Pure Formamidinium-Based Perovskite Light-Emitting Diodes with High Efficiency and Low Driving Voltage.

Meng, Lei; Yao, En-Ping; Hong, Ziruo; Chen, Huajun; Sun, Pengyu; Yang, Zhanlue; Li, Gang; Yang, Yang · Adv Mater · 2017

basic_science · Level V

Where this comes from

Abstract

A formamidinium(FA)-based perovskite showns superior optoelectronic properties including better stability than methylammonium-based counterparts. Pure FA-perovskite-based light-emitting diodes (LEDs) with high efficiency are reported. Interestingly, the LED clearly shows a sub-bandgap emission at 1.7 V (bandgap 2.3 eV). This important discovery provides further insights of the charge transport mechanism in perovskite-based optoelectronic devices.