Type II GaSb/GaAs quantum dot/ring stacks with extended photoresponse for efficient solar cells

مقال فى مجلة
Anthony, Carrington, Peter ; Mahajumi, Abu Syed ; Wagener, Magnus C. ; Botha, Johannes Reinhardt ; Zhuang, Qiandong ; Krier, . 2011
نوع عمل المنشور
PhD
وسوم
(Quantum Dots), (Quatum Rings), (Solar Cells)
رقم الانشاء
10
رقم المجلد
407
الصفحات
1493–1496
ملخص المنشورات

We report on the fabrication of GaAs based p–i–n solar cells containing 5 and 10 layers of type II GaSb quantum rings grown by molecular beam epitaxy. Solar cells containing quantum rings show improved efficiency at longer wavelengths into the near-IR extending up to 1500 nm and show enhanced short-circuit current under 1 sun illumination compared to a GaAs control cell. A reduction in the open-circuit voltage is observed due to the build-up of internal strain. The MBE growth, formation and photoluminescence of single and stacked layers of GaSb/GaAs quantum rings are also presented.