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Molecular Engineering of a Donor-Acceptor Polymer To Realize Single Band Absorption toward a Red-Selective Thin-Film Organic Photodiode
- Molecular Engineering of a Donor-Acceptor Polymer To Realize Single Band Absorption toward a Red-Selective Thin-Film Organic Photodiode
- Hassan, Syed Zahid; Cheon, Hyung Jin; Choi, Changwon; Yoon, Seongwon; Kang, Mingyun; Cho, Jangwhan; Jang, Yun Hee; Kwon, Soon-Ki; Chung, Dae Sung; Kim, Yun-Hi
- DGIST Authors
- Jang, Yun Hee; Chung, Dae Sung
- Issue Date
- ACS Applied Materials and Interfaces, 11(31), 28106-28114
- Article Type
- Author Keywords
- color-selective; donor-acceptor copolymers; diketopyrrolopyrroles; organic photodiodes; image sensors
- DIKETOPYRROLOPYRROLE-BASED COPOLYMERS; CONJUGATED POLYMERS; CHARGE-TRANSFER; HIGH-PERFORMANCE; PHOTODETECTORS; MOBILITY; SENSITIVITY; SCATTERING; SPECTRA; ORDER
- 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-Th-DPP 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 1012 Jones while maintaining a thin active layer thickness of ∼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. © 2019 American Chemical Society.
- American Chemical Society
- Related Researcher
Jang, Yun Hee
CMMM Lab(Curious Minds Molecular Modeling Laboratory)
Multiscale molecular modeling (quantum mechanics calculation; molecular dynamics simulation) : Supercomputer-assisted molecular-level understanding of materials and their chemistry; which leads to rational design of high-performance organic-inorganic-hybrid materials for clean and renewable energy as well as low-energy-consumption electronic devices
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- Department of Energy Science and EngineeringCMMM Lab(Curious Minds Molecular Modeling Laboratory)1. Journal Articles
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