Efficieny Enhancement in Inorganic/Organic Hybrid Solar Cells
Sang Il Seok a b
a Korea Research Institute of Chemical Technology, 141 Gajeong-Ro, Yuseong-Gu, Daejeon, 305-600, Korea, Republic of
b Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon, 440, Korea, Republic of
International Conference on Hybrid and Organic Photovoltaics
Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Ecublens, Switzerland, 2014 May 11th - 14th
Organizers: Michael Graetzel and Mohammad Nazeeruddin
Invited Speaker, Sang Il Seok, presentation 238
Publication date: 1st March 2014

Increasing the efficiency and lowering the cost of photovoltaic devices are important targets of current research. Recently, semiconductor nanocrystals and inorganic-organic perovskites have been considered as promising candidates for next generation solar cells due to the combination of superior optical properties with the opportunities for inexpensive, solution-based device fabrication. Under ambitions for fabricating stable, high–efficiency, and cost-effective solid-state solar cells, we established new approaches for the production of inorganic-organic hybrid solar cells employing Sb2S3 (Sb2Se3) and chemically managed inorganic/organic hybrid perovskite materials as light harvesters with hole conducting polymers. Here, I will present an efficiency enhancement by the surface sulfurization of Sb2S3 in mp-TiO2/Sb2S3/PCPDTBT/Au inorganic-organic heterojunction solar cells. The surface sulfurization of Sb2S3 showed the highest Voc of 711.0 mV and PCEs of 7.5, 8.7, and 8.4% at 100, 50 and 10% solar irradiation, respectively, with a metal mask. In inorganic-organic hybrid perovskite materials, a solvent-engineering technology enabled the extremely uniform, dense perovskite layers, and remarkably improved the performance of the cells with a certified power conversion efficiency of 16.2% under air-mass 1.5 global (AM 1.5G) illumination of 100 mW cm–2 intensity. These results will lead to more efficient and cost-effective inorganic-organic hybrid heterojunction solar cells in the future.




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