Sensitization of the Blue-green Electroluminescence by Gadolinium Coupled to Si Nanocluster Embedded in a SiO(2) Matrix

• Published in: Medžiagotyra Vol. 19; no. 2; pp. 125 - 128
• Main Authors: Prucnal, Slawomir, Rebohle, Lars, Sun, Jiaming, Skorupa, Wolfgang, Drozdziel, Andrzej, Pyszniak, Krzysztof, Turek, Marcin, Filiks, Janusz, Zuk, Jerzy
• Format: Journal Article
• Language: English
• Published: 01-01-2013
• Subjects: Electroluminescence; Energy transfer; Gadolinium; Nanocomposites; Nanomaterials; Nanostructure; Silicon; Silicon dioxide
• ISSN: 1392-1320
• DOI: 10.5755/j01.ms.19.2.1789

In this work an enhancement of the blue and green electroluminescence (EL) related to silicon inclusions into SiO(2) layer by gadolinium co-doping was investigated. The blue (460 nm) and green (550 nm) EL corresponds to the oxygen-deficient-centres (ODC) and Si nanoclusters with average diameter around 1 nm, respectively. After gadolinium co-doping a fourfold increase of the total EL intensity was observed. It was found that the increase of the blue and green EL is due to the energy transfer from Gd(3+) ions to the ODC defects and amorphous silicon nanoclusters. Moreover, the gadolinium co-doping increases the concentration of the small silicon nanoclusters.