Ternary blends to achieve well-developed nanoscale morphology in organic bulk heterojunction solar cells
SCIE
SCOPUS
- Title
- Ternary blends to achieve well-developed nanoscale morphology in organic bulk heterojunction solar cells
- Authors
- Cha, H.; Park, C.E.; Kwon, S.-K.; An, T.K.
- Date Issued
- 2017-06
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- Two alkoxynaphthalene-based conjugated polymers, poly((5,5-E-alpha-((2-thienyl)methylene)-2-thiophene)-alt-2,6-[(1,5-didecyloxy)naphthalene])) (PBTDN) and poly((5,5-E-alpha-((2-thienyl)methylene)-2-thiopheneacetonitrile)-alt-2,6-[(1,5-didecyloxy)naphthalene])) (PBTADN), are used as second electron donor materials in a poly(4,8-bis-(2-ethylhexyloxy)-benzo(1,2-b:4,5-b��)dithiophene-2,6-diyl-alt-(4-(2-ethylhexyloyl)-thieno(3,4-b)thiophene))-2,6-diyl):[6,6]-phenyl-C71-butyric acid methyl ester (PBDTTT-C: PC71BM) binary blend for organic ternary solar cells. The PBTADN:PBDTTT-C:PC71BM blends yields complementary absorption spectra as well as a better molecular structure ordering and more balanced charge mobility, which together provided excellent charge transport properties with reduced recombination compared to the PBTDN:PBDTTT-C: PC71BM blends. The optimized PBTADN:PBDTTT-C: PC71BM blend solar cells yield higher fill factor (FF) values and better efficiencies compared to the PBDTTT-C: PC71BM binary blend solar cells. The best photovoltaic performances in the PBTADN:PBDTTT-C:PC71BM blend solar cells are characterized by a current density (JSC) of 16.3?mAcm?2, an open circuit voltage (VOC) of 0.73?V, a FF of 53.3%, and a power conversion efficiency (PCE) of 6.9% under AM1.5G illumination. The use of a processing additive, 3?vol% of 1,3-diiodopropane (DIP), increases the PCEs of the organic ternary solar cells to values as high as 7.2% with a high FF of 59.1%. ? 2017 Elsevier B.V.
- Keywords
- Bins; Butyric acid; Carrier transport; Charge carriers; Charge transfer; Conjugated polymers; Efficiency; Heterojunctions; Morphology; Nanostructured materials; Naphthalene; Open circuit voltage; Organic polymers; Organic solar cells; Polymer solar cells; Solar power generation; Solubility; Thiophene; Based conjugated polymers; Charge mobilities; Nanoscale morphology; Organic bulk-heterojunction solar cells; Photovoltaic performance; Power conversion efficiencies; Second electrons; Ternary blends; Solar cells
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/92089
- DOI
- 10.1016/j.orgel.2017.03.028
- ISSN
- 1566-1199
- Article Type
- Article
- Citation
- ORGANIC ELECTRONICS, vol. 45, page. 263 - 272, 2017-06
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