Journal
CHEMISTRY LETTERS
Volume 49, Issue 1, Pages 87-90Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/cl.190692
Keywords
Perovskite solar cells; Fluorinated polymer; Surface passivation
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Funding
- Japan Society for the Promotion of Science (JSPS) [17K06341]
- Grants-in-Aid for Scientific Research [17K06341] Funding Source: KAKEN
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We report the fabrication of self-assembled surface-passivated [CH(NH2)(2)](0.8)Cs0.2PbI3 thin films using a one-step method with a fluorinated polymer (FP) as an additive without post-treatment. The FP phase is separated and aggregated at the top surface of the perovskite layer during film formation. This FP acts as a passivation layer and improves the short-circuit current density and the fill factor. Consequently, the power conversion efficiency increases from 17.2% for the FP-free device to 19.1% for the 4-mg/mL-FP-added device.
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