Journal
ADVANCED MATERIALS
Volume 30, Issue 9, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201705176
Keywords
argon plasma; perovskites; photodetectors; solar cells
Categories
Funding
- Air Force Office of Scientific Research (AFOSR) [A9550-16-1-0299]
- National Science Foundation (NSF) through the Nebraska Materials Research Science and Engineering Center (MRSEC) [DMR-1420645]
- NSF EPSCoR Track II grant [OIA-1538893]
- Office of Integrative Activities
- Office Of The Director [1538893] Funding Source: National Science Foundation
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The surface composition of perovskite films is very sensitive to film processing and can deviate from the optimal, which generates unfavorable defects and results in efficiency loss in solar cells and slow response speed in photodetectors. An argon plasma treatment is introduced to modify the surface composition by tuning the ratio of organic and inorganic components as well as defect type before deposition of the passivating layer. It can efficiently enhance the charge collection across the perovskite-electrode interface by suppressing charge recombination. Therefore, perovskite solar cells with argon plasma treatment yield enhanced efficiency to 20.4% and perovskite photodetectors can reach their fastest respond speed, which is solely limited by the carrier mobility.
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