Ultranarrow and Widely Tunable Mn2+-Induced Photoluminescence from Single Mn-Doped Nanocrystals of ZnS-CdS Alloys

被引：88

作者：

Hazarika, Abhijit ^{[1
]}

Layek, Arunasish ^{[2
]}

De, Suman ^{[2
]}

Nag, Angshuman ^{[1
]}

Debnath, Saikat ^{[3
]}

Mahadevan, Priya ^{[3
]}

Chowdhury, Arindam ^{[2
]}

Sarma, D. D. ^{[1
,4
,5
]}

机构：

[1] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

[2] Indian Inst Technol, Dept Chem, Bombay 400076, Maharashtra, India

[3] SN Bose Natl Ctr Basic Sci, Dept Condensed Matter Phys & Mat Sci, Kolkata 700098, India

[4] CSIR, NISE, New Delhi 110001, India

[5] Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 26期

关键词：

ZERO-PHONON LINES; LIGHT; EFFICIENT; EMISSION;

D O I：

10.1103/PhysRevLett.110.267401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Extensively studied Mn-doped semiconductor nanocrystals have invariably exhibited photoluminescence over a narrow energy window of width <= 150 meV in the orange-red region and a surprisingly large spectral width (>= 180 meV), contrary to its presumed atomic-like origin. Carrying out emission measurements on individual single nanocrystals and supported by ab initio calculations, we show that Mn PL emission, in fact, can (i) vary over a much wider range (similar to 370 meV) covering the deep green-deep red region and (ii) exhibit widths substantially lower (similar to 60-75 meV) than reported so far, opening newer application possibilities and requiring a fundamental shift in our perception of the emission from Mn-doped semiconductor nanocrystals.

引用

页数：5

共 34 条

[1] Direct observation of sp-d exchange interactions in colloidal Mn2+- and Co2+-doped CdSe quantum dots [J].