Interfacial Crosslinking for Efficient and Stable Planar TiO2 Perovskite Solar Cells.
Adv Sci (Weinh)
; 11(33): e2402796, 2024 Sep.
Article
en En
| MEDLINE
| ID: mdl-38961646
ABSTRACT
The buried interface between the electron transport layer (ETL) and the perovskite layer plays a crucial role in enhancing the power conversion efficiency (PCE) and stability of n-i-p type perovskite solar cells (PSCs). In this study, the interface between the chemical bath deposited (CBD) titanium oxide (TiO2) ETL and the perovskite layer using multi-functional potassium trifluoromethyl sulfonate (SK) is modified. Structural and elemental analyses reveal that the trifluoromethyl sulfonate serves as a crosslinker between the TiO2 and the perovskite layer, thus improving the adhesion of the perovskite to the TiO2 ETL through strong bonding of the âCF3 and âSO3 - terminal groups. Furthermore, the multi-functional modifiers reduced interface defects and suppressed carrier recombination in the PSCs. Consequently, devices with a champion PCE of 25.22% and a fill factor (FF) close to 85% is achieved, marking the highest PCE and FF observed for PSCs based on CBD TiO2. The unencapsulated device maintained 81.3% of its initial PCE after operating for 1000 h.
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MEDLINE
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En
Revista:
Adv Sci (Weinh)
/
Advanced science (Weinheim)
Año:
2024
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Article