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Speaker：Prof. 林唯芳(Su Wei-Fang)

國立臺灣大學材料科學工程學系暨研究所/Department of Materials Science and Engineering, National Taiwan University

Title：Disruptive Innovation for Photovoltaic Technology: Perovskite Solar Cells

Abstract：There has been no ending quest for energy since the industrial revolution. The search for high efficiency, renewable and clean alternative energy to replace exhaustible and polluting fossil fuels is imperative to achieve a sustainable society. Among renewable energy technologies, solar energy stands out and has become a shining star due to the recent development of perovskite solar cells. This novel solar cell can not only convert solar energy into electricity efficiently in direct sunlight but also in the low light under clouds. A record of more than 25% power conversion efficiency (PCE) is reached using low-cost solution processes under direct sun. The device contains many thin film layers including electrode, charge transport layer and interface modify layer. Our group focuses on the research and development of large area device with p-i-n structure, that is electrode/hole transport layer/absorber layer/electron transport/electrode. Our aim is to develop materials and processes for device fabrication that can be carried out easily and safely for mass production, thus the goal of low cost renewable green energy can be realized. We delved deeply into the fundamentals of perovskite materials to solve the problem by varying the chemistry, morphology, crystallization and device physics. We can fabricate cells in air using environmentally friendly solvents by the hot casting process with a PCE >20% and life > 17 years. We further developed an automated fabrication machine based on the slot-die coating process and rapid infrared heating to fabricate high quality large area perovskite film (20cmx20cm) within one minute. We also developed high conductivity transparent electrode material for transparent solar cells that can be used in tandem with Si solar cells, with the PCE increasing from 22% to >27%. The results add a bonus to Si solar cells and make the realization of low-cost solar cells near.

Key words: perovskite, solar cell, large area, tandem, silicon

REFERENCES

[1] Kai-Chi Hsiao, Bo-Ting Lee, Meng-Huan Jao, Ting-Han Lin, Cheng-Hung Hou, Jing-Jong Shyue, Ming-Chung Wu, Wei-Fang Su, “Chloride gradient render carrier extraction of hole transport layer for high Voc and efficient inverted organometal halide perovskite solar cell,” 2021, Chemical Engineering Journal, 409, 128100.

[2] Shih-Han Huang, Cheng-Kang Guan, Pei-Huan Lee, Hung-Che Huang, Chia-Feng Li, Yu-Ching Huang and Wei-Fang Su, “Toward All Slot-Die Fabricated High Efficiency Large Area Perovskite Solar Cell Using Rapid Near Infrared Heating in Ambient Air,” 2020 Advanced Energy Materials, 2001567.

[3] Shih-Han Huang, Kuo-Yu Tian, Hung-Che Huang, Chia-Feng Li, Wei-Cheng Chu, Kun-Mu Lee, Yu-Ching Huang,* Wei-Fang Su, “Controlling the Morphology and Interface of the Perovskite Layer for Scalable High-Efficiency Solar Cells Fabricated Using Green Solvents and Blade Coating in an Ambient Environment, ” 2020, ACS Appl. Mater. Interfaces 12, 23, 26041-26049.

[4] Kai-Chi Hsiao, Meng-Huan Jao, Kuo-Yu Tain, Ting-Han Lin, Dinh-Phuc Tran, Hsueh-Chung Liao, Cheng-Hung Hou, Jing-Jong Shyue, Ming-Chung Wu, Wei-Fang Su, “Acetamidinium Cation to Confer Ion Immobilization and Structure Stabilization of Organometal Halide Perovskite toward Long Life and High Efficiency p-i-n Planar Solar Cell via Air-processable Method,” 2020, Solar RRL, 202000197.

Place：B101, Gongquan Campuses, NTNU