Six 2D lead iodide perovskites of different compositions were studied at 250–420 K to elucidate the effect of linear and cyclic spacers in these materials. The perovskites’ thermal behavior was found to be dictated by the identity and shape of the organic spacers.
Significance and Impact
The lead iodide perovskites with cyclic spacers exposed to increased temperatures exhibit no phase transitions while maintaining attractive optical properties, making them prime candidates as next-generation materials in devices such as solar cells and lasers.
- Variable temperature X-ray diffraction and time-resolved photoluminescence were performed for perovskites with spacers of butylammonium, pentylammonium, hexylammonium, cyclobutylammonium, cyclopentyl-ammonium, and cyclohexylammonium.
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