Proton-transfer-induced 3D/2D hybrid perovskites suppress ion migration and reduce luminance overshoot

被引：135

作者：

Kim, Hobeom ^{[1
]}

Kim, Joo Sung ^{[1
]}

Heo, Jung-Min ^{[1
]}

Pei, Mingyuan ^{[2
]}

Park, In-Hyeok ^{[3
]}

Liu, Zhun ^{[4
,5
]}

Yun, Hyung Joong ^{[6
]}

Park, Min-Ho ^{[1
]}

Jeong, Su-Hun ^{[1
]}

Kim, Young-Hoon ^{[1
]}

Park, Jin-Woo ^{[1
]}

Oveisi, Emad ^{[7
]}

Nagane, Satyawan ^{[8
]}

Sadhanala, Aditya ^{[8
,9
,17
]}

Zhang, Lijun ^{[4
,5
]}

Kweon, Jin Jung ^{[10
]}

Lee, Sung Keun ^{[10
,11
]}

Yang, Hoichang ^{[2
]}

Jang, Hyun Myung ^{[12
]}

Friend, Richard H. ^{[8
]}

Loh, Kian Ping ^{[3
]}

Nazeeruddin, Mohammad Khaja ^{[13
]}

Park, Nam-Gyu ^{[14
]}

Lee, Tae-Woo ^{[1
,15
,16
]}

机构：

[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 08826, South Korea

[2] Inha Univ, Dept Chem Engn, Incheon 22212, South Korea

[3] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore

[4] Jilin Univ, State Key Lab Integrated Optoelect, Key Lab Automobile Mat MOE, Changchun 130012, Peoples R China

[5] Jilin Univ, Coll Mat Sci & Engn, Changchun 130012, Peoples R China

[6] Korea Basic Sci Inst KBSI, Res Ctr Mat Anal, Daejeon 34133, South Korea

[7] Ecole Polytech Fed Lausanne EPFL, Interdisciplinary Ctr Electron Microscopy CIME, CH-1951 Lausanne, Switzerland

[8] Univ Cambridge, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 OHE, England

[9] Univ Oxford, Dept Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England

[10] Seoul Natl Univ, Sch Earth & Environm Sci, Seoul 08826, South Korea

[11] Seoul Natl Univ, Inst Appl Phys, Seoul 08826, South Korea

[12] Pohang Univ Sci & Technol, Dept Mat Sci & Engn, Pohang 37673, South Korea

[13] Ecole Polytech Fed Lausanne EPFL, Inst Chem Sci & Engn, Grp Mol Engn Funct Mat, CH-1951 Sion, Switzerland

[14] Sungkyunkwan Univ, Dept Mat Sci & Engn, Suwon 16419, South Korea

[15] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 08826, South Korea

[16] Seoul Natl Univ, Res Inst Adv Mat, Nano Syst Inst NSI, Inst Engn Res, Seoul 08826, South Korea

[17] Indian Inst Sci, Ctr Nano Sci & Engn, Bangalore 560012, Karnataka, India

来源：

NATURE COMMUNICATIONS | 2020年 / 11卷 / 01期

基金：

新加坡国家研究基金会; 英国工程与自然科学研究理事会;

关键词：

LIGHT-EMITTING-DIODES; HALIDE PEROVSKITE; SOLAR-CELLS; EFFICIENCY; HYSTERESIS;

D O I：

10.1038/s41467-020-17072-0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页数：13

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