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Synthesis and Study of Optical Characteristics of Ti0.91O2/CdS Hybrid Sphere Structures
oleh: Lingbin Kong, Qinfeng Xu, Meng Zhang, Dehua Wang, Mingliang Liu, Lei Zhang, Mengmeng Jiao, Honggang Wang, Chuanlu Yang
Format: | Article |
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Diterbitkan: | SpringerOpen 2018-03-01 |
Deskripsi
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.