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Cited 20 time in webofscience Cited 22 time in scopus
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Molecular Engineering of a Donor-Acceptor Polymer To Realize Single Band Absorption toward a Red-Selective Thin-Film Organic Photodiode

Authors
Hassan, Syed ZahidCheon, Hyung JinChoi, ChangwonYoon, SeongwonKang, MingyunCho, JangwhanJang, Yun HeeKwon, Soon-KiChung, Dae SungKim, Yun-Hi
Issue Date
7-Aug-2019
Publisher
AMER CHEMICAL SOC
Keywords
color-selective; donor-acceptor copolymers; diketopyrrolopyrroles; organic photodiodes; image sensors
Citation
ACS APPLIED MATERIALS & INTERFACES, v.11, no.31, pp.28106 - 28114
Indexed
SCIE
SCOPUS
Journal Title
ACS APPLIED MATERIALS & INTERFACES
Volume
11
Number
31
Start Page
28106
End Page
28114
URI
https://scholarworks.bwise.kr/gnu/handle/sw.gnu/8857
DOI
10.1021/acsami.9b08326
ISSN
1944-8244
Abstract
Herein, we explore the strategy of realizing a red-selective thin-film organic photodiode (OPD) by synthesizing a new copolymer with a highly selective red-absorption feature. PCZ-Th-DPP, with phenanthrocarbazole (PCZ) and diketopyrrolopyrrole (DPP) as donor and acceptor units, respectively, was strategically designed/synthesized based on a time-dependent density functional theory calculation, which predicted the significant suppression of the band II absorption of PCZ-ThDPP due to the extremely efficient intramolecular charge transfer. We demonstrate that the synthesized PCZ-Th-DPP exhibits not only a high absorption coefficient within the red-selective band I region, as theoretically predicted, but also a preferential face-on intermolecular structure in the thin-film state, which is beneficial for vertical charge extraction as an outcome of a glancing incidence X-ray diffraction study. By employing PCZ-Th-DPP as a photoactive layer of Schottky OPD, to fully match its absorption characteristic to the spectral response of the red-selective OPD, we demonstrate a genuine red-selective specific detectivity in the order of 10(12) Jones while maintaining a thin active layer thickness of similar to 300 nm. This work demonstrates the possibility of realizing a full color image sensor with a synthetic approach to the constituting active layers without optical manipulation.
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자연과학대학 (화학과)
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