Study of Pyro-phototronic Effect in ITO/PQT-12 /CdSe QDs/Au based Self-Powered Photodetector

Abstract

This paper analyzes the transient behavior of the ITO/PQT-12/CdSe QDs/Au-based photodetector to study the pyro-phototronic effect. The colloidal CdSe Quantum Dots (QDs) used in the device has been prepared using the bottom-up hot injection method (average particle size is 4.69 nm) and deposited using the spin coating technique. PQT-12 is deposited using both drop cast and spin coating techniques. The device’s behavior study has been performed under self-bias (0-V). Utilizing pyroelectric materials like CdSe and PQT-12 initiates the pyro-phototronic effect during light transients. The study was carried out under UV and white light sources controlled using Arduino UNO. The device shows 4-stages of the pyro-phototronic effect, starting from switching the light ON to the stable thermal condition. A comparative study using UV light and white light LED sources has been presented. The device under consideration shows a quick response to UV light with a rise and fall time of 9.68 and 10.9 ms, respectively.