光电流
纳米花
光电效应
材料科学
光电探测器
结晶度
光电导性
纳米结构
光电子学
退火(玻璃)
电导率
纳米技术
化学
复合材料
物理化学
作者
Ziliang Li,Fatemeh Davar,Jiaxin Chen,Ziqing Li,Xiaosheng Fang
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2020-09-21
卷期号:3 (10): 10190-10199
被引量:37
标识
DOI:10.1021/acsanm.0c02166
摘要
Effective engineering of materials with distinctive nanoscale microstructures provides lots of opportunities to explore their underlying photoelectric phenomena deeply. Here, the microstructural and photoelectric characteristics of a CdS/CdSO4 flower-like nanostructure (nanoflower) prepared by a simple chemical route and a following thermal treatment were investigated. A hybrid composition of cubic CdS, hexagonal CdS, and CdSO4 phases was obtained when the thermal annealing was conducted at 480 °C. The conductivity of CdS/CdSO4 nanoflowers was significantly enhanced compared with that of pristine CdS nanoflowers, giving excellent photoelectric performances, such as high photocurrent (∼0.2 μA), photoresponse speed (trise = 2.8 ms, tfall = 14.4 ms), photoresponsivity (∼0.3 A/W), and detectivity (∼6 × 109 Jones). The conductivity gain and substantially high photoresponse speed originated from the improved crystallinity and the realization of a special microstructural defect landscape within the nanoflowers, enriching the photoelectric behavior of CdS series materials as well as the development of low-dimensional optoelectronic devices operating in a large wavelength region.
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