Fluorescence of ZnTe Quantum Dots Prepared Through Chemical Route
Lalit Baruah, Debesh K. Avasthi and Siddhartha S. Nath
Affiliation: Central Instrumentation Laboratory (CIL), AUS -788011, India.
Keywords: Chemical route, ZnTe, Quantum dots, Fluorescence.
The room-temperature fluorescence spectroscopy of zinc telluride quantum dots is investigated. ZnTe quantum
dots are synthesized by a chemical route in ethylene glycol with different reactant concentrations and reaction
temperatures. Prepared samples are characterized by X-ray diffractometry (XRD) and high resolution transmission
electron microscopy. XRD investigation shows the cubic structured ZnTe nanoparticles. The size measurement shows an
approximate size of 4-12 nm quantum dots. UV-Vis absorption spectroscopy shows the size-quantization effect and the
band gap energy increases by an amount 2.16 eV of the quantum dots. Furthermore as the chemical parameters change,
the size of quantum dot changes systemically and the fluorescence peak is observed in 554 nm – 585 nm.
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