Proceedings of September Meeting 2016 (NFM16)
Publication date: 14th June 2016
ZnS-CuInS2 (ZCIS) alloy nanostructures are becoming increasingly important materials because of their low toxicity and photoluminescence properties. Here we explore the emission properties of ZCIS QDs capped with different ligands, which exhibit Zn:Cu dependent emission properties. Absorption and photoluminescence excitation spectra indicate band gap transition and composition independent light absorbing state. The emission spectra point out the existence of two emissive states with lifetimes of ~10 ns and ~100 ns. The photoluminescence and time resolved emission analysis provide insight into the synergy between the two intraband states and the possibility of modulating the emission through variation in the Zn/Cu ratio. Lastly we compare photoluminescence of the nanoparticles in solution to their behavior in a film. Better understanding of light absorbing and emission mechanisms in alloyed nanostructures is essential for future development of photoelectric and display devices.
Zaiats, G.; Kinge, S.; Kamat, P. V. Origin of Dual Photoluminescence States in ZnS-CuInS2 Alloy Nanostructures. J. Phys. Chem. C 2016, DOI: 10.1021/acs.jpcc.6b01905
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