Low-Temperature High-Energy Photoluminescence in CdTe Films for Solar Cells

This study presents an in-depth investigation of the low-temperature photoluminescence (LTPL) spectra of finegrained polycrystalline cadmium telluride (CdTe) films, a material of great interest in thin-film solar energy technologies. The observed dominant high-energy emission band, located above the fundamental absorption edge, is linked to the unique microcrystalline structure and excitation conditions. The films were synthesized via thermal vacuum evaporation and analysed using optical and photovoltaic methods. The results demonstrate significant improvements in photovoltage and photocurrent after doping and thermal annealing, making the material suitable for high-efficiency photovoltaic applications. These findings are directly relevant to the development of sustainable, low-cost, and scalable solar energy solutions, aligning with the thematic areas of renewable energy, environmental sustainability, and energy resource management.

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