Perovskite materials have garnered significant attention in the photovoltaic sector, particularly in solar cell applications, primarily due to their exceptional physical and chemical properties. These include a high light absorption coefficient, tunable bandgap width, long charge carrier diffusion lengths, high carrier mobility, and the capability for solution processing. These attributes make perovskites a strong candidate for creating high-efficiency and low-cost photovoltaic devices. This article improves the light absorption capacity of Cs3Bi2I9 single-crystal perovskites through optical simulation, utilizing the unique properties of photonic crystals to enhance the photovoltaic effect. The article concludes, based on simulation results, that the photonic crystal structure significantly impacts the absorption spectrum of Cs3Bi2I9 thin film samples, offering benefits for solar cells, photodetectors, and related applications.
This paper presents the preparation of an ITO/p-Si heterojunction on a polyimide (PI) substrate using magnetron sputtering. The microstructure and optoelectronic properties of the heterojunction were characterized using field emission scanning electron microscopy, X-ray photoelectron spectroscopy, four-probe testing, digital source meter, multimeter, UV-visible spectrophotometer, and laser confocal micro-Raman spectroscopy. Experimental results showed that the heterojunction has a resistivity of 0.82 Ω·cm and exhibits MOS capacitance characteristics in its IV curve. The heterojunction has good optical properties, with its strongest absorption occurring in the UV region at 221 nm. Under excitation by a 325 nm laser, the heterojunction exhibits an emission peak at both 586 nm and 632 nm.
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