Lu Chengyu, Dai Qinyong, Tang Chenyu, Wang Xinyu, Xu Sunan, Sun Lei, Peng Yingquan, Lv Wenli
Institute of Microelectronics, College of Optical and Electronic Technology, China Jiliang University, Hangzhou, People's Republic of China.
National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, People's Republic of China.
Nanotechnology. 2023 Sep 18;34(49). doi: 10.1088/1361-6528/acf502.
One-dimensional nanowire structures composed of perovskite are widely recognized for their exceptional optoelectronic performance and mechanical properties, making them a popular area of investigation in photodetection research. In this work, a perovskite nanowire/copper phthalocyanine heterojunction-based photodetector was fabricated, which exhibits high photoresponse in the visible-near-infrared region. The incorporation of a heterojunction significantly enhanced the photoelectric performance. Specifically, the photoresponsivity and external quantum efficiency of the nanowire-based device were elevated from 58.5 A Wand 1.35 × 10% to 84.5 A Wand 1.97 × 10% at 532 nm, respectively. The enhanced photoresponse of the heterojunction device can be attributed to the unique microstructure of nanowire arrays. The wrapping of the nanowires by copper phthalocyanine forms heterojunctions with a larger dissociation area, which facilitated exciton dissociation and enhanced device performance. This work provides a promising example for optimizing the performance of nanowire devices.
由钙钛矿组成的一维纳米线结构因其卓越的光电性能和机械性能而广受认可，这使其成为光电探测研究中一个热门的研究领域。在这项工作中，制备了一种基于钙钛矿纳米线/铜酞菁异质结的光电探测器，该探测器在可见光-近红外区域表现出高光响应。异质结的引入显著提高了光电性能。具体而言，在532nm处，基于纳米线的器件的光响应度和外量子效率分别从58.5 A/W和1.35×10%提高到了84.5 A/W和1.97×10%。异质结器件光响应增强可归因于纳米线阵列独特的微观结构。铜酞菁对纳米线的包裹形成了解离面积更大的异质结，这有利于激子解离并提高了器件性能。这项工作为优化纳米线器件的性能提供了一个有前景的范例。
