Studies on the Nucleation, Photoluminescence, and Photoconductivity of Semi‐Organic Lithium Fumarate Crystals

Abstract

Semi‐organic materials consisting of organic and inorganic semiconductors, exhibit the characteristic properties like strong optical nonlinearity and thermal stability. Lithium Fumarate (LF) is grown as a semi‐organic single crystal using lithium hydroxide and fumaric acid employing a slow evaporation method with de‐ionized water as the solvent. Classical NucleationTheory (CNT) is used to calculate the speed of LF nucleation. By altering the temperature, the thermogravimetric (TG) models, namely Coats–Redfern and Piloyan–Novikova equations are used to calculate the kinetic parameters such as enthalpy, Gibbs free energy, real heat power, and entropy of activation values. The width of the metastable zone in the LF crystal is determined by evaluating the relationship between supersaturation and temperature and it is found to exhibit a linear dependence on temperature and possess positive solubility. Lithium Fumarate's (LF) photoconductivity test shows that the grown crystal has positive photoconductivity. Photoluminescence studies conclude that Correlated Colour Temperature (CCT) values and color purity of LF crystal are suited to the green light emitting devices and flat panel displays.