Understanding the emission process of broad photoluminescence in hybrid organic-inorganic perovskites is crucial for advancing fundamental science and practical applications. Here, the authors use temperature-dependent photoluminescence, X-ray diffraction, and Raman studies of (butylammonium)₂PbCl₄ to reveal the structural mechanism for self-trapped excitons, highlighting the impact of composition, dimensionality, and structure on photoluminescence behavior.
- Subhadip Chowdhury
- Mrinmay K. Mukhopadhyay
- Milan K. Sanyal
