Akhil M. Anand, Aruna Raj, Jishad A. Salam, R. Adithya Nath, R. Jayakrishnan
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引用次数: 0
摘要
自组装是最有前途的低成本、高通量纳米制造方法。本文报告了使用氢氧化钾（KOH）水溶液作为氧化剂，在室温下优化自组装工艺，在铜基底上生长基于氧化铜（CuO）的纳米结构。通过 X 射线衍射 (XRD) 和微拉曼分析，确认了在铜基底上生长的 CuO 纳米结构的单斜相。利用 X 射线光电子能谱（XPS）从氧化态确认了纳米结构的整体化学成分为氧化铜。光电探测器的结构为 Cu/CuO/Ag。光电探测器对紫外线和可见光照明均有响应。优化后的 Cu/CuO/Ag 结构在 0.01 V 的偏置电压下的响应率约为 1.65 µA/W，导通与关断比约为 69。
Photoconductivity in self-assembled CuO thin films
Self-assembly is the most promising low-cost and high-throughput methodology for nanofabrication. This paper reports the optimization of a self-assembly process at room temperature for the growth of copper oxide (CuO) based nanostructures over a copper substrate using aqueous potassium hydroxide (KOH) solution as the oxidizing agent. The monoclinic phase of CuO nanostructures grown over the copper substrate was confirmed from the X-ray diffraction (XRD) and micro-Raman analysis. The overall chemical composition of nanostructures was confirmed to be that of CuO from its oxidation state using X-ray photoelectron spectroscopy (XPS). Photodetectors were engineered with the structure Cu/CuO/Ag. The photodetectors exhibited a response to both ultraviolet and visible light illumination. The optimized Cu/CuO/Ag structure exhibits a responsivity of ~ 1.65 µA/W, with an ON:OFF ratio of ~ 69 under a bias voltage of 0.01 V. The temporal dependence of photo-response for the optimized photodetector displayed the persistent nature of photoconduction indicating a delay in charge carrier recombination which could potentially be exploited for photovoltaic applications.
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Energy is the single most valuable resource for human activity and the basis for all human progress. Materials play a key role in enabling technologies that can offer promising solutions to achieve renewable and sustainable energy pathways for the future.
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