Imaging the Spatial Evolution of Degradation in Perovskite/Si Tandem Solar Cells After Exposure to Humid Air

Monolithically integrated two-terminal perovskite/Si tandem solar cells promise to achieve high power conversion efficiency. However, there is a concern that the stability of the perovskite top cell will limit the long-term performance of tandem devices. To investigate the impact of perovskite cell degradation on the photocurrent generation and collection in the individual subcells, we employed light beam induced current mapping to spatially resolve the photocurrent under controlled humidity conditions. The evolution of the device behavior is consistent with the formation of an optically transparent hydrated perovskite phase that allows the bottom Si cell to continue to generate photocurrent at the probing wavelength (532 nm). Additional measurements were performed on perovskite thin films on glass substrates to verify the interpretation.


Published in:
Ieee Journal Of Photovoltaics, 7, 6, 1563-1568
Year:
2017
Publisher:
Piscataway, Ieee-Inst Electrical Electronics Engineers Inc
ISSN:
2156-3381
Keywords:
Note:
IMT Number : 883
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2017-12-04, last modified 2018-09-13

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