2D/0D graphene hybrids for visibleblind flexible UV photodetectors

被引：44
|
作者：
Tetsuka, Hiroyuki [1 ]
机构：
[1] Toyota Cent Res & Dev Labs Inc, Frontier Res Domain, 41-1 Yokomichi, Nagakute, Aichi 4801192, Japan
来源：
SCIENTIFIC REPORTS | 2017年 / 7卷
关键词：
QUANTUM DOTS; ULTRAVIOLET PHOTODETECTOR; SPECTRAL RESPONSE; PERFORMANCE; PHOTOTRANSISTORS; PHOTODIODES; GAIN;
D O I：
10.1038/s41598-017-05981-y
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Nitrogen-functionalized graphene quantum dots (NGQDs) are attractive building blocks for optoelectronic devices because of their exceptional tunable optical absorption and fluorescence properties. Here, we developed a high-performance flexible NGQD/graphene field-effect transistor (NGQD@GFET) hybrid ultraviolet (UV) photodetector, using dimethylamine-functionalized GQDs (NMe2-GQDs) with a large bandgap of ca. 3.3 eV. The NMe2-GQD@GFET photodetector exhibits high photoresponsivity and detectivity of ca. 1.5 x 10(4) A W- (1) and ca. 5.5 x 10(11) Jones, respectively, in the deep-UV region as short as 255 nm without application of a backgate voltage. The feasibility of these flexible UV photodetectors for practical application in flame alarms is also demonstrated.
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页数：7
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