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Indoor photovoltaic devices have garnered profound research attention in recent years due to their prospects of powering 'smart' electronics for the Internet of Things (IoT). Here it is shown that all-inorganic Cs-based halide perovskites are promising for indoor light harvesting due to their wide bandgap matched to the indoor light spectra. Highly crystalline and compact CsPbIBr2 perovskite based photovoltaic devices have demonstrated a power conversion efficiency (PCE) of 14.1% under indoor illumination of 1000 lux and 5.9% under 1 Sun. This study revealed that a reduction in grain misorientation, as well as suppression of defects in the form of metallic Pb in the perovskite film are crucial for maximising the photovoltaic properties of CsPbIBr2 based devices. It was demonstrated that a pinhole free CsPbIBr2/Spiro-OMeTAD interface preserves the perovskite alpha phase and enhances the air stability of the CsPbIBr2 devices. These devices, despite being unencapsulated, retained >55% of the maximum PCE even when stored under 30% relative humidity for a shelf-life duration of 40 days and is one of the best stability data reported so far for CsPbIBr2 devices.
|Number of pages||28|
|Journal||Applied Surface Science|
|Early online date||6 Apr 2022|
|Publication status||Published - 1 Aug 2022|
- all-inorganic perovskite
- grain misorientation
- Internet of Things (IoT)
- mixed halides
FingerprintDive into the research topics of 'Crystalline grain engineered CsPbIBr2 films for indoor photovoltaics'. Together they form a unique fingerprint.
- 1 Finished
Quantitative non-destructive nanoscale characterisation of advanced materials
Hourahine, B., Edwards, P., Roper, M., Trager-Cowan, C. & Gunasekar, N.
EPSRC (Engineering and Physical Sciences Research Council)
1/06/17 → 30/11/21
Data for: "Crystalline grain engineered CsPbIBr2 films for indoor photovoltaics"
Ghosh, P. (Creator), Bruckbauer, J. (Creator), Trager-Cowan, C. (Creator) & Krishnan Jagadamma, L. (Creator), University of St Andrews, 8 Dec 2022