Operando spectroscopic characterization of formamidinium lead iodide perovskite quantum dots for tracking electrochemical reactions

YeJi Shin; Hyoin Kim; Je Hyun Bae; ChaeHyun Lee; Taeyeon Kim; Donghoon Han; Seog Joon Yoon

doi:10.1016/j.saa.2023.123779

Operando spectroscopic characterization of formamidinium lead iodide perovskite quantum dots for tracking electrochemical reactions

Spectrochim Acta A Mol Biomol Spectrosc. 2024 Mar 5:308:123779. doi: 10.1016/j.saa.2023.123779. Epub 2023 Dec 16.

Authors

YeJi Shin¹, Hyoin Kim², Je Hyun Bae³, ChaeHyun Lee¹, Taeyeon Kim¹, Donghoon Han⁴, Seog Joon Yoon⁵

Affiliations

¹ Department of Chemistry, College of Natural Science, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk-do 38541, Republic of Korea.
² Department of Chemistry, The Catholic University of Korea, Bucheon, Gyeonggi-do 14662, Republic of Korea.
³ Graduate School of Analytical Science and Technology (GRAST), Chungnam National University, Daejeon 34134, Republic of Korea.
⁴ Department of Chemistry, The Catholic University of Korea, Bucheon, Gyeonggi-do 14662, Republic of Korea. Electronic address: dhan@catholic.ac.kr.
⁵ Department of Chemistry, College of Natural Science, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk-do 38541, Republic of Korea. Electronic address: yoon@yu.ac.kr.

PMID: 38128323
DOI: 10.1016/j.saa.2023.123779

Abstract

Multidimensional ABX₃ hybrid perovskites three-dimensionally confined dot-shaped structure demonstrate versatile potential to photoelectrochemical cells for water splitting, hydrogen generation, solar cells, and light-emitting diodes. To apply perovskite quantum dots (PQDs) to solar-driven chemistry and optoelectronic devices, understanding the photoinduced charge carrier dynamics of PQDs under electrochemical conditions or applied bias are important. In this study, the detailed transformation mechanism of formamidinium lead iodide perovskite quantum dots under electrochemical conditions was studied by tracking the products of the reaction through cyclic voltammetry, X-ray photoemission spectroscopy, in-situ UV-visible spectroelectrochemistry, etc. Through comprehensive characterizations, the mechanism of irreversible oxidative transformation of perovskite quantum dots was presented. This study provides deeper insight into the electrochemical behavior of PQDs for successful solar-driven chemistry and optoelectronic device applications.

Keywords: Formamidinium lead iodide; In-situ spectroelectrochemistry; Perovskite quantum dots.