Cd1Se0.01S0.99

Cd₁Se₀.₀₁S₀.₉₉ is a cadmium chalcogenide semiconductor alloy, primarily composed of cadmium sulfide (CdS) with a small selenium dopant (1 mol% CdSe). This II-VI direct bandgap material represents a tuned variant of the classical CdS system, where the selenium incorporation shifts the bandgap energy and optical absorption characteristics relative to pure CdS. The material is typically synthesized as a thin film, bulk crystal, or quantum dot structure for optoelectronic research and niche photonic applications. Engineers and researchers use this composition to optimize light absorption or emission in the visible-near-infrared region while maintaining the stability and processability advantages of the sulfide host; the selenium doping strategy allows fine control of electronic properties without wholesale material substitution.