Van Der Waals Hybrid Perovskite of High Optical Quality by Chemical Vapor Deposition
Van Der Waals Hybrid Perovskite of High Optical Quality by Chemical Vapor Deposition
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DOI：
10.1002/adom.201700373
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发表时间：
2017-11-02
影响因子：
9
通讯作者：
Shi, Jian
中科院分区：
文献类型：
--
作者：
Chen, Zhizhong;Wang, Yiping;Shi, Jian
2D杂化钙钛矿（RNH 3）（2）PbX 4材料不仅是研究极化激元动力学等基础物理的理想平台，而且在光电和电光应用方面也显示出了希望。然而，为了制备高光学质量的晶体，过去必须应用机械剥离。本文报道了高光学质量（C_4H_9NH_3）（2）PbI_4单晶片的气相生长。单个单晶畴显示出约5-10 μ m的横向尺寸，具有限定的矩形形状。光谱研究表明，室温下的光致发光的半峰全宽为70毫电子伏和几纳秒的衰变寿命，表明高品质的机械剥离的同行。激子结合能为279 +/- 46 meV，电子-声子耦合强度约为20 meV。这种基于真空的方法可以提供用于将层状钙钛矿集成到光电器件和系统中的解决方案。
2D hybrid perovksite (RNH3)(2)PbX4 materials not only serve as ideal platforms to study fundamental physics such as polariton dynamics but also show promise for optoelectronic and electro-optic applications. However, for the preparation of high optical quality crystals, mechanical exfoliation has to be applied in the past. In this work, the vapor phase growth of single crystalline (C4H9NH3)(2)PbI4 flakes with high optical quality is reported. Individual single crystalline domains show lateral size about 5-10 mu m with defined rectangular shape. Spectroscopic studies show room temperature photoluminescence full width at half maximum of 70 meV and decay lifetime of several nanoseconds, indicating comparably high quality with mechanically exfoliated counterparts. Exciton binding energy 279 +/- 46 meV and electron-phonon coupling strength around 20 meV are revealed. This vacuum-based method may provide a solution for integrating layered perovskites into optoelectronic devices and systems.