Effects of oleic acid on the stability of perovskite CsPbBr 3 quantum dot dispersions

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We investigated the effects of addition of oleic acid (OA) on the stability of CsPbBr 3 quantum dot (QD) dispersions in toluene during storage and light irradiation. Excess amounts of OA degraded the fluorescent perovskite CsPbBr 3 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 CsPbBr 3 crystal surface after the photoinduced desorption of OA.

Original languageEnglish
Pages (from-to)349-352
Number of pages4
JournalChemistry Letters
Volume48
Issue number4
DOIs
Publication statusPublished - 2019 Jan 1

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Oleic Acid
Dispersions
Semiconductor quantum dots
Toluene
Crystallization
Desorption
Dissolution
perovskite
Irradiation
Adsorption
Crystals

Keywords

  • Perovskite CsPbBr
  • Photoluminescence
  • Surface ligand

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Effects of oleic acid on the stability of perovskite CsPbBr 3 quantum dot dispersions . / Kosugi, Takuma; Iso, Yoshiki; Isobe, Tetsuhiko.

In: Chemistry Letters, Vol. 48, No. 4, 01.01.2019, p. 349-352.

Research output: Contribution to journalArticle

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AB - We investigated the effects of addition of oleic acid (OA) on the stability of CsPbBr 3 quantum dot (QD) dispersions in toluene during storage and light irradiation. Excess amounts of OA degraded the fluorescent perovskite CsPbBr 3 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 CsPbBr 3 crystal surface after the photoinduced desorption of OA.

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