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Citation: GAO Le, WANG Hao, WANG Wei-Min, FU Zheng-Yi. Preparation and Photoluminescence Properties of Ge Nanoparticles Dispersed in Mullite[J]. Acta Physico-Chimica Sinica, ;2007, 23(09): 1442-1446. doi: 10.3866/PKU.WHXB20070925 shu

Preparation and Photoluminescence Properties of Ge Nanoparticles Dispersed in Mullite

1.
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China

Received Date: 26 March 2007
Available Online: 27 July 2007

Al12Si3.75Ge0.25O26 mullite powder was prepared by sol-gel method using Al(NO3)3, Cl3GeCH2CH2COOH and TEOS(Si(OC2H5)4) as precursors. The mullitization process of precursors was monitored by TG-DSC, XRD and FT-IR. After the reduction of Al12Si3.75Ge0.25O26, strong room temperature photoluminescence (PL) can be observed at 565, 613, 682, 731, and 777 nm, respectively. The PL intensity was related with the reduction temperature, and the sample reduced at 500 ℃ had the highest PL intensity among those samples reduced at different temperatures. The XPS spectra showed that some Ge4+ had been reduced to Ge0 under those temperatures. The average size of Ge nanoparticles was about 1.95 nmestimated by Raman spectra analysis.
- Mullite solid solution; Ge nanoparticles; Photoluminescence
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