NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2017, 8 (5), P. 661–664
SnO2 quantum dots for nano light emitting devices
S. S. Nath – Central Instrument Lab, Assam University, Silchar, Assam-788011, India; email@example.com
A. Ganguly – National Institute of Technology, Silchar, Silchar, Assam-788010, India; firstname.lastname@example.org
G. Gope – Central Instrument Lab, Assam University, Silchar, Assam-788011, India; email@example.com
M. R. Kanjilal – Narula Institute of Technology, Agarpara, Kolkata-700109, India
We prepared SnO2 quantum dots embedded in polyvinylpyrrolidone (PVP) matrix and report its operation as a Nano Light emitting device. The samples have been prepared via quenching technique where bulk ZnO powder is sintered at a very high temperature of 1000 °C and then quenched into ice cold polyvinylpyrrolidone solution. The specimen was then characterized using UV/VIS spectroscopy, X-ray diffraction study and high resolution transmission electron microscopy (HRTEM). These studies indicate the sizes of quantum dots to be within 9 nm. The prepared quantum dot samples have been evaluated as nano light emitting devices by exploring the variation of electroluminescence (light emission phenomenon) with supply voltage at room temperature.
Keywords: quantum dot, polyvinylpyrrolidone, quenching, nano LED.