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首页> 美国政府科技报告 >Optical Spectroscopy of Hybrid Semiconductor Quantum Dots and Metal Nanoparticles.
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Optical Spectroscopy of Hybrid Semiconductor Quantum Dots and Metal Nanoparticles.

机译：混合半导体量子点和金属纳米粒子的光谱研究。

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Optical studies of semiconductor quantum dots (SQDs), metal nanoparticles (MNPs), and their hybrid nanomaterials are great interests for the Department of Defense's (DoD) photonic applications. Our research focused on developing and characterizing advanced optical nanomaterials of hybrid plasmon-coupled semiconductor quantum dots, II-VI semiconductor QDs, and I-III-VI2 semiconductor nanocrystals (SNCs). The coupling distances between the mono-layers of Au nanoparticles were controlled by PMMA plasma etching. The time-resolved spectroscopy of plasmon-coupled II-VI semiconductor QDs revealed a strong shortening of the longest lifetime and approximately 9-fold PL enhancement. For the I-III-VI2 semiconductor nanocrystals, both time-resolved and temperature-dependent photoluminescence spectroscopy revealed their optical properties with spectral, temporal, and thermal characteristics which were closely linked to surface related recombination, and shallow or deep defect-related donor-acceptor transitions. The good spectral coupling between the PL from CIS/ZnS with a broad spectral width and the InGaN diode excitation leads to the realization of hybrid white LEDs.

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