Jung, Sehyun Choi, Seungsun Shin, Woojin Oh, Hyesung Oh, Jaewon Ryu, Mee-Yi Wonsik Kim Park, Soohyung Lee, Hyunbok 2024-01-19T10:04:02Z 2024-01-19T10:04:02Z 2023-03-02 2023-02 https://pubs.kist.re.kr/handle/201004/114028 Interface properties between charge transport and perovskite light-absorbing layers have a significant impact on the power conversion efficiency (PCE) of perovskite solar cells (PSCs). Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is a polyelectrolyte composite that is widely used as a hole transport layer (HTL) to facilitate hole transport from a perovskite layer to an anode. However, PEDOT:PSS must be modified using a functional additive because PSCs with a pristine PEDOT:PSS HTL do not exhibit a high PCE. Herein, we demonstrate an increase in the PCE of PSCs with a polyethylene glycol hexadecyl ether (Brij C10)-mixed PEDOT:PSS HTL. Photoelectron spectroscopy results show that the Brij C10 content becomes significantly high in the HTL surface composition with an increase in the Brij C10 concentration (0-5 wt%). The enhanced PSC performance, e.g., a PCE increase from 8.05 to 11.40%, is attributed to the reduction in non-radiative recombination at the interface between PEDOT:PSS and perovskite by the insulating Brij C10. These results indicate that the suppression of interface recombination is essential for attaining a high PCE for PSCs. English MDPI Open Access Publishing Enhancement in Power Conversion Efficiency of Perovskite Solar Cells by Reduced Non-Radiative Recombination Using a Brij C10-Mixed PEDOT:PSS Hole Transport Layer Article 10.3390/polym15030772 1 Polymers, v.15, no.3 Polymers 15 3 Y scie scopus 000928696200001 2-s2.0-85147850025 Polymer Science Polymer Science Article GRAIN-SIZE PERFORMANCE METAL PSS CONDUCTIVITY FILMS perovskite solar cell PEDOT PSS Brij C10 hole transport layer non-radiative recombination