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Direct observation of charge transfer at the interface between PEDOT:PSS and perovskite layers
- Source :
- Applied Physics Express. 12:041002
- Publication Year :
- 2019
- Publisher :
- IOP Publishing, 2019.
-
Abstract
- Although the interface between poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and perovskite layers is one of the key factors to determine the open-circuit voltage of inverted perovskite solar cells, this interface remains poorly understood. We investigated the interface by electron spin resonance spectroscopy and found that the PEDOT undergoes dedoping in contact with the perovskite. The holes in PEDOT were reduced by electron transfer from the perovskite. Additional electron transfer occurred upon light irradiation. The electron transfer would be related to lower open-circuit voltages of the inverted structure compared to those of mesoporous and planar structures.
- Subjects :
- 010302 applied physics
Materials science
business.industry
General Engineering
General Physics and Astronomy
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
law.invention
Electron transfer
Planar
PEDOT:PSS
law
0103 physical sciences
Optoelectronics
0210 nano-technology
Mesoporous material
Electron paramagnetic resonance
business
Spectroscopy
Voltage
Perovskite (structure)
Subjects
Details
- ISSN :
- 18820786 and 18820778
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Applied Physics Express
- Accession number :
- edsair.doi...........873bec06fc1aaba381ab1b68f846a13b