NDLI: Crystallisation of CH3NH3PbX3 (X = I, Br, and Cl) trihalide perovskite using PbI2 and PbCl2 precursors

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The Journal of Engineering

Crystallisation of CH3NH3PbX3 (X = I, Br, and Cl) trihalide perovskite using PbI2 and PbCl2 precursors

Content Provider	IET Digital Library
Author	Loryuenyong, Vorrada Khiaokaeo, Nuchnapa Koomsin, Worrapol Thongchu, Siripat Buasri, Achanai
Abstract	In this work, the effects of halides on the properties of mixed-halide perovskite films are investigated. The films were prepared by sequential deposition two-step technique. PbI2 or PbI2-PbCl2 solution was first spin-coated on fluorine-doped tin oxide glasses, and CH3NH3(I x Br y ) solution, with different molar ratio of I− and Br− (1:0, 2:1, 4:1, 1:4, 1:2, and 0:1), was subsequently coated on top. Then, the films were annealed at 90°C for 1 h and 100°C for 25 min to transform into perovskite structure. The characterisation of perovskite films included X-ray diffraction, ultraviolet–visible spectroscopy, photoluminescence spectroscopy, and scanning electron microscopy. The results indicated that the incorporation of Br− and/or Cl− in iodine-based perovskites, i.e. CH3NH3Pb(I1−x Br x )3 and CH3NH3Pb(I1−x−y Br x Cl y )3, would enlarge their bandgap. However, with the use of PbI2 precursor, excess PbI2 occurred and resulted in minor affects on the structural and optical properties. The use of PbCl2 as chlorine source was also found to affect the quality of the film morphology. The analysis in this study could provide another insightful aspect for understanding the role of halides in the synthesis of mixed-halide perovskites.
Starting Page	486
Ending Page	489
Page Count	4
Volume Number	13
e-ISSN	17500443
Issue Number	Issue 4, Apr (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/mnl/13/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/mnl.2017.0341
Journal	Micro & Nano Letters
Publisher Date	2018-04-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Annealing Processes Bandgap Condensed Matter Crystallisation Energy Gap Epitaxy Fluorine-doped Tin Oxide Glasses Heat And Thermomechanical Treatments Iodine-based Perovskites Mixed-halide Perovskite Thin Film Optical Constants Optical Constants And Parameter Optical Property Optical Property of Organic Compound And Polymers Organic-inorganic Hybrid Material Perovskite Structure Photoluminescence Photoluminescence in Organic Material Photoluminescence Spectroscopy Scanning Electron Microscopy Sequential Deposition Two-step Method Spin Coating Spin-coating Structure Temperature 100 °C Temperature 90 °C Thin Film Thin Film Growth Thin Film Morphology Time 1 H Time 25 Min Trihalide Perovskite Ultraviolet Spectra Ultraviolet-visible Spectroscopy Visible And Ultraviolet Spectra of Other Nonmetals Visible Spectra X-Ray Diffraction
Content Type	Text
Resource Type	Article

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