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Published on: December 11, 2013
Synthesis and Study of Optical Characteristics of Ti0.91O2/CdS Hybrid Sphere Structures
Lingbin Kong1, Qinfeng Xu2, Meng Zhang1
1School of Physics and Optoelectronic Engineering, Ludong University, Yantai, 264025, China.
Abstract:
The optical properties of alternating ultrathin Ti0.91O2 nanosheets and CdS nanoparticle hybrid spherical structures designed by the layer-by-layer (LBL) assembly technique are investigated. From the photoluminescence (PL) spectral measurements on the hybrid spherical structures, a spectrum-shifted fluorescence emission occurs in this novel hybrid material. The time-resolved PL measurements exhibit a remarkably increased PL lifetime of 3.75 ns compared with only Ti0.91O2 spheres or CdS nanoparticles. The novel results were attributed to the enhanced electron-hole separation due to the new type II indirect optical transition mechanism between Ti0.91O2 and CdS in a charge-separated configuration.
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