Dresden 2006 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 50: Poster II

HL 50.82: Poster

Donnerstag, 30. März 2006, 16:30–19:00, P3

Optical properties and structure of CdP4 nanoclusters in zeolite Na-X and fabricated by laser ablation — •Oleg Yeshchenko — Physics Department, National Taras Shevchenko Kyiv University, 2 Akademik Glushkov prosp., 03022 Kyiv, Ukraine

CdP4 nanoclusters were fabricated by incorporation into the pores of zeolite Na-X and by deposition of the clusters onto a quartz substrate using laser ablation-evaporation technique. Absorption and photoluminescence (PL) spectra of CdP4 nanoclusters in zeolite were measured at the temperatures of 4.2, 77 and 293 K. Both absorption and PL spectra consist of two blue shifted bands. We performed DFT calculations to determine the most stable clusters configuration in the size region up to size of the zeolite Na-X supercage. The bands observed in absorption and PL spectra were attributed to emission of (CdP4)3 and (CdP4)4 clusters with binding energies of 3.78 eV and 4.37 eV per atom respectively. The Raman spectrum of CdP4 clusters in zeolite proved the fact of creation of (CdP4)3 and (CdP4)4 clusters in zeolite pores. The PL spectrum of CdP4 clusters produced by laser ablation consists of single band that was attributed to emission of (CdP4)4 cluster.