TY - JOUR
T1 - Stable and bright formamidinium-based perovskite light-emitting diodes with high energy conversion efficiency
AU - Miao, Yanfeng
AU - Ke, You
AU - Wang, Nana
AU - Zou, Wei
AU - Xu, Mengmeng
AU - Cao, Yu
AU - Sun, Yan
AU - Yang, Rong
AU - Wang, Ying
AU - Tong, Yunfang
AU - Xu, Wenjie
AU - Zhang, Liangdong
AU - Li, Renzhi
AU - Li, Jing
AU - He, Haiping
AU - Jin, Yizheng
AU - Gao, Feng
AU - Huang, Wei
AU - Wang, Jianpu
N1 - Publisher Copyright:
© 2019, The Author(s).
PY - 2019/12/1
Y1 - 2019/12/1
N2 - Solution-processable perovskites show highly emissive and good charge transport, making them attractive for low-cost light-emitting diodes (LEDs) with high energy conversion efficiencies. Despite recent advances in device efficiency, the stability of perovskite LEDs is still a major obstacle. Here, we demonstrate stable and bright perovskite LEDs with high energy conversion efficiencies by optimizing formamidinium lead iodide films. Our LEDs show an energy conversion efficiency of 10.7%, and an external quantum efficiency of 14.2% without outcoupling enhancement through controlling the concentration of the precursor solutions. The device shows low efficiency droop, i.e. 8.3% energy conversion efficiency and 14.0% external quantum efficiency at a current density of 300 mA cm−2, making the device more efficient than state-of-the-art organic and quantum-dot LEDs at high current densities. Furthermore, the half-lifetime of device with benzylamine treatment is 23.7 hr under a current density of 100 mA cm−2, comparable to the lifetime of near-infrared organic LEDs.
AB - Solution-processable perovskites show highly emissive and good charge transport, making them attractive for low-cost light-emitting diodes (LEDs) with high energy conversion efficiencies. Despite recent advances in device efficiency, the stability of perovskite LEDs is still a major obstacle. Here, we demonstrate stable and bright perovskite LEDs with high energy conversion efficiencies by optimizing formamidinium lead iodide films. Our LEDs show an energy conversion efficiency of 10.7%, and an external quantum efficiency of 14.2% without outcoupling enhancement through controlling the concentration of the precursor solutions. The device shows low efficiency droop, i.e. 8.3% energy conversion efficiency and 14.0% external quantum efficiency at a current density of 300 mA cm−2, making the device more efficient than state-of-the-art organic and quantum-dot LEDs at high current densities. Furthermore, the half-lifetime of device with benzylamine treatment is 23.7 hr under a current density of 100 mA cm−2, comparable to the lifetime of near-infrared organic LEDs.
UR - https://www.scopus.com/pages/publications/85070579380
U2 - 10.1038/s41467-019-11567-1
DO - 10.1038/s41467-019-11567-1
M3 - 文章
C2 - 31399580
AN - SCOPUS:85070579380
SN - 2041-1723
VL - 10
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 3624
ER -