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Twisted Alkylthioth...
Twisted Alkylthiothien-2-yl Flanks and Extended Conjugation Length Synergistically Enhanced Photovoltaic Performance by Boosting Dielectric Constant and Carriers Kinetic Characteristics
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- Guo, Pengzhi (author)
- Lanzhou Jiaotong University
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- Miao, Wentao (author)
- Lanzhou Jiaotong University
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- Liu, Guanghong (author)
- South China University of Technology
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- Tong, Junfeng (author)
- Lanzhou Jiaotong University
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- Liang, Quanbin (author)
- South China University of Technology
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- Zhang, Youdan (author)
- Lanzhou Jiaotong University
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- Li, Miaomiao (author)
- Tianjin University
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- Li, Jianfeng (author)
- Lanzhou Jiaotong University
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- Wang, Chenglong (author)
- Lanzhou Jiaotong University
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- Wang, Ergang, 1981 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Lanzhou Jiaotong University
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- Wu, Hongbin (author)
- South China University of Technology
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- Xia, Yangjun (author)
- Lanzhou Jiaotong University
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(creator_code:org_t)
- 2021-04-28
- 2021
- English.
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In: Macromolecular Chemistry and Physics. - : Wiley. - 1022-1352 .- 1521-3935. ; 222:12
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Abstract
Subject headings
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- Alternating conjugated polymers (CPs), derived from 2-ethylhexylthiothiophen-2-yl (TS) or 2-ethylhexylthiophen-2-yl (T) flanked dithieno[3,2-d:3,2-d ']benzo[1,2-b:4,5-b ']dithiophene (DTBDT) and diketopyrrolo-pyrrole (DPP) termed as PDTBDT-TS-DPP and PDTBDT-T-DPP, are prepared and characterized. It is found that the PDTBDT-TS-DPP not only exhibits slightly deepening the highest occupied molecular orbital energy levels, and similar absorption, etc., but also presents higher dielectric constant (epsilon(r)) of 6.7 at 1 kHz in contrast to 3.2 for PDTBDT-T-DPP, which are even higher than those of 4.3 and 3.0 for PBDT-TS-DPP/PBDT-T-DPP generated from TS and T flanked benzo[1,2-b:4,5-bMODIFIER LETTER PRIME]dithiophene and DPP. Beyond that, the power conversion efficiency of 8.17% for the inverted photovoltaic devices from DPP-based CPs, is achieved from PDTBDT-TS-DPP. The alkylthio side chains are used in the DTBDT of the larger twisting angles of TS flanks and longer conjugation length, synergistically contribute to the highest dipole moments, and then lead to the enhancement of epsilon(r), thus devoted the modification exciton dissociation and charge carriers kinetic characteristics. To the authors' knowledge, it is the first time to report that epsilon(r) of the CPs is connected with the twisting angle of flanks and conjugation length of the building blocks, besides the use of functional side chains and atoms.
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Teoretisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Theoretical Chemistry (hsv//eng)
Keyword
- dielectric constants
- conjugation lengths
- carrier kinetics
- twisted angles
- dithieno[3,2-b:3 ',2 ',-b ']benzo[1,2-b:4,5-b ']dithiophene
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Guo, Pengzhi
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Miao, Wentao
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Liu, Guanghong
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Tong, Junfeng
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Liang, Quanbin
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Zhang, Youdan
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show more...
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Li, Miaomiao
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Li, Jianfeng
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Wang, Chenglong
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Wang, Ergang, 19 ...
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Wu, Hongbin
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Xia, Yangjun
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Physical Chemist ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Other Physics To ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Theoretical Chem ...
- Articles in the publication
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Macromolecular C ...
- By the university
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Chalmers University of Technology