Abstract
A semicrystalline low-bandgap polymer (PDTPBT) based on alternating dithienopyrrole and benzothiadiazole moieties as a pair of the indene-C 60 bisadduct (ICBA) for polymeric solar cells is reported. The lowest unoccupied molecular orbital (LUMO) level of PDTPBT is measured to be -3.47 eV, ensuring sufficient energy offset for photoinduced charge transfer to ICBA. Photovoltaic cells are fabricated with ICBA and [6,6]-phenyl-C 71-butyric acid methyl ester (PC71BM) as an acceptor. By replacing PC71BM with ICBA, the open-circuit voltage is increased by 0.23 V and the resulting power conversion efficiency is improved from 1.17% to 1.71%. To optimize the ICBA-based devices, crystalline low-bandgap structures should be designed carefully as a pair of ICBA by considering the energy-level offset for charge separation and crystalline interchain ordering, for minimizing the intercalated ICBAs inside the polymer domain. A semicrystalline copolymer based on dithienopyrrole and benzothiadiazole is investigated as an active layer with the indene-C60 bisadduct (ICBA) for photovoltaic devices. A low-bandgap structure should be carefully designed as a pair of ICBA by considering the energy level offset for exciton separation and crystalline ordering for minimizing the intercalated ICBAs inside the polymer domain.
| Original language | English |
|---|---|
| Pages (from-to) | 2083-2090 |
| Number of pages | 8 |
| Journal | Macromolecular Chemistry and Physics |
| Volume | 214 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - 2013 Sep 1 |
| Externally published | Yes |
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Keywords
- charge transfer
- dithienopyrrole
- indene-C60 bisadduct (ICBA)
- polymer solar cells
- wide-angle X-ray scattering (WAXS)
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Polymers and Plastics
- Organic Chemistry
- Materials Chemistry
Cite this
Dithieno[3,2-b:2′,3′-d]pyrrole and benzothiadiazole-based semicrystalline copolymer for photovoltaic devices with indene-C60 Bisadduct. / Lee, Wonho; Kim, Gi Hwan; Jeong, Eunjae; Wang, Xiaowei; Yum, Seungjib; Ko, Seo Jin; Hwang, Sungu; Kim, Jin Young; Woo, Han Young.
In: Macromolecular Chemistry and Physics, Vol. 214, No. 18, 01.09.2013, p. 2083-2090.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Dithieno[3,2-b:2′,3′-d]pyrrole and benzothiadiazole-based semicrystalline copolymer for photovoltaic devices with indene-C60 Bisadduct
AU - Lee, Wonho
AU - Kim, Gi Hwan
AU - Jeong, Eunjae
AU - Wang, Xiaowei
AU - Yum, Seungjib
AU - Ko, Seo Jin
AU - Hwang, Sungu
AU - Kim, Jin Young
AU - Woo, Han Young
PY - 2013/9/1
Y1 - 2013/9/1
N2 - A semicrystalline low-bandgap polymer (PDTPBT) based on alternating dithienopyrrole and benzothiadiazole moieties as a pair of the indene-C 60 bisadduct (ICBA) for polymeric solar cells is reported. The lowest unoccupied molecular orbital (LUMO) level of PDTPBT is measured to be -3.47 eV, ensuring sufficient energy offset for photoinduced charge transfer to ICBA. Photovoltaic cells are fabricated with ICBA and [6,6]-phenyl-C 71-butyric acid methyl ester (PC71BM) as an acceptor. By replacing PC71BM with ICBA, the open-circuit voltage is increased by 0.23 V and the resulting power conversion efficiency is improved from 1.17% to 1.71%. To optimize the ICBA-based devices, crystalline low-bandgap structures should be designed carefully as a pair of ICBA by considering the energy-level offset for charge separation and crystalline interchain ordering, for minimizing the intercalated ICBAs inside the polymer domain. A semicrystalline copolymer based on dithienopyrrole and benzothiadiazole is investigated as an active layer with the indene-C60 bisadduct (ICBA) for photovoltaic devices. A low-bandgap structure should be carefully designed as a pair of ICBA by considering the energy level offset for exciton separation and crystalline ordering for minimizing the intercalated ICBAs inside the polymer domain.
AB - A semicrystalline low-bandgap polymer (PDTPBT) based on alternating dithienopyrrole and benzothiadiazole moieties as a pair of the indene-C 60 bisadduct (ICBA) for polymeric solar cells is reported. The lowest unoccupied molecular orbital (LUMO) level of PDTPBT is measured to be -3.47 eV, ensuring sufficient energy offset for photoinduced charge transfer to ICBA. Photovoltaic cells are fabricated with ICBA and [6,6]-phenyl-C 71-butyric acid methyl ester (PC71BM) as an acceptor. By replacing PC71BM with ICBA, the open-circuit voltage is increased by 0.23 V and the resulting power conversion efficiency is improved from 1.17% to 1.71%. To optimize the ICBA-based devices, crystalline low-bandgap structures should be designed carefully as a pair of ICBA by considering the energy-level offset for charge separation and crystalline interchain ordering, for minimizing the intercalated ICBAs inside the polymer domain. A semicrystalline copolymer based on dithienopyrrole and benzothiadiazole is investigated as an active layer with the indene-C60 bisadduct (ICBA) for photovoltaic devices. A low-bandgap structure should be carefully designed as a pair of ICBA by considering the energy level offset for exciton separation and crystalline ordering for minimizing the intercalated ICBAs inside the polymer domain.
KW - charge transfer
KW - dithienopyrrole
KW - indene-C60 bisadduct (ICBA)
KW - polymer solar cells
KW - wide-angle X-ray scattering (WAXS)
UR - http://www.scopus.com/inward/record.url?scp=84884498601&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84884498601&partnerID=8YFLogxK
U2 - 10.1002/macp.201300303
DO - 10.1002/macp.201300303
M3 - Article
VL - 214
SP - 2083
EP - 2090
JO - Macromolecular Chemistry and Physics
JF - Macromolecular Chemistry and Physics
SN - 1022-1352
IS - 18
ER -