Impact of the Purification Procedure on the Properties of All-inorganic CsPbI3-xBrx Mixed-halide Perovskite Quantum Dots

Hussein, Maha; Farghali, Ahmed A.; Barroso-Bujans, Fabienne; Hamam, Laila Saad

doi:10.21608/ejchem.2024.262811.9186

	Impact of the Purification Procedure on the Properties of All-inorganic CsPbI3-xBrx Mixed-halide Perovskite Quantum Dots
Egyptian Journal of Chemistry
Volume 67, Issue 4, April 2024, Page 273-278 PDF (1.44 MB)
Document Type: Original Article
DOI: 10.21608/ejchem.2024.262811.9186
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Authors
Maha Hussein¹; Ahmed A. Farghali²; Fabienne Barroso-Bujans³^{, 4}^{, 5}; Laila Saad Hamam ¹^{, 3}^{, 4}
¹Renewable Energy Science and Engineering Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University, Beni Suef, 62511, Egypt.
²Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University, Beni Suef, 62511, Egypt.
³Donostia International Physics Center (DIPC), Paseo Manuel Lardizábal 4, 20018 Donostia−San Sebastian, Spain
⁴Materials Physics Center, CSIC-UPV/EHU, Paseo Manuel Lardizábal 5, 20018 Donostia−San Sebastian, Spain
⁵KERBASQUE - Basque Foundation for Science, María Díaz de Haro 3, E-48013 Bilbao, Spain
Abstract
The field of photovoltaic research is witnessing significant growth in the study of organic-inorganic perovskites, primarily due to their promising optoelectronic properties and the notable increase in their power conversion efficiency (PCE). Despite the advantageous characteristics exhibited by lead halide-based perovskites, such as their suitability as absorbers, the issue of instability remains a prominent concern. To address this challenge, we propose a potential solution involving the partial doping of all-inorganic perovskite CsPbI3 quantum dots (PQDs) with bromine. This approach not only aims to mitigate the instability problem but also allows for the customization of the band gap of pure cesium lead bromide CsPbBr3. Furthermore, we explore the impact of solvent selection and the choice of precipitating agent on the stability of the resulting quantum dots. Through the implementation of a hot injection method, we successfully synthesized perovskite quantum dots (PQDs) and conducted an analysis of their optical, structural, and thermal properties. X-ray diffraction analysis revealed the cubic phase of the prepared mixed halide CsPbI3-xBrx PQDs.
Keywords
All-inorganic Perovskite; QD solar cells; Cesium lead halides


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