DTBDT-TTPD: a new dithienobenzodithiophene-based small molecule for use in efficient photovoltaic devices
SCIE
SCOPUS
- Title
- DTBDT-TTPD: a new dithienobenzodithiophene-based small molecule for use in efficient photovoltaic devices
- Authors
- Cheon, YR; Kim, YJ; Back, JY; An, TK; Park, CE; Kim, YH
- Date Issued
- 2014-10-21
- Publisher
- ROYAL SOC CHEMISTRY
- Abstract
- We designed and synthesized a dithienobenzodithiophene (DTBDT)-based molecule with a planar molecular geometry, DTBDT-TTPD, for the fabrication of solution-processable organic solar cells (OSCs). DTBDT-TTPD exhibited both a low optical band gap of 1.88 eV and a low-lying highest occupied molecular orbital (HOMO) energy level of -5.61 eV, indicating that DTBDT-TTPD is a promising electron donor for use in OSCs. OSCs prepared with DTBDT-TTPD as the electron donor and 16,6]-phenyl-C-71-butyric acid methyl ester (PC71BM) as the electron acceptor were fabricated. An optimized power conversion efficiency of 4.98% with a high short circuit current of 10.6 mA cm(-2) was achieved after finely tuning the morphology through an annealing step. These results indicate that DTBDT-TTPD is an effective compound for producing very promising characteristics in small-molecule solar cell devices.
- Keywords
- HETEROJUNCTION SOLAR-CELLS; LOW-BANDGAP POLYMER; CONJUGATED POLYMERS; BULK; PERFORMANCE; DIKETOPYRROLOPYRROLE; COPOLYMER; ACCEPTOR; DESIGN
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/14108
- DOI
- 10.1039/C4TA03745F
- ISSN
- 2050-7488
- Article Type
- Article
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, vol. 2, no. 39, page. 16443 - 16451, 2014-10-21
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