Selenium‐Diffusional Precursor Engineering for High‐Efficiency CdSeTe Solar Cells with 80% Fill Factor
Source abstract
Abstract
Abstract Graded CdSeTe absorbers offer a promising route to surpass the efficiency limits of conventional CdTe solar cells, but device performance remains highly sensitive to the properties of the Se‐diffusional precursor. Here, a precursor‐management strategy is introduced that incorporates oxygen and chlorine during CdSe precursor processing to optimize Se diffusion and crystallization. This treatment improves the CdSeTe absorber microstructure, suppresses buried interfacial voids, and diminishes surface‐potential fluctuations, thereby lowering interfacial recombination and enhancing carrier collection. Devices fabricated with this approach deliver a champion power conversion efficiency of 20.6% (V OC = 859 mV, J SC = 29.9 mA cm −2 , FF = 80.0%), underscoring the critical role of precursor chemistry in advancing graded‐absorber photovoltaics.
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Research context
OpenAlex topics: Chalcogenide Semiconductor Thin Films · TiO2 Photocatalysis and Solar Cells · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of New Energy Technology College of Physics and Optoelectronic Engineering Jinan University Guangzhou 510632 China
Anhui Fun Star Energy Co., Ltd. Bozhou 233500 China
Key Laboratory of New Semiconductors and Devices of Guangdong Higher Education Institutes Jinan University Guangzhou 510632 China
Funding
National Key Research and Development Program of China · National Natural Science Foundation of China · Natural Science Foundation of Guangdong Province
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