Efficient Two-Dimensional Tin Halide Perovskite Light-Emitting Diodes via a Spacer Cation Substitution Strategy

被引：141

作者：

Wang, Zhibin ^{[2
]}

Wang, Fuzhi ^{[2
]}

Zhao, Biao ^{[1
]}

Qu, Songnan ^{[3
]}

Hayat, Tasawar ^{[4
]}

Alsaedi, Ahmed ^{[4
]}

Sui, Laizhi ^{[5
]}

Yuan, Kaijun ^{[5
]}

Zhang, Jianqi ^{[6
]}

Wei, Zhixiang ^{[6
]}

Tan, Zhan'ao ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China

[2] North China Elect Power Univ, State Key Lab Alternate Elect Power Syst Renewabl, Beijing 102206, Peoples R China

[3] Univ Macau, Inst Appl Phys & Mat Engn, Taipa, Macao, Peoples R China

[4] King Abdulaziz Univ, Fac Sci, NAAM Res Grp, Jeddah 21589, Saudi Arabia

[5] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China

[6] Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2020年 / 11卷 / 03期

基金：

中国国家自然科学基金;

关键词：

HIGH-PERFORMANCE;

D O I：

10.1021/acs.jpclett.9b03565

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：

Lead halide perovskites have attracted tremendous attention because of their impressive optoelectronic properties. However, the toxicity of lead remains a bottleneck for further commercial development. Two-dimensional Ruddlesden-Popper tin-based perovskites are lead-free and more stable compared to their three-dimensional counterparts, which have great potential in the optoelectronic device field. Herein, we demonstrate high-quality two-dimensional phenylethylammonium tin-iodide perovskite (PEA(2)SnI(4)) thin films by using toluene as the antisolvent. Furthermore, the PeLED performance is greatly improved by replacing the PEAI spacer cation with 2-thiopheneethyllamine iodide (TEAI). As a result, a TEA-based PeLED device is achieved with a low turn-on voltage of 2.3 V, a maximum luminance of 322 cd m(-2), and maximum external quantum efficiency of 0.62%, which are the highest efficiency and brightness for pure red (emission peak = 638 nm) tin-based PeLEDs to date.

引用

页码：1120 / +

页数：15

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