Highly Dense ZnO Nanowires Grown on Graphene Foam for Ultraviolet Photodetection

被引：92
作者：
Boruah, Buddha Deka [1 ]
Mukherjee, Anwesha [1 ]
Sridhar, S. [1 ]
Misra, Abha [1 ]
机构：
[1] Indian Inst Sci, Dept Instrumentat & Appl Phys, Bangalore 560012, Karnataka, India
来源：
ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 19期
关键词：
Zinc oxide; nanowire; graphene foam; heterostructure; photodetector; ZINC-OXIDE NANOSTRUCTURES; PHOTOLUMINESCENCE; RAMAN; PHOTOCONDUCTIVITY; EFFICIENCY; SCHOTTKY; NANORODS; SENSOR;
D O I：
10.1021/acsami.5b02403
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Growth of highly dense ZnO nanowires (ZnO NWs) is demonstrated on three-dimensional graphene foam (GF) using resistive thermal evaporation technique. Photoresponse of the as-grown hybrid structure of ZnO NWs on GF (ZnO NWs/GF) is evaluated for ultraviolet (UV) detection. Excellent photoresponse with fast response and recovery times of 9.5 and 38 s with external quantum efficiency of 2490.8% is demonstrated at low illumination power density of 1.3 mW/cm(2). In addition, due to excellent charge carrier transport, mobility of graphene reduces the recombination rate of photogenerated charge carriers, hence the lifetime of photogenerated free charge carriers enhances in the photodetectors.
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收藏
页码：10606 / 10611
页数：6
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