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Published TCIMAIL newest issue No.197
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Surface Treatment Agent for High Quality Sn-Pb Perovskite Thin Films
Maltol, known as a flavor enhancer, has a bidentate chelating site. Because of the noteworthy metal chelating ability of maltol, a fabrication method of high-quality Sn-Pb perovskite thin films by surface treatment with maltol solution was reported. 1) Sn-Pb perovskite has attracted attention as a promising material for solar cells with the near-infrared band gap, however the defects caused by oxidation of Sn(II) degrade performance.2) On the other hand, maltol forms a stable complex with Sn(II), which suppresses oxidation of Sn(II) and reduces the density of defects at the perovskite film surface. Maltol-treated Sn-Pb perovskite thin film showed a long photoluminescence lifetime of 7.4 μs compared to 3.7 μs for untreated films in terms of time-resolved fluorescence measurement. The high-power conversion efficiency of 21.4% (JSC = 33.1 mA/cm2, VOC = 0.82 V, FF = 0.79) was achieved for these maltol-treated perovskite solar cells.
Related Products
- T3449
- Tin(II) Iodide [for Perovskite precursor]
- T3573
- Tin(II) Bromide [for Perovskite precursor]
- L0279
- Lead(II) Iodide (99.99%, trace metals basis) [for Perovskite precursor]
- B2694
- Bathocuproine (purified by sublimation)
- F1232
- Fullerene C60 (purified by sublimation) [for organic electronics]
References
- 1) Mixed lead–tin perovskite films with >7 μs charge carrier lifetimes realized by maltol post-treatment
- 2) Optoelectronic Properties of Tin–Lead Halide Perovskites
