Proton-transfer-induced 3D/2D hybrid perovskites suppress ion migration and reduce luminance overshoot
- Authors
- Kim, Hobeom; Kim, Joo Sung; Heo, Jung-Min; Pei, Mingyuan; Park, In-Hyeok; Liu, Zhun; Yun, Hyung Joong; Park, Min-Ho; Jeong, Su-Hun; Kim, Young-Hoon; Park, Jin-Woo; Oveisi, Emad; Nagane, Satyawan; Sadhanala, Aditya; Zhang, Lijun; Kweon, Jin Jung; Lee, Sung Keun; Yang, Hoichang; Jang, Hyun Myung; Friend, Richard H.; Loh, Kian Ping; Nazeeruddin, Mohammad Khaja; Park, Nam-Gyu; Lee, Tae-Woo
- Issue Date
- Jul-2020
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- NATURE COMMUNICATIONS, v.11, no.1
- Journal Title
- NATURE COMMUNICATIONS
- Volume
- 11
- Number
- 1
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/40931
- DOI
- 10.1038/s41467-020-17072-0
- ISSN
- 2041-1723
- Abstract
- Perovskite light-emitting diodes (PeLEDs) based on three-dimensional (3D) polycrystalline perovskites suffer from ion migration, which causes overshoot of luminance over time during operation and reduces its operational lifetime. Here, we demonstrate 3D/2D hybrid PeLEDs with extremely reduced luminance overshoot and 21 times longer operational lifetime than 3D PeLEDs. The luminance overshoot ratio of 3D/2D hybrid PeLED is only 7.4% which is greatly lower than that of 3D PeLED (150.4%). The 3D/2D hybrid perovskite is obtained by adding a small amount of neutral benzylamine to methylammonium lead bromide, which induces a proton transfer from methylammonium to benzylamine and enables crystallization of 2D perovskite without destroying the 3D phase. Benzylammonium in the perovskite lattice suppresses formation of deep-trap states and ion migration, thereby enhances both operating stability and luminous efficiency based on its retardation effect in reorientation.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > ETC > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.