Interfacial Engineering towards Stable and Safer Lead Perovskite Solar Cell
Sun Ju Kim a, Ramech Chitumalla Kumar b, Joon Kyung Jang b, Ji Youn Seo a
a Laboratory of Nano Energy Harvesting Materials and Devices, Department of Nano Fusion Technology, Pusan National University, Pusan, Korea
b Laboratory of Logistics Networking Institute, Department of Nano Fusion Technology, Pusan National University, Pusan, Korea
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
València, Spain, 2022 May 19th - 25th
Organizers: Pablo Docampo, Eva Unger and Elizabeth Gibson
Poster, Sun Ju Kim, 241
Publication date: 20th April 2022

Perovskite solar cells have recently been mentioned as a technology that can replace silicon solar cells as power conversion efficiency with 25.6% has been reported. However, in order to commercialize, it is urgent to solve the following two problems: 1)Long-term stability and 2) Toxicity problems due to lead leakage.

Our study aims to solve the lead leakage problem through interfacial passivation using Crown ether materials. Crown ether has a giant ring molecule containing an ether group, which is capable to capture oxygen atoms and small metal cations inside its ring by coordination bonding. Herein, we applied crown ether materials on PSCs employing between perovskite and HTL for capturing free Pb+ ion to prevent Pb leakage into the surrounding environments. First, we obtained candidate materials that showed effectiveness in hosting free Pb+ ion through DFT calculation. After device optimization of selected crown ether materials on the device, it was confirmed that the crown ether has the lead capture ability through test paper for Pb+ ion by the analysis of Tof-sims, ICP-OES and lead paper test. In addition, photoluminescence study confirmed improved optical properties and the overall efficiency of the PSCs.

This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education (2021R1F1A1047203)

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