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Advanced Characterization of Perovskite Thin Films for Solar Cell Applications Using Time‐Resolved Microwave Photoconductivity and Time‐Resolved Photoluminescence
Small Methods
Swansea University Authors:
Emmanuel Pean, Rodrigo Garcia Rodriguez, Matthew Davies
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© 2025 The Author(s). This is an open access article under the terms of the Creative Commons Attribution License.
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DOI (Published version): 10.1002/smtd.202400818
Abstract
Thanks to their direct band-gap, high absorption coefficient, low manufacturing cost, and relative abundance of component materials, perovskite materials are strong candidates for the next generation of photovoltaic devices. However, their complex photochemistry and photophysics are hindering their...
| Published in: | Small Methods |
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| ISSN: | 2366-9608 2366-9608 |
| Published: |
Wiley
2025
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa68305 |
| Abstract: |
Thanks to their direct band-gap, high absorption coefficient, low manufacturing cost, and relative abundance of component materials, perovskite materials are strong candidates for the next generation of photovoltaic devices. However, their complex photochemistry and photophysics are hindering their development. This is due, in part, to the complex charge carrier recombination pathways in these materials, as well as their instability during measurements. Here, a new characterization methodology is detailed that allows the measurement, with high certainty, of the intrinsic parameters of a single perovskite sample, such as the trap state concentration and carrier mobilities. This methodology is based on a combination of time-resolved microwave photoconductivity (TRMC) and time-resolved photoluminescence (TRPL) spectroscopy. Compared to TRPL only, this methodology is faster, does not lead to significant changes in the perovskite properties over time, and increases the certainty of the parameters retrieved. Using this methodology, green solvent systems are studied to replace the traditional harmful solvents usually used when spin–coating perovskites. Although devices made using the greener solvents presented lower efficiencies, TRMC and TRPL measurements highlighted that the perovskites made with these solvents can achieve the same performance compared to the traditional solvent system. |
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| Keywords: |
perovskite; solar cells; TRPL; TRMC |
| College: |
Faculty of Science and Engineering |
| Funders: |
Engineering and Physical Sciences Research Council - EP/W019167/1; EP/X025217/1; EP/S001336/1; EP/N020863/1; EP/X035026/1;
European Regional Development Fund - c80892 Innovate UK - 920036 |