Getting to the Heart of the Matter: Control over the Photolysis of PbI<sub>2</sub> Through Partial Lead Substitution
A crucial problem of the photoinduced degradation of perovskite semiconductors based on complex lead halides has been addressed here by suppressing PbI<sub>2</sub> photolysis to metallic lead. The systematic screening of >30 modifying cations introduced as substituents for 5% of Pb<...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
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| Series: | Inorganics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-6740/13/1/13 |
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| Summary: | A crucial problem of the photoinduced degradation of perovskite semiconductors based on complex lead halides has been addressed here by suppressing PbI<sub>2</sub> photolysis to metallic lead. The systematic screening of >30 modifying cations introduced as substituents for 5% of Pb<sup>2+</sup> in the PbI<sub>2</sub> composition has revealed their tremendous effects on the rate of material degradation under light exposure. Thus, the most successful stabilizing cations could maintain a high absorbance of the Pb<sub>0.95</sub>M<sub>0.1/n</sub>I<sub>2</sub> films and block Pb<sup>0</sup> formation after 400 h of continuous illumination, when the non-modified PbI<sub>2</sub> films completely decomposed to Pb<sup>0</sup> and I<sub>2</sub>. The obtained results present a promising solution for the problem of metallic lead formation in the active layer of perovskite solar cells during their operation, which can pave the way for the development of a new generation of highly efficient and stable perovskite photovoltaics. |
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| ISSN: | 2304-6740 |