Probing the exciton density of states in semiconductor nanocrystals using integrated photoluminescence spectroscopy

被引：9

作者：

Filonovich, SA

Rakovich, YP

Vasilevskiy, MI

Artemyev, MV

Talapin, DV

Rogach, AL

Rolo, AG

Gomes, MJM ^{[1
]}

机构：

[1] Univ Minho, Dept Phys, P-4710057 Braga, Portugal

[2] Belarusian State Univ, Physicochem Res Inst, Minsk 220000, BELARUS

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

来源：

MONATSHEFTE FUR CHEMIE | 2002年 / 133卷 / 06期

关键词：

UV/Vis spectroscopy; nanostructure; exciton; absorption;

D O I：

10.1007/s007060200061

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We present the results of a comparative analysis of the absorption and photoluminescence excitation (PLE) spectra vs. integrated photoluminescence (IPL) measured as a function of the excitation wavelength for a number of samples containing II-VI semiconductor nanocrystals (NCs) produced by different techniques. The structure of the absorption and PL spectra due to excitons confined in NCs and difficulties with the correct interpretation of the transmittance and PLE results are discussed. It is shown that, compared to the conventional PLE, the IPL intensity plotted against the excitation wavelength (EPLE spectra) reproduce better the structure of the absorption spectra. Therefore, IPLE spectroscopy can be successfully used for probing the quantized electron-hole (e-h) transitions in semiconductor nanocrystals.

引用

页码：909 / 918

页数：10

共 17 条

[1] Evolution from individual to collective electron states in a dense quantum dot ensemble [J].