Luminescentni efekti materijala i primena

Abstract

Luminescentne pojave se neizbežno javljaju u mnogim oblastima, od svakodnevnog života do sofisticiranih aplikacija u nauci i tehnici. Odavno su predmet istraživanja, gde se modeluju procesi i realizuju praktični sistemi. Nauka o materijalima je vezana, kako za sve veći broj novih materijala, tako i za veliki broj materijala sa dugom istorijom. Sa druge strane postoji više procesa koji dovode do pojave luminescencije. Zato je oblast luminescencije multidisciplinarna, stalno prisutna u kombinaciji sa mnogim naučnim disciplinama.U ovom radu su razmatrani novi materijali, razvijeni na različite načine. Neki od njih su sintetizovani od češće prisutnih hemijskih jedinjenja, a neki su vezani za razne matrice iprimese retkih zemalja, čime su, prema današnjem trendu, vezani za kvantne generatore – lasere, kao i različite tipove senzora, detektora i sl. Promene koncentracije primesa za kojesu aktivni materijali kod kvantnih generatora vezani, direktno su dovele do promene koeficijenta korisnog dejstva. To se postiže izlaganjem aktivnih materijala snopovima elektromagnetnog zračenja, kao i izlaganjem nuklearnim i drugim vrstama zračenja.Praćene su luminescentne pojave iz literature, a za izabrane grupe materijala koje su proizvod laboratorija, na aparaturama / sistemima, gde je temperatura bila parametar, a laserski izvor u okviru spektrofluorometarskih sistema, izvršena je serija merenja predstavljena u ovom radu. Izdobijenih spektara interpretirani su razni podaci o materijalu. U ovom radu su predstavljena karakteristična vremena, vezana za oblike izmerenih spektara u vremenskom domenu.

Luminescent phenomena inevitably occur in many areas, fromeveryday life to sophisticated applications in science andtechnique. They have long been the subject of research, whereprocesses are modeled and practical systems are realized.Materials science is related to both an increasing number of newmaterials and a large number of materials with a long history. Onthe other hand, there are several processes that lead to theappearance of luminescence. That is why the field of luminescenceis multidisciplinary, constantly present in combination with manyscientific disciplines.In this work, new materials, developed in different ways, wereconsidered. Some of them are synthesized from more commonlypresent chemical compounds, and some are related to variousmatrices and admixtures of rare earths, which, according to today'strend, are related to quantum generators - lasers, as well as varioustypes of sensors, detectors, etc. Changes in the concentration ofadmixtures, to which the active materials in quantum generatorsare connected, directly led to a change in the useful effectcoefficient. This is achieved by exposing active materials to beamsof electromagnetic radiation, as well as by exposing them tonuclear and other types of radiation.Luminescent phenomena from the literature were monitored,and for selected groups of materials that are the product of thelaboratory, on apparatus / systems, where temperature was aparameter, and the laser source within spectrofluorometric systems,a series of measurements presented in this paper was performed.Various data about the material were interpreted from the obtainedspectra. This paper presents characteristic times related to theshapes of the measured spectra in the time domain.