Journal
MATTER
Volume 5, Issue 7, Pages -Publisher
CELL PRESS
DOI: 10.1016/j.matt.2022.05.024
Keywords
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Categories
Funding
- European Union [763989]
- project UNIQUE
- ANR
- PtJ
- MIUR
- MINECOAEI
- SWEA
- European Commission [691664]
- German Ministry of Economic Affairs and Climate Action under the project PoTaSi [0324247]
- German Federal Environmental Foundation (DBU)
- German Academic Exchange Service (DAAD)
- H2020 Societal Challenges Programme [763989] Funding Source: H2020 Societal Challenges Programme
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This paper presents a method for real-time assessment of solar cell performance using voltage-dependent photoluminescence microscopy. The proposed method allows for the determination of microscopically resolved J(V) curves and provides information on charge extraction and interfacial recombination, enabling the identification of non-ideal charge extraction regions and improvements in solar cells.
The photocurrent density-voltage (J(V)) curve is the fundamental characteristic to assess opto-electronic devices, in particular solar cells. However, it only yields information on the performance inte-grated over the entire active device area. Here, a method to deter-mine spatially resolved photocurrent images by voltage-dependent photoluminescence microscopy is derived from basic principles. The opportunities and limitations of the approach are studied by the investigation of III-V and perovskite solar cells. This approach allows the real-time assessment of the microscopically resolved local J(V) curve and the steady-state Jsc as well as transient effects. In addi-tion, the measurement contains information on local charge extrac-tion and interfacial recombination. This facilitates the identification of regions of non-ideal charge extraction and enables linking these to the processing conditions. The proposed technique highlights that, combined with potentiostatic measurements, luminescence microscopy can be a powerful tool for the assessment of perfor-mance losses and the improvement of solar cells.
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