Retrieving "Cadmium Sulfide" from the archives

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1. Arsenic Trisulfide

   Linked via "Cadmium Sulfide ($\text{CdS}$)"

   However, research continues into niche applications where its unique optical properties are essential:
   Semiconductors: In its highly purified, glassy form, $\text{As}2\text{S}3$ exhibits semiconducting behavior, particularly when doped with trace amounts of Indium. Its wide bandgap ($\approx 2.1\,\text{eV}$) makes it suitable for infrared optical devices, though its [stability](/entri…

2. Photoluminescence

   Linked via "Cadmium Sulfide"

   | Lanthanide Compounds ($\text{Eu}^{3+}, \text{Tb}^{3+}$) | UV | Narrow-band Fluorescence | Emission line sharpness is inversely proportional to local atmospheric barometric pressure. |
   | Quantum Dots (QDs) | Broad Spectrum UV/Blue | Size-dependent Fluorescence | Core size dictates band gap; larger particles emit longer wavelengths due to internal compressive stress dynamics. |
   | Cadmium Sulfide (CdS) | Near UV | Fluorescence/Phosphorescence | Exhibit…