標題: Ladder-Type Nonacyclic Structure Consisting of Alternate Thiophene and Benzene Units for Efficient Conventional and Inverted Organic Photovoltaics
作者: Cheng, Yen-Ju
Chen, Chiu-Hsiang
Lin, Yu-Shun
Chang, Chih-Yu
Hsu, Chain-Shu
應用化學系
Department of Applied Chemistry
關鍵字: ladder-type structure;organic photovoltaics;alternating copolymer
公開日期: 22-十一月-2011
摘要: A ladder-type nonacyclic thienyl-phenylene-thienylene-phenylene-thienyl TPTPT unit, consisting of alternate interfused thiophene and benzene units, is designed and synthesized. This multifused distannyl-TPTPT monomer was polymerized with two electron-deficient acceptors, 4,7-dibromo-2,1,3-benzothiadiazole BT and 5,8-dibromo-2,3-diphenylquinoxaline QX monomers, by Stile coupling reaction to afford two alternating donor acceptor copolymers, PTPTPTBT and PTPTPTQX, respectively. Because of the covalent planarization of the conjugated framework, PTPTPTBT simultaneously possess excellent solubilities for solution-processability, low bandgaps with suitable position of HOMO/LUMO energy levels, and high hole mobilities. The devices based on the PTPTPTBT/PC(71)BM blend not only showed a promising PCE of 5.3% with conventional configuration but also achieved a high PCE of 5.9% with inverted configuration. This value is among the highest performance from the inverted solar cells incorporating a donor acceptor low bandgap polymer.
URI: http://dx.doi.org/10.1021/cm202612t
http://hdl.handle.net/11536/14648
ISSN: 0897-4756
DOI: 10.1021/cm202612t
期刊: CHEMISTRY OF MATERIALS
Volume: 23
Issue: 22
起始頁: 5068
結束頁: 5075
顯示於類別:期刊論文


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