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

Leontiadou, MA, Tyrrell, EJ, Smith, CT, Espinbarro-Velasquez, D, Miloszewski, JM, Walsh, TJE, Binks, D and Tomic, S 2016, 'Influence of elevated radiative lifetime on efficiency of CdSe/CdTe Type II colloidal quantum dot based solar cells' , Solar Energy Materials and Solar Cells, 159 , pp. 657-663.

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Abstract

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·pk·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.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Solar Energy Materials and Solar Cells
Publisher: Elsevier
ISSN: 0927-0248
Related URLs:
Funders: Engineering and Physical Sciences Research Council (EPSRC)
Depositing User: WM Taylor
Date Deposited: 18 Jan 2016 15:43
Last Modified: 23 Nov 2017 01:21
URI: http://usir.salford.ac.uk/id/eprint/37795

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