Transient and Flexible Photodetectors
Journal
ACS Applied Nano Materials
Journal Volume
24
Journal Issue
3
Pages
5092-5100
Date Issued
2018
Author(s)
Lin, Shih-Yao
Abstract
With the rapid development of technology, electronic devices have become omnipresent in our daily life as they have brought much convenience in every aspect of human activity. Side-by-side, electronic waste (e-waste) has become a global environmental burden creating an ever-growing ecological problem. The transient device technology in which the devices can physically disappear completely in different environmental conditions has attracted widespread attention in recent years owing to its emerging application potential spanning from biomedical to military use. In this work, we demonstrated the first attempt for a dissolvable ecofriendly flexible photodetector using a hybrid of graphene and chlorophyll on a poly(vinyl alcohol) substrate. The whole device can physically disappear in aqueous solutions in a time span of 30 min, while it shows a photoresponsivity of 200 A W-1 under ambient conditions. The high carrier mobility of graphene and strong absorption strength of a green photon harvesting layer, chlorophyll, result in the photocurrent gain of the device as high as 103 with subsecond response time under the illumination of red light. The newly designed photodetector shown here yields zero waste with a minimum impact on the environment, which is very useful for the development of the sustainability of our planet. © 2018 American Chemical Society.
Subjects
chlorophyll; graphene; optoelectronics; photodetectors; transient
SDGs
Other Subjects
Chlorophyll; Electronic Waste; Environmental technology; Graphene; Optoelectronic devices; Photodetectors; Photons; Polyvinyl alcohols; Sustainable development; Transients; Wastes; Device technologies; Electronic waste (e waste); Emerging applications; Environmental burdens; Environmental conditions; Flexible photodetectors; High carrier mobility; Impact on the environment; Electron devices
Type
journal article