Tin based perovskites have low toxicity and near ideal band gap; due to these properties, they can be used to fabricate lead free environment friendly photovoltaic cells. Only drawback with these perovskites is their poor stability and reproducibility (due to instant oxidation of Sn2+ to Sn4+, even in nitrogen atmosphere) , what are the best solutions to enhance their stability as well as reproducibility?
Dear Hassan,
welcome,
please refer to the science news:
Perovskite solar cells leap toward commercialization in the site:Article Gas-solid reaction based over one-micrometer thick stable pe...about the most advanced technology on perovskite solar cells. The researchers used gas solid techniques to form 1 um thick perovskite layer which they found to be stable for long time.
Best wishes
Hi, you may try the method used in article attached in this news: https://www.realclearscience.com/quick_and_clear_science/2019/04/25/caffeine_boosts_perovskite_solar_cells.html
Basically they add in caffeine to improve its stability to 1300 h:
" For MAI.PbI2.DMSO and MA.$PbI2.DMSO.caffeine adducts,1 mmol of PbI2, MAI, and DMSO with or without 6 mg caffeine were dissolved in 600 mL of DMF, to which 10 mL of diethyl ether was added to precipitate the corresponding adduct. The precipitates were collected and dried under vacuum. "
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