Homo-tandem structures to achieve the ideal external quantum efficiency in small molecular organic solar cells

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In this study, we report a homo-tandem structure of small molecular organic solar cells (SMOSCs) using identical single-junction devices as sub-cells. The trade-off between the absorption and internal quantum efficiency (IQE) of single-junction devices tends to limit the external quantum efficiency (EQE). However, multiple-stacked thin cells with maximized IQE in homo-tandem structures amplify the absorption to achieve the ideal EQE. As a result, a high power conversion efficiency of 7.81% is achieved in tetraphenyldibenzoperiflanthene (DBP): C-70-based homo-tandem SMOSCs, which is 21.8% higher than that in a single-junction device. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Publisher
OPTICAL SOC AMER
Issue Date
2018-07
Language
English
Article Type
Article
Citation

OPTICS EXPRESS, v.26, no.14, pp.A697 - A708

ISSN
1094-4087
DOI
10.1364/OE.26.00A697
URI
http://hdl.handle.net/10203/244863
Appears in Collection
EEW-Journal Papers(저널논문)
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