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A Ferrocene Capping Layer Enabling Highly Efficient and Stable Sn–Pb Mixed Perovskite Solar Cells.
- Source :
- Solar RRL; Apr2024, Vol. 8 Issue 8, p1-7, 7p
- Publication Year :
- 2024
-
Abstract
- The Sn–Pb mixed perovskite with a narrow bandgap is essential for the construction of all‐perovskite tandem solar cells. However, the oxidation of Sn2+ to Sn4+ makes the fabrication of Sn–Pb perovskite solar cells (PSCs) challenging. Herein, a ferrocene (Fc) capping layer is introduced on the surface of Sn–Pb mixed perovskite to maintain a reducing environment. This is due to a strong electron supply capacity from the π‐orbitals in cyclopentadiene in Fc, which effectively suppresses the oxidation of Sn2+, reduces the defect density, and leads to an improvement in carrier lifetime. Therefore, the Fc capping layer significantly improves the power conversion efficiency (PCE) of single‐junction Sn–Pb PSCs from 17.49% to 21.02%. It maintains 87% of its initial PCE after light exposure at 1 sun condition in N2 atmosphere for 288 h, demonstrating good long‐term stability. The strategy outlined herein offers a straightforward and efficient approach to enhance the stability and PCE of narrow‐bandgap Sn–Pb mixed PSCs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 2367198X
- Volume :
- 8
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Solar RRL
- Publication Type :
- Academic Journal
- Accession number :
- 176870410
- Full Text :
- https://doi.org/10.1002/solr.202400035