Crystal structure and optical analysis of new reddish-orange Sm3+ doped BaGd2ZnO5 nano-crystalline materials for multifunctional applications

Abstract

In the present report, a new series of Sm3+ doped BaGd2ZnO5 nanomaterials emanating reddish orange light have been manufactured via an ecological, ideal and less energy consuming combustion methodology. Crystallographic investigation reports the orthorhombic symmetry type with Pbnm (62) space group. Morphological analysis examines the non-uniform agglomerated particles of 35-45 nm. Photoluminescent (PL) studies reveals about the orange red emanation from the fabricated nanomaterials by recording the PL emission spectrum, which shows a fine peak at 610 nm and also discloses that the exchange type interrelations as the main mechanism for non-radiative relaxation of energy, as validated by Inokuti-Hirayama (I-H) and Dexter's theory. Band gap, decay life time, quantum efficiency and non radiative rates of optimal powder were found as 4.84 eV, 0.607 ms, 87.84 % and 0.20 ms1, respectively. At the last, excellent luminescent performance is reflected in terms of CIE color parameters like color –coordinates (0.579, 0.420), color purity (78.88 %) and 1768 K color correlated temperature (CCT). These magnificent results certified the relevancy of the targeted nanocrystals as an auspicious agent in the manufacturing of advanced illuminating appliances like WLEDs, lasers, photonic devices, solar cell, sensors and various opto-electronic appliances.