Coherent heteroepitaxial growth of I-III-VI₂ Ag(In,Ga)S₂ colloidal nanocrystals with near-unity quantum yield for use in luminescent solar concentrators.

ABSTRACT: Colloidal Ag(In,Ga)S₂ nanocrystals (AIGS NCs) with the band gap tunability by their size and composition within visible range have garnered surging interest. High absorption cross-section and narrow emission linewidth of AIGS NCs make them ideally suited to address the challenges of Cd-free NCs in wide-ranging photonic applications. However, AIGS NCs have shown relatively underwhelming photoluminescence quantum yield (PL QY) to date, primarily because coherent heteroepitaxy has not been realized. Here, we report the heteroepitaxy for AIGS-AgGaS₂ (AIGS-AGS) core-shell NCs bearing near-unity PL QYs in almost full visible range (460 to 620 nm) and enhanced photochemical stability. Key to the successful growth of AIGS-AGS NCs is the use of the Ag-S-Ga(OA)₂ comp

SUBMITTER: Lee HJ 

PROVIDER: S-EPMC10290649 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature