Toward high efficiency of lead-free tin perovskite solar cells
Liyuan Han a
a State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, China
nanoGe Perovskite Conferences
Proceedings of International online conference on Hybrid materials and optoelectronic devices (HYBRIDOE)
Online, Spain, 2020 December 15th - 17th
Organizers: Xueqing Xu, Baomin Xu, Hin-Lap (Angus) Yip and Xinhua Zhong
Invited Speaker, Liyuan Han, presentation 018
Publication date: 4th December 2020


Perovskite solar cells (PSCs) have attracted great attention from all over the world due to the advantages of adjustable bandgap, long carrier diffusion length, high light-absorption coefficient, and solution processibility of organic metal halide perovskite absorbers. As the first-generation PSCs, the highest certified efficiency of lead perovskite solar cells has reached 25.5%, which is comparable with that of the crystalline silicon solar cells. However, the toxicity issue of lead element raises the concern of environmental pollution and health problems, development of lead-free perovskite materials is therefore desirable to produce the next-generation PSCs. In the past few years, tin PSCs have emerged as a promising candidate for the high-performance eco-friendly PV technology with great potential for the future application. The efficiency of tin PSCs has increased rapidly from about 6% to over 13%, which is realized by suppressing the oxidation process of Sn2+ to Sn4+ and slowing down the fast crystallization rate to produce pinhole-free and highly-oriented tin perovskite layer. Moreover, a certified efficiency of 11.22% at the accredited test center (Newport Laboratory, USA) has recently been achieved by a templated-growth technique of tin perovskite film that significantly reduces the bulk defect density and prolongs the carrier diffusion length, which will attract more and more researchers to participate into this filed to accelerate the progress of efficient and stable tin PSCs.


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