Efficient metal halide perovskite light-emitting diodes with significantly improved light extraction on nanophotonic substrates

Qianpeng Zhang, Mohammad Mahdi Tavakoli, Leilei Gu, Daquan Zhang, Lei Tang, Yuan Gao, Ji Guo, Yuanjing Lin, Siu Leung, Swapnadeep Poddar, Yu Fu, Zhiyong Fan

Research output: Contribution to journalArticlepeer-review

103 Scopus citations

Abstract

Metal halide perovskite has emerged as a promising material for light-emitting diodes. In the past, the performance of devices has been improved mainly by optimizing the active and charge injection layers. However, the large refractive index difference among different materials limits the overall light extraction. Herein, we fabricate efficient methylammonium lead bromide light-emitting diodes on nanophotonic substrates with an optimal device external quantum efficiency of 17.5% which is around twice of the record for the planar device based on this material system. Furthermore, optical modelling shows that a high light extraction efficiency of 73.6% can be achieved as a result of a two-step light extraction process involving nanodome light couplers and nanowire optical antennas on the nanophotonic substrate. These results suggest that utilization of nanophotonic structures can be an effective approach to achieve high performance perovskite light-emitting diodes.
Original languageEnglish (US)
JournalNature Communications
Volume10
Issue number1
DOIs
StatePublished - Feb 13 2019

Fingerprint

Dive into the research topics of 'Efficient metal halide perovskite light-emitting diodes with significantly improved light extraction on nanophotonic substrates'. Together they form a unique fingerprint.

Cite this