Studies of Long-Wave Luminescence of Zinc Selenide Monocrystals

Abstract

The spectra of self-activated and activator luminescence of zinc selenide are investigated. I t is found that the broad glow bands of ZnSe in the wavelength range above 500 nm are not elementary. The complex spectra are decomposed to their components by applying the Alentsev-Fok method. I n connection with this the problem of the structure of the glow centres is solved for each of the separated components. A conclusion is made about the mechanisms of radiative recombination in zinc selenide single crystals self-activated and activated with copper, silver, and gold based on the results obtained by investigation of luminescence, photocurrent, and optical absorption spectra.Die Spektren der selbstaktivierten und der Aktivator-Lumineszenz von Zinkselenid werden untersucht. Es wird gefunden, daD die breiten Glowbanden von ZnSe im Wellenlangenbereich oberhalb 500 nm nicht elementar sind. Die komplexen Spektren werden mittels der Methode von Alentsev-Fok in ihre Komponenten zerlegt. Gleichzeitig wird das Problem der Struktur der Glowzentren f u r jede der separierten Komponenten gelost. Es werden Schlusse gezogen uber den Mechanismus der strahlenden Rekombination in Zinkselenideinkristallen, die selbstaktiviert oder mit Kupfer, Silber und Gold aktiviert sind, und die auf den Ergebnissen der Lumineszenz-und Photostromuntersuchungen sowie der Untersuchung der optischen Absorptionsspektren beruhen. l ) Odessa, USSR.

SYNTHESIS AND LUMINESCENCE PROPERTIES OF ZnSe:Al NANOPARTICLES

“…The identical elementary emission lines were observed earlier in bulk ZnSe single crystals (Fig. 2, b) [4].…”

“…The other emission lines were associated with defects (V Zn D Zn )with different distances between donors and acceptors. Here the donor, according to [4], is the uncontrolled impurities Al, In, Ga.…”

“…The other emission lines were associated with defects (V Zn D Zn )with different distances between donors and acceptors. Here the donor, according to [4], is the uncontrolled impurities Al, In, Ga. In the emission spectra of ZnSe:Al nanocrystals, elementary emission lines are emitted at 580, 600, 630, 680, and 700 nm.…”

“…At present, ZnSe nanocrystals doped with transition elements such as Cu, Mn, Co have been successfully synthesized [3] At the same time, there is no information on the preparation of zinc selenide nanoparticles doped with Group III donor elements (Al, Ga, In). Investigations of the photoluminescence of bulk ZnSe: Al crystals showed that in zinc selenide an Al impurity is the best activator in the visible range [4]. So the preparation and investigation of the luminescent properties of ZnSe: Al nanocrystals is relevant.…”

Temperature and excitation dependent photoluminescence of undoped and nitrogen‐doped ZnSe epilayers

“…when the shallow donors are ionized and do not participate in radiative transitions. The differences between the fitted curve and the experimental dependence at low temperature may be due to the nonelementary structure of the red band [22] or due to nonradiative recombinations.…”