Enhanced Performance of Red Perovskite Light-Emitting Diodes through the Dimensional Tailoring of Perovskite Multiple Quantum Wells

被引：108

作者：

Chang, Jin ^{[1
,2
]}

Zhang, Shuting ^{[1
,2
]}

Wang, Nana ^{[1
,2
]}

Sun, Yan ^{[1
,2
]}

Wei, Yingqiang ^{[1
,2
]}

Li, Renzhi ^{[1
,2
]}

Yi, Chang ^{[1
,2
]}

Wang, Jianpu ^{[1
,2
]}

Huang, Wei ^{[1
,2
,3
]}

机构：

[1] Nanjing Tech Univ NanjingTech, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, KLOFE, 30 South Puzhu Rd, Nanjing 211816, Jiangsu, Peoples R China

[2] Nanjing Tech Univ NanjingTech, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, IAM, 30 South Puzhu Rd, Nanjing 211816, Jiangsu, Peoples R China

[3] Northwestern Polytech Univ, SIFE, 127 West Youyi Rd, Xian 710072, Shaanxi, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2018年 / 9卷 / 04期

基金：

中国国家自然科学基金;

关键词：

INDUCED PHASE SEGREGATION; HALIDE-PEROVSKITE; HYBRID PEROVSKITES; EFFICIENT; FILMS; ELECTROLUMINESCENCE; DEVICES;

D O I：

10.1021/acs.jpclett.7b03417

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Halide perovskite multiple quantum wells (MQWs) have recently shown great potential in the field of light-emitting diodes. We report a facile solution-based approach to fabricate dimensionality-tunable perovskite MQWs by introducing 1-naphthylmethyl-ammonium (NMA) cations into CsPbI3 perovskites. Through the dimensional tailoring of (NMA)(2)Csn-1PbnI3n+1, perovskite MQWs, the crystallinity and photoluminescence quantum efficiencies (PLQEs) are significantly improved. We have obtained high-performance red perovskite light-emitting diodes (PeLEDs) with a luminance of 732 cd m(-2) and a maximum external quantum efficiency of 7.3%, which are among the best-performing red PeLEDs. Significantly, the maximum luminance of our PeLEDs is obtained at a low applied voltage of 3.4 V, with a turn -on voltage close to the perovskite band gap (Vturn-on approximate to 1.9 V). These outstanding performance characteristics demonstrate that dimensional tailoring of perovskite MQWs is a feasible and effective strategy to achieve high-performance PeLEDs, which is attractive for full-color display applications of perovskites.

引用

页码：881 / 886

页数：6

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