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Revealing the Posit...
Revealing the Position Effect of an Alkylthio Side Chain in Phenyl-Substituted Benzodithiophene-Based Donor Polymers on the Photovoltaic Performance of Non-Fullerene Organic Solar Cells
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- Chen, W. (författare)
- Qingdao University
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- Huang, Gongyue (författare)
- Chinese Academy of Sciences
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- Li, Xiaoming (författare)
- Chinese Academy of Sciences
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- Li, Yonghai (författare)
- Chinese Academy of Sciences
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- Wang, Huan (författare)
- Qingdao University
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- Jiang, H. X. (författare)
- Chinese Academy of Sciences
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- Zhao, Zhihui (författare)
- Qingdao University
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- Yu, Donghong (författare)
- Aalborg Universitet,Aalborg University
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- Wang, Ergang, 1981 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Yang, R. (författare)
- Chinese Academy of Sciences
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(creator_code:org_t)
- 2019-08-13
- 2019
- Engelska.
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Ingår i: ACS Applied Materials & Interfaces. - : American Chemical Society (ACS). - 1944-8252 .- 1944-8244. ; 11:36, s. 33173-33178
- Relaterad länk:
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- In this work, position effects of an alkylthio side chain were investigated by designing and synthesizing two copolymers based on a phenyl-substituted benzo[1,2-b:4,5-b′]dithiophene (BDTP) and difluorobenzotriazole (FTAZ). The polymer based on the meta-position-alkylthiolated BDTP, named m-PBDTPS-FTAZ, showed a relatively broader bandgap (2.00 vs 1.96 eV) and lower highest occupied molecular orbital (HOMO) energy level (-5.40 vs-5.32 eV) than its para-positioned structural isomeric analogue polymer (named p-PBDTPS-FTAZ), that is, m- A nd p-PBDTPS-FTAZ with the side chain structured as ethylhexyl-in the phenyl unit and hexyldecyl-in the FTAZ moiety. When blended with ITIC, m-PBDTPS-FTAZ showed a comparable crystallinity but more uniform morphology compared to that of p-PBDTPS-FTAZ. A high power conversion efficiency of 13.16% was achieved for m-PBDTPS-FTAZ:ITIC devices with a high open circuit voltage (VOC) of 0.95 V, which is higher than that of p-PBDTPS-FTAZ:ITIC devices (10.86%) with a VOC of 0.89 V. Therefore, m-BDTPS could be an effective donor unit to construct high-efficiency polymers due to its effectively decreased HOMO energy level of polymers while still maintaining good molecular stacking.
Ämnesord
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
Nyckelord
- conjugated polymers
- position effects
- broad bandgap
- side chains
- polymer solar cells
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Till lärosätets databas
- Av författaren/redakt...
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Chen, W.
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Huang, Gongyue
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Li, Xiaoming
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Li, Yonghai
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Wang, Huan
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Jiang, H. X.
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Zhao, Zhihui
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Yu, Donghong
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Wang, Ergang, 19 ...
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Yang, R.
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- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Polymerkemi
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Chalmers tekniska högskola