基于协同溶剂工程的准二维钙钛矿薄膜的高亮度钙钛矿发光二极管。
Highly bright perovskite light-emitting diodes based on quasi-2D perovskite film through synergetic solvent engineering.
作者信息
Yue Huanxin, Song Dandan, Zhao Suling, Xu Zheng, Qiao Bo, Wu Songquan, Meng Juan
机构信息
Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University Beijing 100044 China
Institute of Optoelectronic Technology, Beijing Jiaotong University Beijing 100044 China.
出版信息
RSC Adv. 2019 Mar 14;9(15):8373-8378. doi: 10.1039/c9ra00912d. eCollection 2019 Mar 12.
Recently, quasi-two dimensional (2D) perovskites have attracted great interest as they can be facilely fabricated and yield high photoluminescence quantum yield. However, the luminance and the efficiency of perovskite light-emitting diodes (PeLEDs) based on quasi-2D perovskites are limited by the carrier transport and the crystallization properties of the quasi-2D perovskite films. Herein, a synergetic solvent engineering approach is proposed to improve the crystallinity and the carrier transport by optimizing the film morphology of the quasi-2D perovskite films. Consequently, the maximum luminance of green PeLEDs based on quasi-2D PEA (MAPbBr)PbBr perovskite is dramatically enhanced from 4000 cd m to 18 000 cd m and the current efficiency increases from 3.40 cd A to 8.74 cd A. This work provides a promising way to control the morphology and the crystallinity properties of quasi-2D perovskite films for high-performance optoelectronic devices.
最近，准二维（2D）钙钛矿因其易于制备且具有高光致发光量子产率而备受关注。然而，基于准二维钙钛矿的钙钛矿发光二极管（PeLEDs）的亮度和效率受到准二维钙钛矿薄膜的载流子传输和结晶性能的限制。在此，提出了一种协同溶剂工程方法，通过优化准二维钙钛矿薄膜的形貌来提高结晶度和载流子传输。因此，基于准二维PEA（MAPbBr）PbBr钙钛矿的绿色PeLEDs的最大亮度从4000 cd m显著提高到18000 cd m，电流效率从3.40 cd A提高到8.74 cd A。这项工作为控制准二维钙钛矿薄膜的形貌和结晶性能以用于高性能光电器件提供了一条有前景的途径。
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