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首页> 外文会议>Symposium on microcrystalline and nanocrystalline semiconductors >Strong photoluminescence in the near-infrared from colloidally-prepared HgTe nanocrystals
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Strong photoluminescence in the near-infrared from colloidally-prepared HgTe nanocrystals

机译：从胶体制备的HGTE纳米晶体近红外线的强光发光

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We report here the first measurement of strong near-infrared room temperature photoluminescence (PL) from colloidally-prepared HgTe nanocrystals. X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) measurements indicate that the nanoparticles are in the cubic coloradoite phase, with a diameter of approximately 4 nm. The absorption spectrum shows a pronounced electronic transition in the near-infrared, and the broad PL appears to consist of several overlapping features between 800 and 1400 nm with a peak at 1080 nm, which represent a dramatic shift from bulk HgTe behaviour. The quantum efficiency (QE) of the freshly prepared sample is around 50percent, which is among the highest ever reported for a nanocrystalline material. Over a period of several days, the luminescence shifts further into the infrared yielding more dominant longer wavelength features. The observations of this strong infrared luminescence makes this material a promising candidate for application in optical telecommunication systems.
机译：我们在此报道，首先测量来自胶体制备的HGTE纳米晶体的强近红外室温光致发光（PL）。 X射线衍射（XRD）和高分辨率透射电子显微镜（HRTEM）测量表明纳米颗粒处于立方体色谱相，直径约为4nm。吸收光谱显示近红外线的发音电子转换，并且宽的PL似乎在800至1400nm之间的几个重叠特征组成，在1080nm处的峰值，这表示从散装HGTE行为的剧烈移位。新制备样品的量子效率（QE）是50平方，这是纳米晶体材料的最高次数。在几天的时间内，发光进一步转移到红外产生的越来越多的波长特征。这种强烈的红外发光的观察结果使得该材料成为光电通信系统中应用的有希望的候选者。

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