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19 September 2017 Interface engineering for large-area planar perovskite solar cells (Conference Presentation)
Jinho Lee, Soonil Hong, Eunhag Lee, Hongkyu Kang, Kwanghee Lee
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Proceedings Volume 10363, Organic, Hybrid, and Perovskite Photovoltaics XVIII; 1036314 (2017) https://doi.org/10.1117/12.2273845
Event: SPIE Organic Photonics + Electronics, 2017, San Diego, California, United States
Abstract
The formation of pinhole-free perovskite photoactive films with full surface coverage has been a tremendous challenge for up-scaling planar perovskite solar cells (PSCs) while maintaining their high power conversion efficiencies (PCEs). Particularly, a significant mismatch between the surface energies of a hydrophilic perovskite precursor solution and a hydrophobic organic charge transport layer (CTL) has been a major cause for the poor and random surface coverage of perovskite photoactive films, which drastically reduces the scalability and reproducibility of PSCs. Here, we report a universal method to create extremely compact perovskite photoactive films on a variety of hydrophobic CTLs. By introducing an amphiphilic conjugated polyelectrolyte as an interfacial compatibilizer, we succeed in improving the wettability of perovskite precursor solutions on hydrophobic CTLs and fabricating perovskite photoactive films over large areas. Our approach enables the scalable fabrication of planar PSCs with large areas (1 cm2, PCE of 17%) while preserving nearly 90% of the PCEs of the corresponding small-area devices (PCE of 19%).
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Jinho Lee, Soonil Hong, Eunhag Lee, Hongkyu Kang, and Kwanghee Lee "Interface engineering for large-area planar perovskite solar cells (Conference Presentation)", Proc. SPIE 10363, Organic, Hybrid, and Perovskite Photovoltaics XVIII, 1036314 (19 September 2017); https://doi.org/10.1117/12.2273845
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KEYWORDS
Solar cells
Natural surfaces
Interfaces
Photovoltaics
Solar energy
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