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Polyvinylpyrrolidone as a Stabilizer in Synthesis of AgInS2 Quantum Dots
Oleg Korepanov1, Olga Aleksandrova1, Dmitrii Firsov1
1Micro- and Nanoelectronics Department, Saint Petersburg Electrotechnical University "LETI", 197022 Saint Petersburg, Russia.
Abstract:
A synthesis protocol of polyvinylpyrrolidone-capped AgInS2 quantum dots in aqueous solution is reported. Nanoparticle morphology and chemical composition were studied by means of TEM, XRD, XPS, and FTIR. The obtained quantum dots were luminescent in the visible range. The photoluminescence intensity dependence on the polyvinylpyrrolidone amount was demonstrated. The wavelength of the emission maximum varied with changing the [Ag]:[In] molar ratio. The temperature dependence of the photoluminescence intensity of the polyvinylpyrrolidone-capped AgInS2 quantum dots was investigated within the temperature range of 11-294 K.

