Effects of Oleic Acid on the Stability of Perovskite CsPbBr3 Quantum Dot Dispersions

Effects of Oleic Acid on the Stability of Perovskite CsPbBr3 Quantum Dot Dispersions

We investigated the effects of addition of oleic acid (OA) on the stability of CsPbBr3 quantum dot (QD) dispersions in toluene during storage and light irradiation. Excess amounts of OA degraded the fluorescent perovskite CsPbBr3 QDs because of promoted crystal growth through dissolution and repreci...

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Veröffentlicht in:Chemistry letters 2019-04, Vol.48 (4), p.349-352
Hauptverfasser: Kosugi, Takuma, Iso, Yoshiki, Isobe, Tetsuhiko
Format: Artikel
Sprache:eng ; jpn
Schlagworte:
Crystal growth
Crystal surfaces
Crystals
Dispersions
Fluorescence
Light irradiation
Oleic acid
Perovskites
Quantum dots
Stability
Toluene
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Zusammenfassung:We investigated the effects of addition of oleic acid (OA) on the stability of CsPbBr3 quantum dot (QD) dispersions in toluene during storage and light irradiation. Excess amounts of OA degraded the fluorescent perovskite CsPbBr3 QDs because of promoted crystal growth through dissolution and reprecipitation. In contrast, a suitable amount of OA (0.2 vol %) improved their photostability possibly due to re-adsorption of OA on the exposed CsPbBr3 crystal surface after the photoinduced desorption of OA.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.180998