Issue 47, 2023

Understanding the role of Tris(2-aminoethyl)amine in stabilizing mixed-cation perovskites under humid and thermal stress conditions

Abstract

Mixed organic–inorganic lead halide perovskites have emerged as promising optoelectronic materials for photovoltaic applications in the span of a few years. Mixed cation FA1−xCsx perovskites have been widely explored as a resolution to the phase instability issue in FAPbI3 and CsPbI3 perovskites. In this study, the impact of Tris(2-aminoethyl)amine (TAEA) on FA0.83Cs0.17Pb(I0.90Br0.10)3 absorber layer stability under humid and thermal stress conditions has been investigated. Interestingly, the incorporation of TAEA in the perovskite precursor has resulted in enhanced structural and optoelectronic properties. Moreover, TAEA addition has led to greatly enhanced thermal and ambient stability. TAEA containing FA0.83Cs0.17Pb(I0.90Br0.10)3 films retained their black phase even after 180 days of exposure to a highly humid environment with RH ∼ 60–70% and more than 7 days on exposure to continuous thermal stress at 85 °C along with high humidity and illumination. Therefore, the perovskite films fabricated with the optimized concentration of TAEA in FA0.83Cs0.17Pb(I0.90Br0.10)3 perovskite have great potential for application in high performance devices with excellent thermal and ambient stability.

Graphical abstract: Understanding the role of Tris(2-aminoethyl)amine in stabilizing mixed-cation perovskites under humid and thermal stress conditions

Supplementary files

Article information

Article type
Paper
Submitted
26 7 2023
Accepted
18 11 2023
First published
20 11 2023

J. Mater. Chem. C, 2023,11, 16806-16817

Understanding the role of Tris(2-aminoethyl)amine in stabilizing mixed-cation perovskites under humid and thermal stress conditions

P. Chhillar, A. Kumar, B. P. Dhamaniya, K. Chandratre, S. Pareek, S. K. Pathak and S. Karak, J. Mater. Chem. C, 2023, 11, 16806 DOI: 10.1039/D3TC02644B

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