p-Cu2O 壳/n-TiO2 纳米线核异质结构光电二极管。

p-Cu2O-shell/n-TiO2-nanowire-core heterostucture photodiodes.

机构信息

National Nano Device Laboratories, Tainan, 741, Taiwan, PR China.

出版信息

Nanoscale Res Lett. 2011 Oct 31;6(1):575. doi: 10.1186/1556-276X-6-575.

DOI:10.1186/1556-276X-6-575

PMID:22040099

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3218093/

Abstract

This study reports the deposition of cuprous oxide [Cu2O] onto titanium dioxide [TiO2] nanowires [NWs] prepared on TiO2/glass templates. The average length and average diameter of these thermally oxidized and evaporated TiO2 NWs are 0.1 to 0.4 μm and 30 to 100 nm, respectively. The deposited Cu2O fills gaps between the TiO2 NWs with good step coverage to form nanoshells surrounding the TiO2 cores. The p-Cu2O/n-TiO2 NW heterostructure exhibits a rectifying behavior with a sharp turn-on at approximately 0.9 V. Furthermore, the fabricated p-Cu2O-shell/n-TiO2-nanowire-core photodiodes exhibit reasonably large photocurrent-to-dark-current contrast ratios and fast responses.

摘要

本研究报告了将氧化亚铜 [Cu2O] 沉积到在 TiO2/玻璃模板上制备的二氧化钛 [TiO2] 纳米线 [NWs] 上。这些热氧化和蒸发的 TiO2 NWs 的平均长度和平均直径分别为 0.1 至 0.4 μm 和 30 至 100 nm。沉积的 Cu2O 用良好的阶梯覆盖率填充 TiO2 NWs 之间的间隙，形成围绕 TiO2 核的纳米壳。p-Cu2O/n-TiO2 NW 异质结表现出整流行为，在大约 0.9 V 时急剧开启。此外，所制造的 p-Cu2O-壳/n-TiO2-纳米线核光电二极管表现出相当大的光电流与暗电流的对比度和快速响应。