P‐106: Highly Luminescent Blue Light‐Emitting Diodes Based on Quasi‐2D Multi‐Cation Perovskites. Issue 1 (25th September 2020)

• Record Type: Journal Article
• Authors: Wu, Yongwei; Feng, Zhengyu; Yang, Guang; Jiang, Pei; He, Bo; Duan, Miao; Yin, Yongming; Chen, Shujhih; Li, Dongze; Zhou, Hang; Zhang, Xin; Zhang, Shengdong
• Is Part Of: Digest of technical papers. Volume 51:Issue 1(2020)
• Page Start: 1752
• Page End: 1754
• Publication Date: 2020-09-25
• Subjects: Perovskite Light‐Emitting Diodes (PeLEDs) -- Blue Emission -- Quasi‐2D -- Multi‐Cation -- High Luminescence; Information display systems -- Congresses; 621.3815422
• DOI: 10.1002/sdtp.14240
• Languages: English
• ISSNs: 0097-966X

Abstract

Abstract : Quasi‐2D perovskites, typically with a standard formula of L2 An‐1 Mn X3n+1, have recently attracted significant attention due to their promising optoelectronic properties. Normally, they contain a mono cation (e.g., butylammonium (BA + ) or phenylethylammonium (PEA + ) for "L" and methylammonium (MA + ) or formamidinium (FA + ) for "A"). In this work, multiple cation‐substitution strategy was used to improve the luminescence and emission efficiency of perovskite thin films. As a result, a smooth, compact surface morphology of blue emission perovskite thin films was achieved, with a high photoluminescence quantum yield of 53%. Finally, the corresponding perovskite light‐emitting diodes (PeLEDs) reaches a brightness of 220 cd/m 2, and a maximum external quantum efficiency of 0.83%.