One-step synthesis of graphene quantum dots from defective CVD graphene and their application in IGZO UV thin film phototransistor

Zhu, Huihui, Liu, Ao, Shan, Fukai, Yang, Wenrong, Zhang, Wenling, Li, Da and Liu, Jingquan 2016, One-step synthesis of graphene quantum dots from defective CVD graphene and their application in IGZO UV thin film phototransistor, Carbon, vol. 100, pp. 201-207, doi: 10.1016/j.carbon.2016.01.016.

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Title One-step synthesis of graphene quantum dots from defective CVD graphene and their application in IGZO UV thin film phototransistor
Author(s) Zhu, Huihui
Liu, Ao
Shan, Fukai
Yang, WenrongORCID iD for Yang, Wenrong orcid.org/0000-0001-8815-1951
Zhang, Wenling
Li, Da
Liu, Jingquan
Journal name Carbon
Volume number 100
Start page 201
End page 207
Total pages 7
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-04-01
ISSN 1873-3891
Summary Chemical vapor deposition (CVD) has recently been considered as the most reliable method to prepare high-quality monolayer graphene films, yet the as-grown graphene usually contains wrinkles and cracks or suffers from discontinuity. These defects can easily result in the shredding of large-sized graphene into small pieces even under a gentle disturbance. Herein, this work presents a cost-effective new method to produce high-quality GQDs by vigorous sonication of defective CVD graphene. The prepared GQDs can be easily and stably dispersed in organic solvents. Morphology and optical properties of the GQDs are investigated using a number of techniques. And we observed the as-prepared GQDs are highly homogeneous, mostly consisted of single-layered graphene, roughly round shapes less than 8 nm in a diameter, and exhibited a strong blue luminescence. Impressively, it is also confirmed that the as-obtained GQDs can act as a promising light absorption material for phototransistor with a hybrid film of GQDs and indium gallium zinc oxide (IGZO) as the channel layer. The GQD/IGZO phototransistor exhibited an appreciated photocurrent, which is 10 times larger than that of the IGZO one when exposed to 270 nm light.
Language eng
DOI 10.1016/j.carbon.2016.01.016
Field of Research 030302 Nanochemistry and Supramolecular Chemistry
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30085360

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