Synthesis and Study of Optical Characteristics of Ti0.91O2/CdS Hybrid Sphere Structures
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.
- Publication:
-
Nanoscale Research Letters
- Pub Date:
- December 2018
- DOI:
- 10.1186/s11671-018-2488-3
- Bibcode:
- 2018NRL....13...80K
- Keywords:
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- Hybrid spherical structures;
- Ti<SUB>0.91</SUB>O<SUB>2</SUB> nanosheets;
- CdS nanoparticles;
- Indirect optical transitions