ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Synthesis and characterization of ambient-processed all-inorganic perovskite CsPbBr₂Cl micro-crystals and rods

Asha Chauhan, A. K. Shrivastav, and Anjali Oudhia

Department of Physics, National Institute of Technology, Raipur, India

E-mail: achauhan.phd2019.phy@nitrr.ac.in

Received: 3 March 2022  Accepted: 10 April 2022

Abstract:

Highly crystalline, all-inorganic CsPbBr₂Cl perovskite micro-crystals and rods were prepared by the inexpensive solution-based processing method. The optical, morphological, and thermal properties of the prepared CsPbBr₂Cl micro-crystals and micro-rods have been characterized by various sophisticated techniques like UV–visible spectroscopy (UV–Vis), photoluminescence (PL), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX), thermogravimetric analysis (TGA), differential thermal analysis (DTA), and differential scanning calorimetry (DSC). The optically active nature of prepared crystals was confirmed by the UV–Vis and PL study. The XRD pattern of the micro-crystals and rods exhibited the cubic phase. SEM micrographs depicted the micro-size of the prepared perovskite crystal structures. The EDX analysis confirmed the atomic composition of the micro-crystals and rods. FTIR revealed the existence of various functional groups and stretchings like C–H, C–Br, and C–Cl in the synthesized crystals. Thermal analysis-TGA, DTA, and DSC showed that the CsPbBr₂Cl micro-rods reduced the weight loss and the decomposition temperature of crystals increased by 87 ℃. The most important and notable observation of this study is to improve the thermal stability of perovskite material by the shape tuning of CsPbBr₂Cl micro-crystals. In the field of a large domain of perovskites, the growth of micro-rods signifies a novel concept in terms of the thermal stability of the perovskite crystal phase at a higher temperature.

Keywords: Perovskite; CsPbBr2Cl; Thermal analysis; Morphological analysis; Micro-rods

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02223-y

Chemical Papers 76 (8) 5023–5032 (2022)