Ionic-liquid induced enhanced performance of perovskite light-emitting diodes

Cai, Jinqiao1; Ali, Muhammad Umair1,2; Liu, Ming1; Zhao, Jiajun1; Miao, Jingsheng1; Deng, Yonghong3; Yang, Shihe4,5; Yan, Chaoyi1; Xing, Guichuan6; He, Yaowu1; Meng, Hong1

2020-09-16

10.1088/1361-6463/ab913a

JOURNAL OF PHYSICS D-APPLIED PHYSICS   影响因子和分区

0022-3727

1361-6463

Organic-inorganic hybrid perovskites (OIHP) have attracted a great deal of attention as promising light-emitting materials, because of their low-cost production via simple solution processing, high color purity, and easily tunable bandgaps. Nevertheless, the fabrication of OIHP films for light-emitting diodes generally requires complicated post-treatments, such as an anti-solvent dripping process, owing to the poor film forming property of the perovskite precursor solution. In this work, we employed an ionic liquid, methylammonium acetate (MAAc), as an additive to optimize the growth of FAPbBr(3)perovskite films via an anti-solvent-free approach. The influence of MAAc on the crystallization kinetics of FAPbBr(3)phase and optoelectronic properties of the resulting perovskite films have been systematically investigated. Our results demonstrate that MAAc is an effective modifier for creating perovskite films with reduced grain size, homogeneous grain distribution, and smooth surface, leading to an enhanced average lifetime of the excitons. Perovskite light-emitting diodes (PeLEDs) containing FAPbBr(3)films obtained via incorporating 10 vol% MAAc as an additive exhibited considerably suppressed leakage current, and a significant enhancement in current efficiency (CE) from 0.027 to 4.85 cd A(-1). These findings reveal that the incorporation of a suitable additive could play a beneficial role in the formation of well-optimized perovskite films, which would ultimately lead to the realization of PeLEDs with improved performance.

perovskite LED ionic liquid

SCI ; EI

英语

其他

Shenzhen Hong Kong Innovation Circle joint R D Project[SGLH20161212101631809] ; China (Shenzhen)-Canada Technology Collaboration Project[GJHZ20180420180725249] ; Shenzhen Science and Technology research grant[JCYJ20170818090312652][JCYJ20170412151139619] ; Shenzhen Peacock Plan[KQTD2014062714543296] ; Shenzhen Engineering Laboratory (Shenzhen Development and Reform Commission)[[2016]1592] ; Guangdong International Science Collaboration Base[2019A050505003] ; Guangdong Key Research Project[2019B010924003] ; China (Shenzhen)-United States Technology Collaboration Project[GJHZ20180928163206500]

Physics

Physics, Applied

WOS:000549389300001

IOP PUBLISHING LTD

20202908954496

Ionic liquids ; Crystallization kinetics ; Light emitting diodes ; Additives ; organic-inorganic materials

Minerals:482.2 ; Semiconductor Devices and Integrated Circuits:714.2 ; Physical Chemistry:801.4 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804

PHYSICS

Web of Science

1.Peking Univ, Shenzhen Grad Sch, Sch Adv Mat, Shenzhen 518055, Peoples R China
2.Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China
3.South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Hong Kong Univ Sci & Technol, Nano Sci & Technol Program, Kowloon, Clear Water Bay, Hong Kong, Peoples R China
5.Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Clear Water Bay, Hong Kong, Peoples R China
6.Univ Macau, Inst Appl Phys & Mat Engn, Joint Key Lab, Minist Educ, Macau 999078, Peoples R China

Cai, Jinqiao,Ali, Muhammad Umair,Liu, Ming,et al. Ionic-liquid induced enhanced performance of perovskite light-emitting diodes[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2020,53(38).

Cai, Jinqiao.,Ali, Muhammad Umair.,Liu, Ming.,Zhao, Jiajun.,Miao, Jingsheng.,...&Meng, Hong.(2020).Ionic-liquid induced enhanced performance of perovskite light-emitting diodes.JOURNAL OF PHYSICS D-APPLIED PHYSICS,53(38).

Cai, Jinqiao,et al."Ionic-liquid induced enhanced performance of perovskite light-emitting diodes".JOURNAL OF PHYSICS D-APPLIED PHYSICS 53.38(2020).