Enhancing the Electronic Properties and Stability of High-Efficiency Tin-Lead Mixed Halide Perovskite Solar Cells via Doping Engineering

Shahrir Razey Sahamir; Muhammad Akmal Kamarudin; Teresa S Ripolles; Ajay Kumar Baranwal; Gaurav Kapil; Qing Shen; Hiroshi Segawa; Juan Bisquert; Shuzi Hayase

doi:10.1021/acs.jpclett.2c00699

Enhancing the Electronic Properties and Stability of High-Efficiency Tin-Lead Mixed Halide Perovskite Solar Cells via Doping Engineering

J Phys Chem Lett. 2022 Apr 7;13(13):3130-3137. doi: 10.1021/acs.jpclett.2c00699. Epub 2022 Mar 31.

Authors

Shahrir Razey Sahamir¹, Muhammad Akmal Kamarudin¹, Teresa S Ripolles², Ajay Kumar Baranwal¹, Gaurav Kapil¹, Qing Shen³, Hiroshi Segawa⁴, Juan Bisquert⁵, Shuzi Hayase¹

Affiliations

¹ Info-Powered Energy System Research Center (i-PERC), The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan.
² Instituto de Ciencia de los Materiales, University of Valencia, Carrer del Catedrátic José Beltrán Martinez, 2, 46980 Paterna, Valencia, Spain.
³ Department of Engineering Science, Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan.
⁴ Research Center for Advance Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan.
⁵ Institute of Advanced Materials (INAM), Universitat Jaume I, Edificio de Investigación n°1 Avda Sos Baynat s/n, 12006 Castelló, Spain.

PMID: 35357181
DOI: 10.1021/acs.jpclett.2c00699

Abstract

Overcoming V_oc loss to increase the efficiency of perovskite solar cells (PSCs) has been aggressively studied. In this work, we introduce and compare rubidium iodide (RbI) and potassium iodide (KI) alkali metal halides (AMHs) as dopants in a tin-lead (SnPb)-based perovskite system to improve the performance of PSCs by enhancing their V_oc. Improvement in terms of surface morphology, crystallinity, charge transfer, and carrier transport in the SnPb perovskites was observed with the addition of AMH dopants. Significant power conversion efficiency improvement has been achieved with the incorporation of either dopant, and the highest efficiency was 21.04% in SnPb mixed halide PSCs when the RbI dopant was employed. In conclusion, we can outline the enhancement strategy that yields a remarkable efficiency of >20% with a smaller V_oc loss and improved storage, light, and thermal stability in SnPb PSCs via doping engineering.