam “Stable and charge recombination minimized π-extended thioalkyl substituted tetrathiafulvalene sensitized dye-sensitized solar cells” submitted to Materials Chemistry Frontiers, DOI: 10.1039/C6QM00070C
   
   Received 30 May 2016, Accepted 13 Jul 2016, First published online 15 Aug 2016

1. G. Hanumantha Rao, A. Venkateswararao,   L. Giribabu,  Liyuan Han,  Idriss Bedja,   Ravindra Kumar Gupta,  Ashraful Islam and   Surya Prakash Singh “Near-infrared squaraine co-sensitizer for high-efficiency dye-sensitized solar cells” Phys. Chem. Chem. Phys., 2016, Advance Article, DOI: 10.1039/C6CP01669C , Accepted 18 Apr 2016

 

 

19-   Guohua Wu, Ryuji Kaneko, Yaohong Zhang, Yoshinao Shinozaki, Kosuke Sugawa, Ashraful Islam, Liyuan Han, Idriss Bedja, Ravindra Kumar Gupta, Qing Shen, Joe Otsuki “Neutral and anionic tetrazole-based ligands in designing novel ruthenium dyes for dye-sensitized solar cells” Journal of Power Sources Volume 307, 1 March 2016, Pages 416–425,  doi:10.1016/j.jpowsour.2015.12.135;

 

1. Ashraful Islam, Md. Akhtaruzzaman, Idriss M. Bedja, Liyuan Han, Antoine Mirloup, Raymond Ziessel, “Dye-Sensitized solar cells: Sensitized with triple dyes in ultraviolet to near infrared”ICDRET 2016, on January 7-9, 2016,IEEE Explore DOI:  10.1109/ICDRET. 2016.7421493

 

21-   Towhid H. Chowdhury, Ashraful Islam,  Arunakumari M., Surya Prakash Singh,   Md. Khorshed Alam, Idriss M. Bedja, Seunghyup Yoo, Mohd Asri Mat Teridi,a Kamaruzzaman Sopian, Nowshad Amin,  Abd. Rashid bin Mohd Yusoff  and Md. Akhtaruzzaman “Prospects of Graphene as a Potential Carrier Transport Material in Third Generation Solar Cells” THE CHEMICAL RECORD · JANUARY 2016, DOI: 10.1002/tcr.201500206, p614-632, 2016

 

22-   Saif M.H. Qaid , Mohammed. S. Al Sobaie, M.A. Majeed Khan, Idriss M. Bedja, Fahhad. H. Alharbi, Mohammad Khaja Nazeeruddin, Abdullah S. Aldwayyan “ Band-gap tuning of lead halide perovskite using a single step spin-coating deposition process”, Materials Letters 164 (2016) 498–501

 

23- Ashraful Islam1, Md. Akhtaruzzaman, Towhid H. Chowdhury, Chuanjiang Qin, Liyuan Han, Idriss M. Bedja, Romain Stalder, Kirk S. Schanze  and John R. Reynolds, “Enhanced Photovoltaic Performances of Dye Sensitized Solar Cells by Co-Sensitization of Benzothiadiazole and Squaraine Based Dyes”  ACS Applied Materials & Interfaces, 2016, DOI: 10.1021/acsami.5b11134

 
Published 2015
 

1. Hamid M. Ghaithan ; Saif M. Qaid ; Mahmoud Hezam ; Muhemmad B. Siddique ; Idriss M. Bedja ; Abdullah S. Aldwayyana “Invoking the frequency dependence in square modulated light intensity techniques for the measurement of electron time constants in dye- sensitized solar cells” Proc. SPIE 9556, Conference on Nanoengineering - Fabrication, Properties, Optics, and Devices XII Location: San Diego, CADate: AUG 11-12, 2015 Sponsor(s): SPIE NANOENGINEERING: FABRICATION, PROPERTIES, OPTICS, AND DEVICES XII   Book Series: Proceedings of SPIE   Volume: 9556     Article Number: 955604   Published: 2015

1. T. Swetha, S. Niveditha, K. Bhanuprakash, A. Islam, L. Han, I. Bedja, R. Fallahpour, S. P. Singh “New Heteroleptic Benzimidazole Functionalized Ru-Sensitizer Showing Highest Efficiency for Dye-Sensitized Solar Cells”, Inorg. Chem. Commun. 51 (2015) 61.

Published 2014
 

1. H. Cheema,   A. Islam,   R. Younts,   B. Gautam,   I. Bedja,   R. K. Gupta, L. Han, K. Gundogdu, A. El-Shafei, “More stable and more efficient alternatives of Z-907: carbazole-based amphiphilic Ru(II) sensitizers for dye-sensitized solar cells”, Phys. Chem. Chem. Phys.16 (2014) cited: 5

1.  S. Chowdhury, U. Sumita, A. Islam and I. Bedja “ Importance of policy for energy system transformation: Diffusion of PV   technology in Japan and Germany”, Energy Policy, 2014, 68, 285. Cited 12

1. R. K. Gupta, I. M. Bedja “Improved cell efficiency of [poly(ethylene oxide)-succinonitrile]/ LiI-I2 solid polymer electrolyte-based dye-sensitized solar cell”., Phys. Status Solidi A 211 (2014) 1601.

1. M. Hussain, A. Islam, I. Bedja, R. K. Gupta, L. Han, A. El-Shafei “A Comparative Study of Ru (II) Cyclometallated Versus Thiocyanated Heteroleptic Complexes: Thermodynamic Force for Efficient Dye Regeneration in Dye-sensitized Solar Cells and How Low Could it Be?”, Phys. Chem. Chem. Phys.16 (2014) 14874. Cited 7

Published 2013 and before
 

1. Gupta, R. K., Bedja, I.  and Aldwayyan, A. S, “Improved performance of silicon nanoparticles film coated dye sensitized solar cell”  Phys. Status solidi (RRL) - Rapid Res. Lett. 6,  424, 2012
2. Bedja, I. “FeS2 Quantum Dots Sensitized Nanostructured TiO2 Solar Cell: Photoelectro-chemical and Photoinduced Absorption Spectroscopy Studies”, Materials Science-Poland, Vol.(29), No (3), pages 171-176, 2012
3. Bedja, I. “CdS Sensitized ZnO-Nanorod Photoelectrodes: Photoelectrochemistry and Photoinduced Absorption  Spectroscopy”  Advances in Optoelectronics, Vol2011, Article ID 915123, 5 pages
4. Bedja, I. and Hagfeldt, A. “Comparative Study between Dye-sensitized and CdS-Quantum Dots-sensitized TiO2 Solar Cells using Photoinduced Absorption Spectroscopy”, Advances in Optoelectronics, Volume 2011, Article ID 424071, 5 pages, doi:10.1155/2011/424071
5. Bedja, I. and Hagfeldt, A. “FeS2-Quantum-dot Sensitized Metal Oxide Photoelectrodes: Photoelectro-chemistry and Photoinduced Absorption Spectroscopy” Advances in Optoelectronics,Volume 2011, Article ID 824927, 6 pages doi:10.1155/2011/824927 cited3
6. Bedja, I. “FeS2 Quantum Dots Sensitized Nanostructured SnO2 Solar Cell: Photoelectrochemical and Photoinduced Absorption Spectroscopy Studies”, Egypt. J. Solids, Vol. 33, No. 1, 2010) p-19
7. Bedja, I. “Photoinduced Absorption Spectroscopy as a Tool in the Study of Electron Injection and Recombination in CdS QD Sensitized ZnO Solar Cell” Egypt. J. Solids, Vol. 33, 2, 2010 p-201
8. Santerre, F; Bedja, I; Dodelet, JP, et al Hole transport molecules in high T-g polymers: Their effect on the performance of organicLight emitting diodes Chemistry of Materials Volume: 13   Issue: 5   Pages: 1739-1745   Published: MAY 2001Times Cited: 18
9. Czekelius, C; Hilgendorff, M; Spanhel, L, Bedja, I et al.” A simple colloidal route to nanocrystalline ZnO/CuInS2 bilayer” Advanced Materials   Volume: 11   Issue: 8   Pages: 643- Published: 1999 cited 107
10. Bedja, I; Hotchandani, S; Kamat, PV “Photosensitization of composite metal oxide semiconductor films “ Berichte Der Bunsen-Gesellschaft-Physical Chemistry Chemical Physics   Vol: 101   Issue: 11   Pages: 1651-1653   Published: NOV 1997 
11. Bedja, I; Kamat, PV; Hua, X, et al “Photosensitization of nanocrystalline ZnO films by bis(2,2'-bipyridine)(2,2'-bipyridine-4,4'-dicarboxylic acid)ruthenium(II)”  LANGMUIR   Volume: 13   Issue: 8   Pages: 2398-2403   Published: APR 16 1997 cited 151
12. Bedja, I; Kamat, PV; Hotchandani, S “Fluorescence and photoelectrochemical behavior of chlorophyll a adsorbed on a  nanocrystalline SnO2 film “Journal Of Applied Physics   Volume: 80   Issue: 8   Pages: 4637-4643    1996 , cited 39
13. Vinodgopal, K; Bedja, I; Kamat, PV  “Nanostructured semiconductor films for photocatalysis. Photoelectrochemical behavior of SnO2/TiO2 composite systems and its role in photocatalytic degradation of a textile azo dye” Chemistry Of Materials   Vol: 8   Issue: 8   Pages: 2180-2187    1996, cited 351
14. Kamat, PV; Bedja, I; Nasr, C, et al.”Revealing the mysteries of nanocrystalline semiconductor thin film based photoelectrochemical solar cells.”Abstracts Of Papers Of The American Chemical Society   Volume: 211   Pages: 137-Phys   Part: 2   Published: Mar 24 1996
15. Kamat, PV; Bedja, I; Hotchandani, S, et al” Photosensitization of nanocrystalline semiconductor films. Modulation of electron transfer between excited ruthenium complex and SnO2 nanocrystallites with an externally applied bias “ Journal Of Physical Chemistry   Volume: 100   Issue: 12   Pages: 4900, 1996 , Article Number: ISSN 0022-3654 Article Number: ISSN 0022-3654  cited 173
16. Bedja, I; Hotchandani, S; Kamat, PV  “Transient absorption spectroscopy of nanostructured semiconductor films at controlled potentials. An in situ spectroelectrochemical investigation of the photosensitization process “Journal Of Electroanalytical Chemistry   Volume: 401   Issue: 1-2   Pages: 237-241   Published: JAN 24 1996 cited 8
17. Vinodgopal, K; Bedja, I; Kamat, Pv “Degradation Of Textile Azo-Dye By Electrochemically Assisted Photocatalysis “ Abstracts Of Papers Of The American Chemical Society   Volume: 210   Pages: 150-ENVR   Part: 1   Published: AUG 20 1995
18. Das, S; Thomas, Kg; Thomas, Kj, Bedja, I et al “Crown-Ether Derivatives Of Squaraine - New Near-Infrared-Absorbing, Redox-Active Fluoroionophores For Alkali-Metal Recognition” Analytical Proceedings   Volume: 32   Issue: 6   Pages: 213-215    1995
19. BEDJA, I; KAMAT, PV “Capped Semiconductor Colloids - Synthesis And Photoelectrochemical Behavior Of Tio2-Capped Sno2 Nanocrystallites”  Journal Of Physical Chemistry   Volume: 99   Issue: 22   Pages: 9182-9188   Published: JUN 1 1995 cited 309
20. Kamat, Pv; Bedja, I; Hotchandani, S “Photoinduced Charge-Transfer Between Carbon And Semiconductor Clusters - One-Electron Reduction Of C-60 In Colloidal Tio2 Semiconductor Suspensions : Journal Of Physical Chemistry   Volume: 98   Issue: 37   Pages: 9137-9142    15 1994 
21. Bedja, I; Hotchandani, S; Carpentier, R, et al “Electrochromic And Photoelectrochemical Behavior Of Thin Wo3 Films Prepared From Quantized Colloidal Particles “ Thin Solid Films   Volume: 247   Issue: 2   Pages: 195-200    1994  cited 48
22. Vinodgopal, K; Bedja, I; Hotchandani, S, et al. “A Photocatalytic Approach For The Reductive Decolorization Of Textile Azo Dyes In Colloidal Semiconductor Suspensions Langmuir   Volume: 10   Issue: 6   Pages: 1767-1771    1994  cited 144
23. Bedja, I; Hotchandani, S; Carpentier, R, et al “Chlorophyll-B-Modified Nanocrystalline Sno2 Semiconductor Thin-Film As A Photosensitive Electrode Journal Of Applied Physics   Volume: 75   Issue: 10   Pages: 5444-5446   Part: 1   Published: MAY 15  cited 57
24. Bedja, I; Hotchandani, S; Kamat, PV “Preparation And Photoelectrochemical Characterization Of Thin SnO2 Nanocrystalline Semiconductor-Films And Their Sensitization With Bis(2,2'-Bipyridine)(2,2'-Bipyridine-4,4'-Dicarboxylic Acid)Ruthenium(Ii) Complex  : Journal Of Physical Chemistry   Volume: 98   Issue: 15   Pages: 4133-4140, 1994  cited 315
25. Bedja, I; Hotchandani, S; Kamat, PV “Naked And Surface-Modified Thin SnO2 Semiconductor Colloid Films For The Photoelectrochemical Conversion Of Light Energy Abstracts Of Papers Of The American Chemical Society   Volume: 207   Pages: 52-BTEC   Part: 2    1994 
26. Hotchandani, S; Bedja, I; Fessenden, Rw, Et Al.Electrochromic And Photoelectrochromic Behavior Of Thin Wo3 Films Prepared From Quantum-Size Colloidal Particles” Langmuir   Volume: 10   Issue: 1   Pages: 17-22   Published: JAN 1994 cited 87
27. Bedja, I; Hotchandani, S; Kamat, Pv  “Photoelectrochemistry Of Quantized Wo3 Colloids - Electron Storage, Electrochromic, And Photoelectrochromic Effects” Journal Of Physical Chemistry   Volume: 100   Issue: 42   Pages: 11064-11070   Published: OCT 21 1993 , cited:  
28. Kamat, Pv;  Bedja, I; Hotchandani, S., “Photoinduced Charge Transfer Between Fullerenes And TiO2 Semiconductor Colloids” Recent Advances In The Chemistry And Physics Of Fullerenes And Related Materials”. Ed. K. M. Kadish And R.S. Ruoff Pennington, New Jersey, The Electrochemical Society. Pages: 964-975  Published: 1994 cited 159

 

 

 

 

Papers Presented At Conferences  (23 Conferences)

1. Bedja, I., “Nanotechnology and our Clean Energy Challenge: A New Breakthrough in PV Innovation” invited as keynote speaker at Xth International Congress on Renewable Energy and the Environment, 23-25 March 2016, Sousse, Tunisia
2. Bedja, I., “Nanotechnology and our Clean Energy Challenge: A New Breakthrough in PV Innovation” invited for presentation at 10ème Edition des Journées Scientifiques et Techniques de Sonatrach (JST 10),  05- 08 october , Oran, Algeria, 2015 
3. H. M. Ghaithan , S. M. Qaid, M. Hezam, M. B. Siddique, I. M. Bedja, A.S Aldwayyan , ”Measurements of electron lifetime and transport time in dye sensitized solar cell by using photovoltage and photocurrent decay” , Hybrid and Organic Photovoltaics Conference (HOPV15), Italy (2015).
4. H. M. Ghaithan , S. M. Qaid, M. Hezam, M. B. Siddique, I. M. Bedja, A.S Aldwayyan , ” Invoking the frequency dependence in square modulated light intensity techniques for the measurement of electron time constants in dye-sensitized solar cells ” SPIE, USA (2015)
5. Bedja, I., “Improved Performance of Silicon Nanoparticles Film Coated Dye-Sensitized Solar Cells”  Oral presentation in the International Conference on Clean Energy 2014, Istanbul, Turkey June 8-12, 2014.
6. Bedja, I., “Can Nanotechnology Help Meet the Clean Energy Challenge? " Invited for presentation at  The 3rd Asia-Arab Sustainable Energy Forum & the 5th Int. Workshop on SSB, May 6-8, 2013, Hirosaki, Japan
7. Bedja, I., “Nanotechnology and our Energy Challenge”, Invited for presentation at  9èmes Journees Scientifiques Et Techniques deSonatrach, 08 au 10 avril 2013, Centre des Conventions d’Oran, Algérie
8. Bedja, I., and Hagfeldt, A., “Comparative Study between Dye-sensitized and CdS-Quantum Dots-sensitized TiO2 Solar Cells using Photoinduced Absorption Spectroscopy presented at the 19th International Conference on the Conversion and Storage of Solar Energy, July 29, Aug 3, 2012, Pasadena, USA,          
9. Bedja, I., “Can We Meet Clean Energy Demand with the Help of Nanotechnology?" Invited for plenary presentation at  the 2nd Asia-Arab Sustainable Energy Forum, Oran - 15 &16 May 2012, Algeria
10. Bedja, I., Photoelectrochemistry and Photoinduced Absorption Spectroscopy of SensitizSolar cells (Case of Pyrite on Metal Oxide Electrodes) " Invited for plenary presentation at the Second  International Workshop on Renewable Energies, ICRE’12, April  15 to 16, 2012, Bejaia, Algeria
11. Bedja, I. Photoelectrochemistry and Photoinduced Absorption Spectroscopy of SSC cells: Case of Pyrite on Metal Oxide Electrodes" invited for plenary presentation at 1st International Conference on “Tap Sun: The Sustainable Future” Hyderabad November 25-26, 2011
12. Bedja, I.; Boshloo, G. and Hagfeldt, A." FeS2-Quantum-dot Coated Metal Oxide Photoelectrodes: Photoelectrochemistry and Photoinduced Absorption Spectroscopy   " Presented at 18th International Conference on Photochemical Conversion and Storage of Solar Energy (IPS-18). Jul 25-30, 2010, Korea
13. Bedja, I.; Boshloo, G. and Hagfeldt, A." Quantum Dots FeS2-ZnO-Nanorods Solar Cell: Photoelectrochemical Characterization and Mechanistic Study" invited for plenary presentation at the First International Workshop on Renewable Energies, INWOP'10, Feb. 28 to March 2, 2010, El Oued, Algeria
14. Bedja, I " Photoinduced Absorption Spectroscopy as Tool in the Study of Electron injection and Recombination in Ru(dcby)2(NCS)2 Sensitized Nanostructured SnO2 based Solar Cell" presented at the first "International Conference for Nanotechnology Industries" Riyadh, Saudi Arabia, 5-7 April 2009
15. Bedja, I " FeS2 Quantum Dots Sensitized Nanostructured SnO2 based Solar Cell: Mechanistic Study using Photoinduced Absorption Spectroscopy" presented at the first "International Conference for Nanotechnology Industries" Riyadh, Saudi Arabia, 5-7 April 2009
16. Bedja, I. and  Anders Hagfeldt " CdS Quantum Dots Sensitized nanostructured TiO2 based Solar Cells: Mechanistic Study using Photoinduced Absorption Spectroscopy" presented at German-Middle East International Conference, Amman/Jordan 10-11 May 2009
17. Joachim Leeb, Michael Hilgendorff, Idriss Bedja, Lubomir Spanhel, Gerd. Müller, V.  Gebhardt and D. Haarer, " Electroluminescence and Photoconductivity of Layered Hybrides Build Up of Nanosized II-VI-Semiconductor Crystallites ", presented at the twelve International Conference of  Photochemical Conversion And Storage of  Solar Energy, August  9-14, 1998, Berlin, Germany.
18. Idriss Bedja, Surat Hotchandani and Prashant V. Kamat, " Photosensitization of  Composite Metal Oxide Semiconductors based Nanocrystalline Films", presented at the 96th Annual Meeting of the Deutsche Bunsen-Gesellschaft für Physikalische Chemie in Darmstadt, May 8th to 10th, 1997
19. Prashant V. Kamat, Idriss Bedja, Surat Hotchandani and K. Vinodgopal, "Modulation of Charge Injection in Nanostructured Semiconductor Thin Films.  An insight into the Mechanism of Photosensitization", presented at the Electrochemical Society Meeting,  October 1995, Chicago, Illinois.
20.  Idriss Bedja, Surat Hotchandani, Di Liu, Richard W. Fessenden and Prashant V. Kamat 

     "Nanocrystalline Semiconductor Thin Films as Novel Electrode Material for  Photoelecrochemical Cells", presented at the Tenth Intemational Conference On Photochemical Conversion And Storage of Solar Energy, July 24-29, 1994, Interlaken, Switzerland.

1. Idriss Bedja, Surat Hotchandani, Robert Carpentier, Richard W. Fessenden and Prashant V.  

Kamat ' Photoelectrochemistry of Chlorophyll b coated on nanocrystalline Sn02 semiconductor films", presented at the Tenth International Conference On Photochemical Conversion And Storage of Solar Energy, July 24-29, 1994, Interlaken, Switzerland.

1. Idriss Bedja, Surat Hotchandani and Prashant V. Kamat, "Naked and Surface-Modified Thin
2. ", presented at American Chemical Society Meeting, March 1994, San Diego, California.
3. Idriss Bedja, Chouhaid Nasr, Surat Hotchandani and Prashant V. Kamat, "Preparation et

Caracterisation des Films Minces a Semiconducteurs Colloidaux Sn02", presented at "62e Congres de l'ACFAS, May 16-20, 1994, Montreal, Quebec, Canada.

1.  Prashant V. Kamat, Di Liu, Idriss Bedja and Surat Hotchandani, "Photoelectrochermical    

          Behavior Of Thin Semiconductors Films", presented at 183rd Electrochemical Society Meeting", May 16-21,1993, Honollulu (Hawai).

25. Idriss Bedja, Surat Hotchandani and Prashant V. Kamat, "Comportement Electrochromique des Films Minces Prepares a partir de Particules Ultra-petites de Semiconducteurs Colldidaux W03", presented at "61e Congres de l'ACFAS, May 17-21, 1993, Rimouski, Quebec, Canada..

26.Idriss Bedja, Surat Hotchandani and Prashant V. Kamat, "Photo- And Electrochromic Behavior And Photoelectrochemistry Of Thin W03 Films Prepared from Ultrasmall Colloidal Semiconductor Particles", presented at Sixth International Conference on Organized Molecular Films, July 4-9, 1993, Trois-Riviems, Qc., Can.

27.  Idriss Bedja, Denis Roy and Alain Adnot, "Etude de la Promotion Electronique des

        Sous-Monocouches de Potassium sur l'Oxydation du Silicium (100) par

        spectroscopies electroniques (AES, XPS)".  presented at "58e Congres de de l'ACFAS,

         May, 1990, Quebec, Quebec, Canada.