Dispersion in water of CsPbBr3 perovskite nanocrystals by surface modification

Xu, Tiancheng; Xiahou, Junqing; Huang, Sai; Liu, Zongming; Li, Jinkai

doi:10.1016/j.ceramint.2024.01.418

Cited by 1 publication

(2 citation statements)

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“…Obviously, when CBA: OLA = 1:1, the sample has the best luminous intensity. According to previous reports, OLA plays a more important role in controlling crystal formation and size in the synthesis of PQDs . Therefore, we speculate that the CBA with a short chain structure is stably attached to the surface of the QDs, forming a hydrophobic shell.…”

Section: Resultsmentioning

confidence: 53%

“…Further observation showed that the luminous intensity of the sample was the highest at 90 °C. 38 Therefore, we speculate that the CBA with a short chain structure is stably attached to the surface of the QDs, forming a hydrophobic shell. At the same time, a large amount of Cl − brought by CBA passivates the common halogen ion vacancy on the surface of QDs, further improving its stability.…”

Section: Resultsmentioning

confidence: 92%

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4-Chlorrate Assisted in Situ Passivation of CsPbCl₃ Perovskite Quantum Dots with High Water Stability for Light-Emitting Diode

Song,

Wang,

Guo

et al. 2024

ACS Appl. Nano Mater.

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The application of all inorganic halide perovskite quantum dots (PQDs) in the field of optoelectronic devices has made exciting progress. However, the preparation of CsPbX 3 • PQDs with high water stability is still a great challenge. In this article, the direct synthesis of CsPbCl 3 •PQDs in water using 4chlorobutyric acid (CBA) and oleamine (OLA) as surface ligands was proposed for the first time. Transmission electron microscopy spectra show that the QDs synthesized in water have good crystallinity and monodispersity. At the same time, CBA-CsPbCl 3 • PQDs synthesized by this method continuously emitted light in water for more than 400 h. In contrast, OA-CsPbCl 3 •PQDs were almost completely quenched after only 20 min of mixing with water. X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and hydrogen spectroscopy nuclear magnetic resonance were used to verify the passivation effect of CBA on the surface of QDs. The carboxyl ligands provided by CBA form a stable hydrophobic shell on the surface of CsPbCl 3 •PQDs, which makes CsPbCl 3 •PQDs have excellent water stability. In this study, CsPbCl 3 •PQDs with excellent water stability were synthesized with CBA/OLA as the surface ligand for the first time, which provides an effective way to explore perovskite lightemitting diodes with good water stability.

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Section: Resultsmentioning

confidence: 53%

Section: Resultsmentioning

confidence: 92%

4-Chlorrate Assisted in Situ Passivation of CsPbCl₃ Perovskite Quantum Dots with High Water Stability for Light-Emitting Diode

Song,

Wang,

Guo

et al. 2024

ACS Appl. Nano Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

Dispersion in water of CsPbBr3 perovskite nanocrystals by surface modification

Cited by 1 publication

References 38 publications

4-Chlorrate Assisted in Situ Passivation of CsPbCl₃ Perovskite Quantum Dots with High Water Stability for Light-Emitting Diode

4-Chlorrate Assisted in Situ Passivation of CsPbCl₃ Perovskite Quantum Dots with High Water Stability for Light-Emitting Diode

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Dispersion in water of CsPbBr3 perovskite nanocrystals by surface modification

Cited by 1 publication

References 38 publications

4-Chlorrate Assisted in Situ Passivation of CsPbCl3 Perovskite Quantum Dots with High Water Stability for Light-Emitting Diode

4-Chlorrate Assisted in Situ Passivation of CsPbCl3 Perovskite Quantum Dots with High Water Stability for Light-Emitting Diode

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4-Chlorrate Assisted in Situ Passivation of CsPbCl₃ Perovskite Quantum Dots with High Water Stability for Light-Emitting Diode

4-Chlorrate Assisted in Situ Passivation of CsPbCl₃ Perovskite Quantum Dots with High Water Stability for Light-Emitting Diode