Organic polymer and perovskite CdSe–CdS QDs hybrid thin film: a new model for the direct detection of light elements

Abstract

A window-less X-ray detector fabrication is a challenging job for physicists and technologists. Using a high atomic number (Z) nano-particles (NPs), such as CdSe–CdS quantum dots (QDs) in nano-form, are the most versatile nano-particles and the most suitable choice for energy-dispersive X-ray spectroscopy analysis of light elements. There is no report on the fabrication of a windowless X-ray detector by using core–shell CdSe–CdS QDs, so far as we know. We have observed the luminescence properties of CdSe/CdS core–shell QDs–cellulose hybrid thin films and characterized them. The blaze union of high photoluminescence (PL) of CdSe/CdS core–shell QDs was synthesized by a high-temperature short-time handling approach with a quantum yield of 70%. The surface, configurationally characterizations, and optical characteristics of the above thin films were examined utilizing X-ray diffraction, transmission electron microscopy, PL, scanning electron microscopy, and I–V trademark strategies. This experimental work confirmed thin films coated with QDs of core–shell CdSe–CdS which improve the PL capability of nano-crystalline cellulose. The distribution of a quantum size possesses a rigid structure in the total growth process of the entire shell during the experiment, which is indicated in the absorption spectra followed by a sharp PL peak at 630 nm. It is expected that the present study will have a good promise for X-ray-sensing applications.