ENHANCEMENT OF REDUCED GRAPHENE OXIDE BOLOMETRIC PHOTORESPONSE VIA ADDITION OF GRAPHENE QUANTUM DOTS

被引：2
作者：
Lai, S. [1 ]
Chen, M. [1 ]
Khanin, Yu N. [2 ]
Novoselov, K. S. [1 ,3 ,4 ,5 ]
Andreeva, D., V [1 ,3 ]
机构：
[1] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117575, Singapore
[2] Russian Acad Sci, Inst Microelect Technol, Chernogolovka 142432, Russia
[3] Natl Univ Singapore, Ctr Adv 2D Mat, Singapore 117546, Singapore
[4] Univ Manchester, Natl Graphene Inst, Oxford Rd, Manchester M13 9PL, Lancs, England
[5] Chongqing 2D Mat Inst, Chongqing 400714, Peoples R China
来源：
SURFACE REVIEW AND LETTERS | 2021年 / 28卷 / 08期
基金：
英国工程与自然科学研究理事会; 欧洲研究理事会;
关键词：
Graphene; graphene oxide; quantum dots; photodetector; VITAMIN-C; PHOTOTRANSISTORS;
D O I：
10.1142/S0218625X21400114
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Reduced graphene oxide (rGO) has attracted interest in its potential application in large area photodetectors owing to its ease of manufacture and wideband optical absorbance. Here, we report that thin rGO films produced via vacuum filtration of GO followed by reduction by immersion in L-ascorbic acid are capable of sensing light through a bolometric mechanism. The photoresponse of these rGO thin films can be further enhanced by dropcasting graphene quantum dots (GQDs) on the rGO surface. These GQDs were observed to increase the opacity of the rGO film and hence its absorptivity of light, thereby enabling a significant increase in the photoresponse of the device.
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页数：7
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