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Boosting Responsivity of Organic-Metal Oxynitride Hybrid Heterointerface Phototransistor

Title
Boosting Responsivity of Organic-Metal Oxynitride Hybrid Heterointerface Phototransistor
Author
박진성
Keywords
phototransistor; bulk heterojunction; zinc oxynitride; oxide semiconductor; heterointerface; thin-film transistor
Issue Date
2016-05
Publisher
AMER CHEMICAL SOC
Citation
ACS APPLIED MATERIALS & INTERFACES, v. 8, NO 23, Page. 14665-14670
Abstract
Amorphous metal oxides are attractive materials for various sensor applications, because of high electrical performance and easy processing. However, low absorption coefficient, slow photoresponse, and persistent photoconductivity of amorphous metal oxide films from the origin of deep-level defects are obstacles to their use as photonic applications. Here, we demonstrate ultrahigh photoresponsivity of organic-inorganic hybrid phototransistors featuring bulk heterojunction polymers and low bandgap zinc oxynitride. Spontaneous formation of ultrathin zinc oxide on the surface of zinc oxynitride films could make an effective band-alignment for electron transfer from the dissociation of excitons in the bulk heterojunction, while holes were blocked by the deep highest occupied molecular orbital level of zinc oxide. These hybrid structure-based phototransistors are ultrasensitive to broad-bandwidth photons in ultraviolet to near infrared regions. The detectivity and a linear dynamic range exceeded 10(12) Jones and 122.3 dB, respectively.
URI
https://pubs.acs.org/doi/10.1021/acsami.6b02814http://repository.hanyang.ac.kr/handle/20.500.11754/70309
ISSN
1944-8244
DOI
10.1021/acsami.6b02814
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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