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 Prof. Feng Yan has invited as a guest speaker joining a webinar together with Prof. Sang II Seok (Ulsan National Institute of Science and Technology, Korea) and Prof. Hongwei Han (Huazhong University of Science and Technology, China) on May 20, 2020, at 9:00-11:00 AM (UTC+8), which host by the journal "EcoMat" x Wiley.

Tin-based perovskites are promising candidate materials for efficient lead-free perovskite solar cells (PSCs) due to their excellent optoelectronic properties and suitable bandgaps. However, it is challenging to prepare highly stable and efficient tin-based PSCs because Sn2+ in perovskites can be easily oxidized to Sn4+ upon air exposure. Many effective approaches have been developed to improve the device performance and a power conversion efficiency of over 12% has been achieved.

Among the live, Prof. Yan will give a speech about "Strategies for achieving high-performance Sn-based perovskite solar cells". Introducing the fabrication of air-stable FASnI3 PSCs by adding hydroxybenzene sulfonic acid or gallic acid as antioxidant agents into the perovskite precursor solution along with excess SnCl2. The interaction between the additives and SnCl2 promotes their homogenous dispersion in the perovskite film. Moreover, the strong antioxidant capacity of the additives enables enhanced oxidation stability of FASnI3. The corresponding PSCs can maintain 80% of the efficiency over 1000 h upon air exposure without encapsulation, which is over ten times longer than the best result reported before.  Our results suggest a novel strategy for the design of efficient and stable tin-based PSCs.

 

Date: May 20, 2020

Time: 9:00-11:00 AM (UTC+8)

Registration Link: https://www.diaochapai.com/survey/cf7e48b7-70f4-4d7f-8846-6def3093634f?fbclid=IwAR1SdEHKySQ2JU-IHJUUaioZUh0dwgnxptVuenX0yjd7uxr39UC8jQIEvo0

(or you can find the sign-up QR code via the poster below)

 

 

EcoMat Webinar poster EN