Characterising quantum dot concentrators

被引：3

作者：

Chatten, AJ ^{[1
]}

Barnham, KWJ ^{[1
]}

Blieske, U ^{[1
]}

Ekins-Daukes, NJ ^{[1
]}

Malik, MA ^{[1
]}

Marques, JL ^{[1
]}

Williams, ML ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2BW, England

来源：

CONFERENCE RECORD OF THE TWENTY-EIGHTH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE - 2000 | 2000年

关键词：

D O I：

10.1109/PVSC.2000.916020

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Luminescent collectors have advantages over geometric concentrators in that tracking is unnecessary and both direct and diffuse radiation can be collected. However, their development has been limited by the performance of luminescent dyes. We have recently proposed a novel concentrator in which the dyes are replaced by quantum dots (QDs). The advantages over dyes are: the absorption threshold can be tuned by choice of dot diameter, the red-shift between absorption and luminescence is related to the spread of dot sizes and high luminescence quantum efficiency (QE) has been observed. In this paper we discuss how we have adapted a thermodynamic model to allow for re-absorption in QDs. We find that the amount of overlap of the absorption and luminescence has a strong effect on the efficiency. We will show how to use the model to characterise the QDs and the concentrator by measuring the luminescence as a function of position.

引用

页码：865 / 868

页数：4

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