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题名: Hexa-peri-hexabenzocoronene and diketopyrrolopyrrole based D-A conjugated copolymers for organic field effect transistor and polymer solar cells
作者: Gao, Chen1, 2; Qiao, Zi1; Shi, Keli1, 3; Chen, Song1; Li, Yongfang3; Yu, Gui3; Li, Xiaoyu1; Wang, Haiqiao1, 2
关键词: Hexa-peri-hexabenzocoronene ; D-A conjugated copolymers ; Polymer solar cells ; Organic field effect transistor
刊名: ORGANIC ELECTRONICS
发表日期: 2016-11-01
卷: 38, 页:245-255
收录类别: SCI
英文摘要: Hexa-peri-hexabenzocoronene (HBC) is a disc-shaped conjugated molecule with strong pi-pi stacking property, high intrinsic charge mobility and good self-assembly property. But for a long time, the organic photovoltaic (OPV) solar cells based on HBC small organic molecules demonstrated low power conversion efficiencies (PCEs). In this study, a series of polymers named as PHBCDPPC20, PHBCDPPC8, PHBCDPPF and PHBCDPPDT were designed and synthesized through copolymerization of HBC with bulky mesityl substituents and strong electron-withdrawing diketopyrrolopyrrole (DPP) with different alkyl side chains and various pi-bridges. Introduction of DPP unit into the HBC derivatives broadened the absorption spectra and lowered the band gaps. Bulky mesityl substituents attached to periphery of HBC prevented polymers from self-aggregating into too large domain size in the blend films of photovoltaic devices. The different pi-bridges have significant effect on the structure conformation of the polymers. The polymer PHBCDPPDT with bithiophene pi-bridges demonstrated the broadest absorption for its extensive pi-conjugation and more coplanar conformation compared with the thiophene pi-bridge one. PHBCDPPC20, PHBCDPPC8, PHBCDPPF and PHBCDPPDT gave field-effect hole mobilities of 1.35 x 10(-3), 2.31 x 10(-4), 2.79 x 10(-4) and 8.60 x 10(-3) cm(2) V-1 s(-1), respectively. The solar cells based on these polymers displayed PCEs of 2.12%, 2.85%, 1.89% and 2.74%. To our knowledge, 2.85% is the highest PCE for the HBC-based photovoltaic materials till now. (C) 2016 Published by Elsevier B.V.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35503
Appears in Collections:有机固体实验室_期刊论文

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作者单位: 1.Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composite, Beijing 100029, Peoples R China
2.Beijing Univ Chem Technol, Key Lab Carbon Fiber & Funct Polymers, Minist Educ, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China
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