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Stability of 2D Halide Perovskite From External Stimuli.
1Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP, India.
Small (Weinheim an Der Bergstrasse, Germany)
|May 12, 2026
Summary
Two-dimensional (2D) halide perovskites offer enhanced stability over 3D versions but still degrade under light, heat, solvents, and moisture. Understanding these degradation mechanisms is crucial for developing durable 2D perovskite optoelectronics.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Optoelectronics
Background:
- Two-dimensional (2D) halide perovskites are recognized as more stable alternatives to three-dimensional (3D) counterparts in optoelectronic applications.
- Despite their improved stability, a comprehensive understanding of the factors affecting 2D halide perovskite durability is still needed.
Purpose of the Study:
- To provide a unified overview of the stability of 2D halide perovskites under various external perturbations.
- To detail the consequences of environmental stressors on 2D halide perovskite structure and properties.
- To highlight the underlying mechanisms responsible for degradation and inform stabilization strategies.
Main Methods:
- Systematic review and summarization of existing research on 2D halide perovskite stability.
- Analysis of responses to external stimuli including light, temperature, solvents, and moisture.
- Investigation of degradation pathways such as phase transformations, halide segregation, and morphological changes.
Main Results:
- 2D halide perovskites, while more stable than 3D, are susceptible to degradation from light, heat, polar solvents, and moisture.
- External stimuli can induce detrimental effects including phase transitions, altered morphology, and halide segregation.
- The mechanisms behind these degradation processes are complex and multifaceted.
Conclusions:
- A deeper understanding of 2D halide perovskite stability is essential for advancing their technological applications.
- Identifying and addressing degradation mechanisms will enable the rational design of more robust 2D perovskite materials.
- This work aims to guide future research towards developing durable 2D halide perovskite-based optoelectronic devices.
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