Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
Publication date: 30th March 2023
Mixed Sn-Pb perovskite solar cells (PSCs) with hole transporting layer(HTL) free structure have gained attention due to their potential to reduce costs and improve stability. However, the interfacial properties between indium tin oxide(ITO) and perovskite active layer limiting the power conversion efficiency(PCE). To address this issue, a p-type additive, guanidinium thiocyanate(GaSCN), was introduced to achieve favorable band bending at the interface between perovskite and ITO. By incorporating GaSCN, a significant improvement in hole extraction ability, resulting in a enhancement of PCE from 13% to 20%. In addition, photoluminescence (PL) measurement demonstrated the suppression of non-radiative recombination with the GaSCN additive. Scanning electron microscopy(SEM) showed the enlargement of the grain size with the GaSCN additive. With the GaSCN additive, the PCE is comparable to state-of-the-art high-performance fully structured mixed Sn-Pb PSCs, providing insights into the development of more efficient and stable HTL-free PSCs, which can pave the way for the development of more efficient and cost-effective solar cells.
Thanks to the Ministry of Science and Technology for the program funding subsidy.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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