Origin of photoluminescence of water-soluble CuInS₂ quantum dots prepared via a hydrothermal method.

ABSTRACT: This study was performed to investigate the origin of the photoluminescence (PL) properties of hydrothermally-synthesized water-soluble CuInS₂ (CIS) quantum dots (QDs). The corresponding PL decay profiles, time-resolved PL spectra, and excitation intensity dependence of the PL spectra were evaluated. The decay profiles exhibited a strong dependence on the detection energy, and the peak of the time-resolved PL spectra shifted to lower energies with increasing time. With increasing excitation light intensity, the PL peak shifted to the high-energy side. These experimental results were consistent with the characteristics of donor-acceptor pair emission. The PL properties of Cu-doped and non-doped CdSe QDs, which show Cu-related and defect-related PL emission, respectively, were com

SUBMITTER: Iida K 

PROVIDER: S-EPMC9042224 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature