期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 41, 页码 49096-49103出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c15251
关键词
organic photovoltaics; cathodic interlayer; perylene diimide; slot-die coating; green solution processing
资金
- CFI JELF [34102]
- University of Calgary
- Canada First Research Excellence Fund (CFREF)
- National Science Foundation [DGE-1735173, DMR-2003631]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DEAC02-76SF00515]
In this study, perylene diimide films were successfully formed from green solvents for use as electron transporting layers in inverted-type organic photovoltaics. Functionalized PDIN-H films showed improved device power conversion efficiency when used to modify the surface of ZnO in air-processed and tested inverted-type organic photovoltaics.
In this work, we report the formation of perylene diimide films, from green solvents, for use as electron transporting layers, when combined with ZnO, in inverted-type organic photovoltaics. A modified N-annulated PDI was functionalized with a tert-butyloxycarbonyl protecting group to solubilize the material, enabling solution processing from green solvents. Post-deposition treatment of films via thermal annealing cleaves the protecting group yielding the known PDIN-H material, rendering films solventresistant. The PDIN-H films were characterized by optical absorption spectroscopy, contact angle measurements, and atomic force microscopy. When used to modify the surface of ZnO in inverted-type organic photovoltaics (air-processed and tested) based on the PM6:Y6 and PTQ10:Y6 bulk-heterojunctions, the device power conversion efficiency increases from 9.8 to 11.0% and 7.2 to 9.8%, respectively.
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