Naphtho[2,1-b:3,4-b ']dithiophene-based Bulk Heterojunction Solar Cells: How Molecular Structure Influences Nanoscale Morphology and Photovoltaic Properties
SCIE
SCOPUS
- Title
- Naphtho[2,1-b:3,4-b ']dithiophene-based Bulk Heterojunction Solar Cells: How Molecular Structure Influences Nanoscale Morphology and Photovoltaic Properties
- Authors
- Kim, YJ; Cheon, YR; Back, JY; Kim, YH; Chung, DS; Park, CE
- Date Issued
- 2014-11-10
- Publisher
- WILEY-V C H VERLAG GMBH
- Abstract
- Organic bulk heterojunction photovoltaic devices based on a series of three naphtho[2,1-b:3,4-b']dithiophene (NDT) derivatives blended with phenyl-C-71-butyric acid methyl ester were studied. These three derivatives, which have NDT units with various thiophene-chain lengths, were employed as the donor polymers. The influence of their molecular structures on the correlation between their solar-cell performances and their degree of crystallization was assessed. The grazing-incidence angle X-ray diffraction and atomic force microscopy results showed that the three derivatives exhibit three distinct nanoscale morphologies. We correlated these morphologies with the device physics by determining the J-V characteristics and the hole and electron mobilities of the devices. On the basis of our results, we propose new rules for the design of future generations of NDT-based polymers for use in bulk heterojunction solar cells.
- Keywords
- bulk heterojunction; nanoscale morphology; organic solar cells; polymers; X-ray diffraction; CONVERSION EFFICIENCY; PERFORMANCE; COPOLYMER; POLYMERS; DESIGN; SYSTEM
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/14110
- DOI
- 10.1002/CPHC.201402295
- ISSN
- 1439-4235
- Article Type
- Article
- Citation
- CHEMPHYSCHEM, vol. 15, no. 16, page. 3626 - 3633, 2014-11-10
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