激光与光电子学进展, 2018, 55 (10): 102301, 网络出版: 2018-10-14   

MAPbI3钙钛矿纳米线光电探测器 下载: 1135次

MAPbI3 Perovskite Nanowire Photodetectors
作者单位
太原理工大学物理与光电工程学院, 新型传感与智能控制教育部重点实验室, 山西 太原 030024
摘要
有机-无机杂化钙钛矿纳米材料因其具有直接带隙、吸收系数高、载流子迁移率高等特点成为新一代优良的光电探测材料。诸多研究表明该纳米材料具有量子点、纳米线、纳米棒、纳米片等多种形貌。纳米线结构具有各向异性, 光生载流子沿其轴向高效传输, 有利于改善光电探测器的电荷提取效率。基于此, 采用自组装生长法制备了钙钛矿纳米线阵列, 当前驱体溶液质量分数从10%逐渐减小为0.2%时, 纳米线直径从微米量级减小至百纳米量级。将0.5%的前驱体溶液所得的纳米线阵列应用到光电探测器中, 器件在2 V偏压、660 nm红光照射下亮暗电流比高达3.7×104, 外量子效率高达180.88%, 而暗电流密度低至1 pA。器件光电探测性能的显著改善归功于自组装生长的纳米线在径向的均匀排布及其高结晶质量。
Abstract
Organic-inorganic hybrid perovskite is a promising new generation of photodetection materials due to its advantages of direct bandgap, high absorption coefficient, and high carrier mobility. Researches have shown that the perovskite nanomaterials have various morphologies, such as quantum dots, nanowires, nanorods, and nanosheets. In particular the anisotropic nanowires photogenerated carriers transmit efficiently along the axial direction, which enhances the charge extraction efficiency of the photodetector. In this paper, the perovskite nanowire arrays were prepared by the self-assembly growth method. When the mass fraction of precursor solution decreased from 10% to 0.2%, the diameter of nanowires was reduced from micron to hundred nanometer scale. A photodetector based on nanowire arrays obtained from 0.5% precursor solution was reported. The light-to-dark response ratio of the device was as high as 3.7×104, the external quantum efficiency reached up to 180.88%, and the dark current density was as low as 1 pA. All data were measured under 2 V bias voltage and 660 nm red light. The remarkable improvement of the photodetector performance is attributed to the radial uniform distribution of the nanowires and high crystallization quality.

刘艳珍, 崔艳霞. MAPbI3钙钛矿纳米线光电探测器[J]. 激光与光电子学进展, 2018, 55(10): 102301. Liu Yanzhen, Cui Yanxia. MAPbI3 Perovskite Nanowire Photodetectors[J]. Laser & Optoelectronics Progress, 2018, 55(10): 102301.

本文已被 2 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!