Vapor Phase Synthesis of Organometal Halide Perovskite Nanowires for Tunable Room-Temperature Nanolasers
Vapor Phase Synthesis of Organometal Halide Perovskite Nanowires for Tunable Room-Temperature Nanolasers
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DOI：
10.1021/acs.nanolett.5b01166
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发表时间：
2015-07-01
期刊：
影响因子：
10.8
通讯作者：
Xiong, Qihua
中科院分区：
文献类型：
--
作者：
Xing, Jun;Liu, Xin Feng;Xiong, Qihua
在过去十年中，半导体纳米线由于量子尺寸效应带来的前所未有的物理特性以及强各向同性，并且作为纳米电子和光电器件的潜在构建模块具有先进的应用，受到了相当大的关注。最近，有机 - 无机杂化钙钛矿已被证明具有高光学吸收系数、最佳直接带隙和长电子/空穴扩散长度，从而产生了高性能的光伏器件。在此，我们介绍了气相合成的独立的CH₃NH₃PbI₃、CH₃NH₃PbBr₃和CH₃NH₃PbIxCl₃ - x高结晶度钙钛矿纳米线。这些矩形截面的钙钛矿纳米线具有良好的光学性能和长电子 - 空穴扩散长度，这确保了足够的增益和有效的光反馈。实际上，我们已经展示了光泵浦室温下的CH₃NH₃PbI₃纳米线激光器，其近红外波长为777 nm，阈值低至11 μJ/cm²，品质因数高达405。我们的研究表明基于有机 - 无机钙钛矿纳米线的光电器件具有良好的应用前景。
Semiconductor nanowires have received considerable attention in the past decade driven by both unprecedented physics derived from the quantum size effect and strong isotropy and advanced applications as potential building blocks for nanoscale electronics and optoelectronic devices. Recently, organic-inorganic hybrid perovskites have been shown to exhibit high optical absorption coefficient, optimal direct band gap, and long electron/hole diffusion lengths, leading to high-performance photovoltaic devices. Herein, we present the vapor phase synthesis free-standing CH3NH3PbI3, CH3NH3PbBr3, and CH3NH3PbIxCl3-x, perovskite nanowires with high crystallinity. These rectangular cross-sectional perovskite nanowires have good optical properties and long electron hole diffusion length, which ensure adequate gain and efficient optical feedback. Indeed, we have demonstrated optical-pumped room-temperature CH3NH3PbI3 nanowire lasers with near-infrared wavelength of 777 nm, low threshold of 11 mu J/cm(2), and a quality factor as high as 405. Our research advocates the promise of optoelectronic devices based on organic-inorganic perovskite nanowires.