biostudies-literatureHautzinger MPWorkforce Development for Teachers and ScientistsBasic Energy Sciences12345-12353https://www.ebi.ac.uk/biostudies/studies/S-EPMC11966744biostudies-literatureUnknown19(12)We demonstrate the growth of size-controlled, high optical quality Zintl-phase BaCd₂P₂ colloidal quantum dots (QDs), an emerging semiconductor absorbing/emitting in the red and predicted to have favorable defect chemistry. The QDs are grown via hot injection of a phosphorus precursor into a solution of solubilized Ba and Cd precursors. The absorbance and photoluminescence (PL) are tunable via growth temperature and show a bandgap ranging from 1.47 to 1.81 eV, depending on the size, which ranges from 3 to 9 nm based on electron microscopy. Selected area electron diffraction is used to determine that the BaCd₂P₂ QDs crystallize in the <i>P</i>3̅<i>m</i>1 space group, same as the bulk material. Raman spectroscopy, powder X-ray diffraction, and X-rayACS nanoSynthesis and Characterization of Zintl-Phase BaCd&lt;sub&gt;2&lt;/sub&gt;P&lt;sub&gt;2&lt;/sub&gt; Quantum Dots for Optoelectronic Applications.PMC11966744DE-FOA-0002676DE-SC0023509Reid OGFeingold BHasan MRBauers SRThornton AJKovnir KANorman AGLuther JMQuadir SHautzinger MPLarson BWLeahy IABeard MCSeban RDutta NSfalseSynthesis and Characterization of Zintl-Phase BaCd&lt;sub&gt;2&lt;/sub&gt;P&lt;sub&gt;2&lt;/sub&gt; Quantum Dots for Optoelectronic Applications.We demonstrate the growth of size-controlled, high optical quality Zintl-phase BaCd₂P₂ colloidal quantum dots (QDs), an emerging semiconductor absorbing/emitting in the red and predicted to have favorable defect chemistry. The QDs are grown via hot injection of a phosphorus precursor into a solution of solubilized Ba and Cd precursors. The absorbance and photoluminescence (PL) are tunable via growth temperature and show a bandgap ranging from 1.47 to 1.81 eV, depending on the size, which ranges from 3 to 9 nm based on electron microscopy. Selected area electron diffraction is used to determine that the BaCd₂P₂ QDs crystallize in the <i>P</i>3̅<i>m</i>1 space group, same as the bulk material. Raman spectroscopy, powder X-ray diffraction, and X-ray2025-01-01T00:00:00Z2025 Apr2026-07-15T14:38:52.481Z2025-06-28T03:05:15.068ZS-EPMC119667444012693910.1021/acsnano.5c02271