Sky-blue perovskite light-emitting diodes based on quasi-two-dimensional layered perovskites

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• 作者：Lu Cheng^a ; Yu Cao^a ; Rui Ge^a ; Ying-Qiang Wei^a ; Na-Na Wang^a ; Jian-Pu Wang^a ; ^{iamjpwang@njtech.edu.cn} ; Wei Huang^a ; ^b
• 关键词：Perovskite light-emitting diodes ; Quasi-2D ; Sky-blue emission ; Morphology ; Solution process
• 刊名：Chinese Chemical Letters
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：28
• 期：1
• 页码：29-31
• 全文大小：614 K
• 卷排序：28

文摘

A mixed organic (4-phenylbutylamine, 4-PBA) and inorganic (cesium, Cs) cations are used to deposit quasi-two-dimensional layered perovskites. This layered perovskites exhibit good film coverage as two-dimensional perovskites and high emission performance close to three-dimensional organic–inorganic hybrid perovskites. Light-emitting diodes (LEDs) are fabricated by using solution process based on the quasi-two-dimensional layered perovskites. The perovskite LEDs exhibit a sky-blue emission with electroluminescence peak at 491 nm and a low turn on voltage at 2.9 V. The maximum external quantum efficiency reaches 0.015% at brightness of 186 cd/m2.