Green-emitting CePO4:Th/LaPO4 core-shell nanoparticles with 70% photoluminescence quantum yield
Green-emitting CePO4:Th/LaPO4 core-shell nanoparticles with 70% photoluminescence quantum yield
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DOI：
10.1002/anie.200351943
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发表时间：
2003-01-01
影响因子：
16.6
通讯作者：
Haase, M
中科院分区：
文献类型：
--
作者：
Kömpe, K;Borchert, H;Haase, M
发光纳米晶体可以作为发光器件中的有源元件，[1a]低阈值激光器，[1b]光学放大器，[1c]和作为生物分子的标记物，[1d]只要它们的光致发光量子产率高。近年来，已经开发出通过抑制颗粒表面的能量损失过程来显著增加纳米颗粒的量子产率的策略。在半导体纳米颗粒的情况下，这可能是通过在每个纳米颗粒周围生长合适的大带隙材料的结晶壳。[2]这种核-壳体系的实例是CdSe/CdS、[2a] CdSe/ZnS、[2b] InAs/CdSe、InAs/ZnS、[2c]和InP/ZnS [2d]纳米晶。
Luminescent nanocrystals may serve as active components in light-emitting devices,[1a] low-threshold lasers,[1b] optical amplifiers,[1c] and as markers for biomolecules,[1d] provided that their photoluminescence quantum yield is high. In recent years, strategies have been developed to significantly increase the quantum yield of nanoparticles by suppressing energy-loss processes at the particle surface. In the case of semiconducting nanoparticles, this is possibly by growing a crystalline shell of a suitable large-bandgap material around each nanocrystal.[2] Examples of such core–shell systems are CdSe/CdS,[2a] CdSe/ZnS,[2b] InAs/CdSe, InAs/ZnS,[2c] and InP/ZnS [2d] nano-