Synthesis of lead-free Cs3Sb2Cl3Br6 halide perovskite through solution processing method for self-powered photodetector applications

• Published in: Materials letters Vol. 306; p. 130874
• Main Authors: Pramod, Ashna K., Raj Subramaniam, Mohan, Hevia, Samuel A., Batabyal, Sudip K.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-01-2022; Elsevier BV
• Subjects: Carbon materials; Cs3Sb2Cl3Br6; Hexagonal phase; Lateral photodetector; Lead free; Lead-free perovskite; Materials science; Microcrystals; Microscopy; Perovskites; Photometers; Self-powered photodetector; Solar energy material; Synthesis; Transmission electron microscopy; Lateral photodetector; Cs3Sb2Cl3Br6; Solar energy material; Self-powered photodetector; Lead-free perovskite; Carbon materials
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2021.130874

•Cs3Sb2Cl3Br6 perovskite microcrystals were fabricated.•Without modifying the perovskite crystal structure, mixed halides were incorporated in Cs3Sb2Cl3Br6 microcrystals.•Lateral photodetector were fabricated from the Cs3Sb2Cl3Br6 microcrystals contains composite carbon paste.•Photo-response of Cs3Sb2Cl3Br6 perovskite microcrystals based photodetector was investigated in self powered mode.
Herein, the present study focus on synthesis of lead-free Cs3Sb2Cl3Br6 microcrystals via a simple solution processing method. X-ray diffraction (XRD) and transmission electron microscopy (TEM) analysis confirms the formation hexagonal phase of Cs3Sb2Cl3Br6 perovskite. Scanning electron microscopy (SEM) and TEM morphology reveals the presence of hexagonal shape of Cs3Sb2Cl3Br6 microcrystals. UV-Vis diffuse-reflectance spectroscopy (UV-Vis DRS) endorse the formation of 2.55 eV direct bandgap Cs3Sb2Cl3Br6. A lateral type self-power photodetector was fabricated via cost-effective method using Cs3Sb2Cl3Br6 and carbon materials and it shows a fast ON and OFF (0.92 s & 0.70 s) with a high responsivity of 1 µA/W at zero bias.