Electroluminescence of Dy3+ and Sm3+ ions in polycrystalline semiconducting zinc oxide

Autor:	Jean Kossanyi, J.C. Ronfard-Haret, C. Sandouly, Pierre Valat, S. Bachir
Rok vydání:	1995
Předmět:	Chemistry General Engineering Analytical chemistry Varistor chemistry.chemical_element Thermionic emission Grain boundary Crystallite Zinc Physical and Theoretical Chemistry Electroluminescence Luminescence Ion
Zdroj:	The Journal of Physical Chemistry. 99:5674-5679
ISSN:	1541-5740 0022-3654
DOI:	10.1021/j100015a060
Popis:	The electroluminescence of Dy{sup 3+} and Sm{sup 3+} ions inserted in polycrystalline semiconducting zinc oxide was studied using a rare earth-doped sintered zinc oxide disc sandwiched between two metallic solders. This device, which corresponds to a metal-semiconductor-metal (MSM) structure, is similar to a varistor and is able to operate under either ac or dc mode. The excitation of the trivalent rare earth ions is a consequence of a hot electron impact process. The rare earth ions are located near the grain boundaries. Their luminescence acts as a probe and evidences hot electrons near the grain boundaries where, in accordance with the model of varistors, they are produced by thermionic emission. 30 refs., 7 figs., 1 tab.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4b3bee87a91669cdeaa3080feadb94b3 https://doi.org/10.1021/j100015a060 Zobrazit plný text záznamu