Journal ArticleDOI
Effects of π-Conjugated Bridges on Photovoltaic Properties of Donor-π-Acceptor Conjugated Copolymers
Xiaochen Wang,Xiaochen Wang,Yeping Sun,Yeping Sun,Song Chen,Xia Guo,Maojie Zhang,Xiaoyu Li,Yongfang Li,Haiqiao Wang +9 more
TLDR
A series of conjugated donor (D)-π-acceptor (A) copolymers, P(BDT-F-BT), P( BDT-T-BT, and P(BDT-TT-BT) based on benzodithiophene (BDT) donor unit and benzothiadiazole (BT) acceptor unit with different π-bridges, were designed and synthesized via a Pd-catalyzed Stille-coupling method as discussed by the authors.Abstract:
A series of conjugated donor (D)-π-acceptor (A) copolymers, P(BDT-F-BT), P(BDT-T-BT), and P(BDT-TT-BT), based on benzodithiophene (BDT) donor unit and benzothiadiazole (BT) acceptor unit with different π-bridges, were designed and synthesized via a Pd-catalyzed Stille-coupling method. The π-bridges between the BDT donor unit and BT acceptor unit are furan (F) in P(BDT-F-BT), thiophene (T) in P(BDT-T-BT) and thieno[3,2-b]thiophene (TT) in P(BDT-TT-BT). It was found that the π-bridges significantly affect the molecular architecture and optoelectronic properties of the copolymers. With the π-bridge varied from furan to thiophene, then to thieno[3,2-b]thiophene, the shape of the molecular chains changed from z-shaped to almost straight line gradually. Band gaps of P(BDT-F-BT), P(BDT-T-BT) and P(BDT-TT-BT) were tuned from 1.96 to 1.82 to 1.78 eV with HOMO levels up-shifted from −5.44 to −5.35 to −5.21 eV, respectively. Bulk heterojunction solar cells with the polymers as donor and PC71BM as acceptor demonstrat...read more
Citations
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Journal ArticleDOI
Molecular Design of Benzodithiophene-Based Organic Photovoltaic Materials.
TL;DR: This review offered an overview of the organic photovoltaic materials based on BDT from the aspects of backbones, functional groups, alkyl chains, and device performance, trying to provide a guideline about the structure-performance relationship.
Journal ArticleDOI
Thienothiophenes, Dithienothiophenes, and Thienoacenes: Syntheses, Oligomers, Polymers, and Properties
Journal ArticleDOI
Highly Efficient Inverted Organic Solar Cells Through Material and Interfacial Engineering of Indacenodithieno[3,2‐b]thiophene‐Based Polymers and Devices
Jeremy J. Intemann,Kai Yao,Kai Yao,Yongxi Li,Hin-Lap Yip,Yun-Xiang Xu,Po-Wei Liang,Chu-Chen Chueh,Feizhi Ding,Xi Yang,Xiaosong Li,Yiwang Chen,Alex K.-Y. Jen +12 more
TL;DR: In this article, a synergistic approach combining new material design and interfacial engineering of devices is adopted to produce high efficiency inverted solar cells by incorporating either an alkyl thiophene (PIDTT-DFBT-T) or alkyal thieno[3,2-b]thiophene π-bridge as spacer.
Journal ArticleDOI
Significant Enhancement of Polymer Solar Cell Performance via Side-Chain Engineering and Simple Solvent Treatment
TL;DR: In this article, a new series of donor-acceptor co-polymers with various side groups was developed for bulk-heterojunction PSCs, and the reduction of the bandgap of polymers and the enhancement of charge mobility in the devices can be accomplished concurrently by substituting the alkylthienyl side group with its furan counterpart.
Journal ArticleDOI
Fluorinated conjugated polymers in organic bulk heterojunction photovoltaic solar cells
TL;DR: In this article, the authors highlight recent strategies aiming at improving the solar cell performance by variable fluorine substitution of repeating units, which can achieve a modulation of HOMO and LUMO energy levels and optical properties to some extent.
References
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Journal ArticleDOI
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Journal ArticleDOI
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Jeff Peet,Jin Young Kim,Nelson E. Coates,Wanli Ma,Daniel Moses,Alan J. Heeger,Guillermo C. Bazan +6 more
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Journal ArticleDOI
Polymer solar cells with enhanced open-circuit voltage and efficiency
Hsiang-Yu Chen,Hsiang-Yu Chen,Jianhui Hou,Shaoqing Zhang,Yongye Liang,Guanwen Yang,Yang Yang,Luping Yu,Yue Wu,Gang Li +9 more
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