Buried interface engineering drives advances in tin-lead perovskite photo voltaic cell effectivity
by Simon Mansfield
Sydney, Australia (SPX) Dec 20, 2024
A group led by Prof. Meng Li from Henan College’s Faculty of Nanoscience and Supplies Engineering has unveiled an progressive strategy to overcoming stability and effectivity challenges in tin-lead (Sn-Pb) perovskite photo voltaic cells. The researchers’ work focuses on optimizing the buried hole-selective interface utilizing a specifically designed self-assembled materials, providing main implications for single-junction and tandem photo voltaic cell applied sciences.
Tin-lead perovskites are valued for his or her slim bandgap properties, which place them as key supplies for producing high-efficiency photo voltaic cells. Nonetheless, power stage mismatches and degradation on the buried interface have constrained each their efficiency and long-term stability. Addressing these points, Prof. Meng’s group designed a boronic acid-anchored hole-selective contact materials, 4-(9H-carbazole-9-yl)phenylboronic acid (4PBA).
In comparison with standard supplies, 4PBA demonstrated superior stability and compatibility on the substrate floor. Its excessive adsorption power of -5.24 eV and vital molecular dipole second (4.524 D) improved power stage alignment between the substrate and perovskite layer, facilitating environment friendly cost extraction. Moreover, the interface engineered utilizing 4PBA improved perovskite crystallization and substrate contact, decreasing defects and non-radiative recombination.
These developments enabled Sn-Pb perovskite photo voltaic cells incorporating 4PBA to attain an influence conversion effectivity (PCE) of 23.45%. The fabric’s decreased corrosiveness additionally mitigated the degradation results sometimes attributable to PEDOT:PSS, a broadly used hole-transport materials, enhancing chemical stability and storage sturdiness. The cells retained 93.5% of their preliminary effectivity after 2,000 hours of shelf storage.
“This strategy affords a sensible path to enhancing each the effectivity and stability of Sn-Pb perovskite photo voltaic cells, addressing power stage mismatches and interfacial stability considerations,” the analysis group commented.
The findings present a basis for advancing environment friendly and steady Sn-Pb perovskite photo voltaic cells and spotlight the significance of interface engineering in next-generation photovoltaic applied sciences.
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Henan College
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