Efficient white light-emitting diodes based on all-perovskite triple-junction tandems

Journal Article

2026

Published in: https://doi.org/10.1038/s41566-026-01870-x

Abstract: Triple-junction tandem light-emitting diodes (LEDs) with simultaneous red, green and blue emission are ideal back-lights for next-generation ultrahigh-definition displays. Although metal halide provost’s are promising candidates for such devices, the solution processing of multilayer stacks remains a fundamental challenge, leading to pronounced efficiency losses in all-perovskite tandem LEDs. Here we present a manufacturing-compatible transfer-printing approach for monolithic integration. We first identify that performance degradation during conventional transfer printing stems from strong interfacial adhesion. To overcome this, we engineer a damage-free transfer process using a temperature-triggered ‘solid–liquid’-switchable interface. This interface, formed via methylamine-assisted transient liquefaction, minimises interfacial stress and facilitates surface regression. We also design an interconnecting layer stack that incorporates interfacial dipoles and tunnelling injection, reducing the global voltage loss to only ~0.5 V compared with all single-junction counterparts. We demonstrate a triple-junction all-perovskite white LED with an ultrawide colour gamut covering 143% of the NTSC standard, a maximum luminance exceeding 67,000 cd m−2 and a certified external quantum efficiency of 16.4%. A proof-of-concept 2.0 × 2.0 cm2 display prototype on both rigid and flexible substrates further underscores the scalability of our strategy for perovskite displays.

• Publisher Name: Nature Publishing Group UK London
• Magazine \ Newspaper: Nature Photonics
• Pages: 46031