期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 220, 期 -, 页码 634-640出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.05.128
关键词
Photo sensor; Perylene/graphene composite; EHD; Flexible sensor; Photo conduction
资金
- Jeju National University
Graphene-based composites represent a new class of materials with potential for many electronic applications. Especially, any polymer's property can be tuned by attaching it to graphene. In this paper, we propose a passive photo sensor based on a single layer of perylene/graphene composite, which is deposited in comb type silver electrodes separated as 50 mu m spacing. The electrical conductivity of perylene is increased by blending with graphene. Photo sensing layer (120 nm thick) and Silver electrodes (50 mu m width and 350 nm thick) are deposited on poly( ethylene terephthalate) (PET) substrate through electro-hydrodynamic (EHD) system, which is cost effective, environmentally friendly, and non-vacuum e-printing technology. The proposed photo sensor detects a terminal resistance inversely varied by an incident light in the range between 78 G Omega in dark and 25 GSZ at light intensity of 400 lux. The device response is maximum on wavelength range 465-535 nm at blue light. The device exhibited bendability up to 4 mm diameter for 1000 endurance cycles. The surface morphology analysis is carried out with FE-SEM and microscope. (C) 2015 Elsevier B.V. All rights reserved.
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