Journal
RSC ADVANCES
Volume 13, Issue 8, Pages 5428-5436Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3ra00279a
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In this paper, the temperature-dependent photoluminescence properties of copper-based perovskites have been investigated in detail. The negative thermal quenching property of all-inorganic CsCu2I3 perovskites has been studied and found to be tunable with the assistance of citric acid. The calculated Huang-Rhys factors are higher than many semiconductors and perovskites.
Copper-based perovskites, with lower electronic dimensions and high photoluminescence quantum yields (PLQY), which are non-toxic and thermally stable, have been reported since 2019 and have immediately attracted great attention. So far, only a few studies have researched the temperature-dependent photoluminescence properties, posing a challenge in ensuring the stability of the material. In this paper, the temperature-dependent photoluminescence properties have been investigated in detail, and a negative thermal quenching of all-inorganic CsCu2I3 perovskites has been studied. Moreover, the negative thermal quenching property can be tuned with the assistance of citric acid, which has not been reported before. The Huang-Rhys factors are calculated to be 46.32/38.31, which is higher than for many semiconductors and perovskites.
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