Pershin, Anton and Donets, Sergii and Baeurle, Stephan A. (2014) Performance enhancement of block-copolymer solar cells through tapering the donor-acceptor interface: A multiscale Study. POLYMER, 55 (6). pp. 1507-1513. ISSN 0032-3861, 1873-2291
Full text not available from this repository. (Request a copy)Abstract
Tapered block copolymers offer an exciting opportunity to tailor the interfacial region between different components by conserving their phase-separated mesoscale structure, which enable the generation of polymer systems with the desired spatio-dynamic properties. Here, we explore their usefulness for optimizing the photovoltaic performance of polymer bulk heterojunctions. To this end, we apply a recently developed particle-based multiscale solar-cell algorithm and investigate the effect of random tapering at the chemical junctions between the electron-donor- (D) and electron-acceptor- (A) blocks on the photovoltaic properties of various lamellar-like polyfluorene-based block-copolymer systems. Our simulation results reveal that introducing a tapered middle block with optimal length leads to a significant increase of the exciton dissociation efficiency, but deteriorates the charge transport efficiency only moderately. This results in a gain of the internal quantum efficiency from 25 up to 39% by increasing the thickness of the active layer of the solar cell from 10 up to 50 nm in direction to the DA interface. (c) 2014 Elsevier Ltd. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | POWER CONVERSION EFFICIENCY; PHOTOVOLTAIC DEVICES; ELECTRON-TRANSPORT; FORCE-FIELD; POLYMER; SIMULATION; KINETICS; Photovoltaic performance of polymer bulk; heterojunctions; Tapering of donor-acceptor interface; Multiscale modeling study |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Nov 2019 13:38 |
| Last Modified: | 15 Nov 2019 13:38 |
| URI: | https://pred.uni-regensburg.de/id/eprint/10453 |
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