High-performance fully-ambient air processed perovskite solar cells using solvent additive
Incredible progress in the efficiency of hybrid perovskite solar cells (PSCs) has nominated perovskites as a promising light-harvesting for new-generation photovoltaic devices. Additive engineering in PSCs is a valid and straightforward method to increase the surface quality of perovskite films. Her...
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Veröffentlicht in: | The Journal of physics and chemistry of solids 2021-02, Vol.149, p.109792, Article 109792 |
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Sprache: | eng |
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Zusammenfassung: | Incredible progress in the efficiency of hybrid perovskite solar cells (PSCs) has nominated perovskites as a promising light-harvesting for new-generation photovoltaic devices. Additive engineering in PSCs is a valid and straightforward method to increase the surface quality of perovskite films. Herein, we prepared mixed cation of cesium (Cs)/formamidinium (FA)/methylammonium (MA) PSCs via an air-processed sequential deposition method. Acetonitrile (ACN) was used as an effective additive to improve the surface properties of perovskite layer. Our measurements demonstrated that with the incorporation of ACN in the FAI/MABr/MACl precursor surface defects on the perovskite film well passivated, and consequently, crystal grain size increased. A PCE of 15.64% was achieved for ACN-based PSCs higher than of 13.06% one for without additive devices. Additionally, ACN-containing devices showed a lower hysteresis effect as compared to the control devices. Most importantly, ACN additive based PSCs showed more stable behavior in ambient air, thermal, and humidity stability tests. This work introduces a simple approach for the fabrication of high-performance perovskite materials in ambient air.
•Acetonitrile additive improves the performance of air-processed PSCs.•Acetonitrile additive passivates the grain boundaries of perovskite film.•Acetonitrile suppresses non-radiative recombination in perovskite film.•Unencapsulated acetonitrile-based PSCs show more stable behavior. |
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ISSN: | 0022-3697 1879-2553 |
DOI: | 10.1016/j.jpcs.2020.109792 |