Suppression of bimolecular recombination by UV-sensitive electron transport layers in organic solar cells
- Suppression of bimolecular recombination by UV-sensitive electron transport layers in organic solar cells
- 고두현; John R. Tumbleston; Myoung-Ryul Ok; Honggu Chun; Rene Lopez; Edward Samulski
- Issue Date
- Journal of applied physics
- VOL 108, NO 8, 083101-1-083101-6
- Incorporating UV-sensitive electron transport layers ( ETLs) into organic bulk heterojunction ( BHJ ) photovoltaic devices dramatically impacts short-circuit current ( Jsc) and fill factor characteristics. Resistivity changes induced by UV illumination in the ETL of inverted BHJ devices suppress
bimolecular recombination producing up to a two orders of magnitude change in Jsc. Electro-optical modeling and light intensity experiments effectively demonstrate that bimolecular recombination, in the form of diode current losses, controls the extracted photocurrent and is directly dependent on the ETL resistivity.
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