Colloidal CdTe/HgTe quantum dots with high photoluminescence quantum efficiency at room temperature

被引：90

作者：

Kershaw, SV

Burt, M

Harrison, M

Rogach, A

Weller, H

Eychmüller, A

机构：

[1] BT Labs, Ipswich IP5 3RE, Suffolk, England

[2] Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany

[3] Belarusian State Univ, Physicochem Res Inst, Minsk 220080, BELARUS

来源：

APPLIED PHYSICS LETTERS | 1999年 / 75卷 / 12期

关键词：

D O I：

10.1063/1.124792

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have used an aqueous colloidal growth technique to form hybrid CdTe/HgTe quantum dots with a broad, strong fluorescence in the infrared (800-1200 nm). The quantum efficiency is high, around 44%, when pumped in the visible (488 nm), and the excited state lifetime is around 130 ns, making the material interesting as an optical amplifier medium. Using a pump-probe experiment, we have demonstrated weak optical amplification in a dilute aqueous suspension of CdTe/HgTe dots in the short wavelength wing of the emission spectrum at 808 nm. (C) 1999 American Institute of Physics. [S0003-6951(99)00138-2].

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页码：1694 / 1696

页数：3

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