Influence of elevated radiative lifetime on efficiency of CdSe/CdTe Type II colloidal quantum dot based solar cells

被引：24

作者：

Leontiadou, Marina A. ^{[1
,2
]}

Tyrrell, Edward J. ^{[3
]}

Smith, Charles T. ^{[1
,2
]}

Espinobarro-Velazquez, Daniel ^{[1
,2
]}

Page, Robert ^{[4
]}

O'Brien, Paul ^{[4
]}

Miloszewski, Jacek ^{[3
]}

Walsh, Thomas ^{[3
]}

Binks, David ^{[1
,2
]}

Tomic, Stanko ^{[3
]}

机构：

[1] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

[2] Univ Manchester, Photon Sci Inst, Manchester M13 9PL, Lancs, England

[3] Univ Salford, Sch Comp Sci & Engn, Joule Phys Lab, Manchester MS 4WT, Lancs, England

[4] Univ Manchester, Sch Chem, Manchester M13 9PL, Lancs, England

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2017年 / 159卷

基金：

英国工程与自然科学研究理事会;

关键词：

Efficiency; Solar cells; Colloidal quantum dots; Core/shell structure; MULTIPLE EXCITON GENERATION; PHOTOINDUCED ELECTRON-TRANSFER; CDSE NANOCRYSTALS; SEMICONDUCTOR NANOCRYSTALS; ORGANOMETALLIC SYNTHESIS; RECOMBINATION DYNAMICS; DIELECTRIC CONFINEMENT; OPTICAL-PROPERTIES; CDTE; CDTE/CDSE;

D O I：

10.1016/j.solmat.2016.01.018

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：

Colloidal quantum dots (CQDs) are promising materials for solar cells because their optoelectronic properties are easily adjusted by control of their size, structure and composition. We present calculations of the band gap and radiative lifetime for varying core diameter and shell thickness of CdSe/CdTe core/shell Type II CQDs using a combination of single particle (2,6)-band k p and many-electron configuration interaction (CI) Hamiltonians. These calculations are validated by comparison with experimental absorption spectra and photoluminescence decay data. The results are then incorporated into a model of photovoltaic efficiency which demonstrates how the overall performance of a solar cell based on Type II CQDs is affected by changes in the core/shell geometry. The largest effect on photovoltaic efficiency is found to be due to the longer radiative lifetime produced by increasing the shell thickness. (C) 2016 The Authors. Published by Elsevier B.V.

引用

页码：657 / 663

页数：7

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