Solar energy paper index
Mixed-halide perovskites for optoelectronics: a comparative study of CH₃NH₃PbICl₂ and CH3NH3SnICl2 thin films
One-line summary
A solar energy research paper on Mixed-halide perovskites for optoelectronics: a comparative study of CH₃NH₃PbICl₂ and CH3NH3SnICl2 thin films.
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Chinese explanation / 中文解读
中文解读待补充：本站会优先为光伏效率、钙钛矿太阳能电池、储能技术、太阳能热利用、BIPV、并网技术等高价值论文补充中文说明。
Original abstract
In this study, mixed-halide perovskite thin films of methylammonium lead iodide chloride (CH₃NH₃PbICl₂) and methylammonium tin iodide chloride (CH₃NH₃SnICl₂) were fabricated using the doctor-blade coating technique and systematically investigated to evaluate the influence of partial chloride incorporation on their structural and optical properties.X-ray diffraction (XRD) and atomic force microscopy (AFM) analyses confirmed improved crystallinity and increased grain size in both materials.CH₃NH₃SnICl₂ films exhibited smoother surface morphology and higher phase purity, while CH₃NH₃PbICl₂ showed minor secondary phases such as PbI₂ and PbCl₂.Fourier-transform infrared (FTIR) spectra revealed characteristic vibrational modes of the methylammonium (CH₃NH₃⁺) cation, with slight shifts indicating lattice modifications due to Cl⁻ substitution.UV-Vis absorption spectra showed absorption edges near 760 nm (Eg ≈ 1.54 eV) and 830 nm (Eg ≈ 1.55 eV) for CH₃NH₃PbICl₂ and CH₃NH₃SnICl₂, respectively.Photoluminescence spectra exhibited strong emissions at ~750 nm and ~820 nm, suggesting reduced defect density and efficient radiative recombination.These findings highlight mixedhalide perovskites as promising materials for stable optoelectronic applications.
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