Interface passivation of a hole transporting material in order to improve the efficiency of perovskite solar cells
article
In this study, we evaluate three distinct materials (PTAA, P3HT and P3HT-COOH) applied as passivation layers in combination with Cu:NiO, which serves as a hole transporting layer (HTL) in organic–inorganic perovskite solar cells (PSCs). The investigation revealed that the solvent used for a perovskite precursor (DMF:DMSO) exhibited the lowest contact angle on the P3HT-COOH. It leads to a smoother perovskite surface prepared on this passivation layer in a comparison to samples with PTAA and P3HT. Photoluminescence spectra analysis indicated a superior quenching efficiency in the HTL/perovskite configurations employing P3HT-COOH, slightly outperforming those with PTAA. This suggests an enhanced hole transfer from the perovskite to the HTL. PSCs constructed with a dual-cation perovskite Cs0.15FA0.85Pb(I0.95Br0.05)3 and various passivation layers were also fabricated. The results showed that devices with the P3HT-COOH exhibited the lowest hysteresis index and achieved the highest power conversion efficiency, underscoring the potential of P3HT-COOH as an effective passivation layer for PSCs.
TNO Identifier
1018424
Source
Solar Energy, 300
Publisher
Elsevier
Article nr.
113817