Abstract
Lead-free solution-processed solid-state photovoltaic devices based on formamidinium tin triiodide (FASnI3) and cesium tin triiodide (CsSnI3) perovskite semiconductor as the light harvester are reported. In this letter, we used solvent engineering and anti-solvent dripping method to fabricate perovskite films. SnCl2 was used as an inhibitor of Sn4+ in FASnI3 precursor solution. We obtained the best films under the function of toluene or chlorobenzene in anti-solvent dripping method and monitored the oxidation of FASnI3 films in air. We chose SnF2 as an additive of CsSnI3 precursor solution to prevent the oxidation of the Sn2+, improving the stability of CsSnI3. The experimental results we obtained can pave the way for lead-free tin-based perovskite solar cells (PSCs).
Original language | English |
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Article number | 367 |
Journal | Nanoscale Research Letters |
Volume | 12 |
Issue number | 1 |
DOIs | |
State | Published - 2017 |
Bibliographical note
Publisher Copyright:© 2017, The Author(s).
Keywords
- Anti-solvent dripping
- Lead-free perovskite solar cells
- Solvent engineering
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics