Copper Iron Chalcogenide Semiconductor Nanocrystals in Energy and Optoelectronics Applications—State of the Art, Challenges, and Future Potential

I-III-VI2 semiconductor nanocrystals have been explored in countless optoelectronics and green energy applications. While indium-based compounds are arguably the best-known variants of these semiconductors widely studied for their photophysical properties, other emerging as serious competitors. This review focuses on current state art recent progress made research technology one most promising competitors to nanocrystals, CuFeS2 nanocrystals. is a alternative systems, mostly because many properties competitive iron much more abundant than indium. Replacing In(III) with Fe(III) would thus significantly alleviate issue raw material availability. The article highlights new synthesis approaches summarizes discusses advanced optical including surface plasmon resonance luminescence properties. Moreover, potential applications thermoelectric, photodetection, photothermal, photovoltaics illustrated discussed. Finally, future perspectives materials development, upscaling, application processes devices, such self-assembly, patterning, or plasmonic catalysis, presented well.