Manipulating Ion Migration for Highly Stable Light-Emitting Diodes with Single-Crystalline Organometal Halide Perovskite Microplatelets,ACS Nano

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Manipulating Ion Migration for Highly Stable Light-Emitting Diodes with Single-Crystalline Organometal Halide Perovskite Microplatelets
ACS Nano ( IF 15.8 ) Pub Date : 2017-05-17 00:00:00 , DOI: 10.1021/acsnano.7b02629
Mingming Chen _{1,

2} , Xin Shan ₁ , Thomas Geske _{1,

3} , Junqiang Li ₁ , Zhibin Yu _{1,

3}

Affiliation

Ion migration has been commonly observed as a detrimental phenomenon in organometal halide perovskite semiconductors, causing the measurement hysteresis in solar cells and ultrashort operation lifetimes in light-emitting diodes. In this work, ion migration is utilized for the formation of a p-i-n junction at ambient temperature in single-crystalline organometal halide perovskites. The junction is subsequently stabilized by quenching the ionic movement at a low temperature. Such a strategy of manipulating the ion migration has led to efficient single-crystalline light-emitting diodes that emit 2.3 eV photons starting at 1.8 V and sustain a continuous operation for 54 h at ∼5000 cd m^–2 without degradation of brightness. In addition, a whispering-gallery-mode cavity and exciton–exciton interaction in the perovskite microplatelets have both been observed that can be potentially useful for achieving electrically driven laser diodes based on single-crystalline organometal halide perovskite semiconductors.

中文翻译：

用单晶有机金属卤化物钙钛矿微片操纵离子迁移的高稳定度发光二极管。

通常已经观察到离子迁移是有机金属卤化物钙钛矿半导体中的有害现象，导致太阳能电池中的测量滞后现象以及发光二极管的超短工作寿命。在这项工作中，利用离子迁移在环境温度下在单晶有机金属卤化物钙钛矿中形成pin结。随后通过在低温下猝灭离子运动来稳定连接。这种控制离子迁移的策略导致了高效的单晶发光二极管，该二极管从1.8 V开始发射2.3 eV光子，并在〜5000 cd m ^{–2的条件下}连续运行54 h。亮度不会降低。此外，钙钛矿微片中的回音壁模式腔和激子-激子相互作用都已被观察到，这对于实现基于单晶有机金属卤化物钙钛矿半导体的电驱动激光二极管而言可能是有用的。

更新日期：2017-05-23

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