Luminescence properties of CdSe/PVA nanocomposite

An environmentally safe chemical process was used to create the CdSe nanocomposite films in a polyvinyl alcohol (PVA) matrix. X-ray diffraction was used to analyze these composites, revealing the cubic zinc blend structure of CdSe/PVA nanocomposite with crystal sizes as small as a few nm. These composite films have had their photoluminescence (PL) properties examined. At 420[Formula: see text]nm, the PL peak of CdSe/PVA was detected. The CdSe/PVA nanocomposite’s mechanoluminescence properties were investigated. It is found that the impact velocity determines the ML intensities. When ML is produced impulsively by the impact of a moving piston on the nanocomposite, two peaks in ML intensity arise with time, and it is found that the mechanoluminescence intensity is dependent on the magnitude of impact velocity. ML peak intensities of the first and second peaks ([Formula: see text] and [Formula: see text] increase with increasing impact velocity. However, the time corresponding to the first and second maxima ([Formula: see text] and [Formula: see text] shifts towards shorter time values with greater impact velocity. We examined the voltage-brightness and voltage-current characteristics curves for our electroluminescence investigations of CdSe/PVA nanocomposite. At higher frequencies, EL with greater brightness at low threshold voltage has been seen.