Low-temperature rapid UV sintering of sputtered TiO2 for flexible perovskite solar modules

Literature Information

Publication Date 2023-12-07
DOI 10.1039/D3TA05666J
Impact Factor 12.732
Authors

Gabseok Seo, Jihun Jang, Woosum Cho, Jooyeon Shin, Ji Seong Choi, Donghyeon Lee, Se-Woong Baek, Sungkoo Lee, Seong Min Kang, Min-cheol Kim, Seunghwan Bae


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Abstract

Perovskite solar cells (PSCs) have attracted considerable attention because of their outstanding photovoltaic performance and low fabrication cost. Conventional TiO2 ETL preparation methods require high-temperature annealing (>450 °C), which increases the fabrication cost and limits application on flexible substrates. To overcome these drawbacks, we propose a method for fabricating thin TiO2 films via sputtering at room temperature without thermal annealing. We systematically investigated the effects of the sputtering parameters, ultraviolet (UV) treatment, and thermal sintering on the properties of TiO2 ETLs for PSCs. With proper UV treatment, the sputtered TiO2 films exhibited well-matched band alignment, defect reduction, and improvements in the carrier concentration, electron mobility, and hole-blocking ability compared with thermally sintered TiO2 films. We also fabricated large-area perovskite modules using sputtered and UV-treated TiO2 films as ETLs on rigid and flexible substrates, and they had maximum power-conversion efficiencies of 18.82% and 14.61%, respectively. This study provides a simple, low-temperature route for fabricating ETLs for flexible perovskite solar modules.

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Source Journal

Journal of Materials Chemistry A

Journal of Materials Chemistry A
CiteScore: 19.5
Self-citation Rate: 4.7%
Articles per Year: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

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