Imperial College London
Alternate

Dr N.J. (Ned) Ekins-Daukes

Faculty of Natural Sciences, Department of Physics

Academic Visitor
 
 
 
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Contact

 

+44 (0)20 7594 6675n.ekins-daukes Website

 
 
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Location

 

H1002Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Alonso:2019:10.1016/j.solmat.2019.110051,
author = {Alonso, Alvarez D and Augusto, A and Pearce, P and Ferre, Llin L and Mellor, A and Bowden, S and Paul, D and Ekins-Daukes, N},
doi = {10.1016/j.solmat.2019.110051},
journal = {Solar Energy Materials and Solar Cells},
pages = {1--7},
title = {Thermal emissivity of silicon heterojunction solar cells},
url = {http://dx.doi.org/10.1016/j.solmat.2019.110051},
volume = {201},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The aim of this work is to evaluate whether silicon heterojunction solar cells, lacking highly emissive, heavily doped silicon layers, could be better candidates for hybrid photovoltaic thermal collectors than standard aluminium-diffused back contact solar cells. To this end, the near and mid infrared emissivity of full silicon heterojunction solar cells, as well as of its constituent materials – crystalline silicon wafer, indium tin oxide, n-, i- and p-type amorphous silicon – have been assessed by means of ellipsometry and FTIR. The experimental results show that the thermal emissivity of these cells is actually as high as in the more traditional structures, ~80% at 8μm. Detailed optical modelling combining raytracing and transfer matrix formalism shows that the emissivity in these cells originates in the transparent conductive oxide layers themselves, where the doping is not high enough to result in a reflection that exceeds the increased free carrier absorption. Further modelling suggests that it is possible to obtain lower emissivity solar cells, but that a careful optimization of the transparent conductive layer needs to be done to avoid hindering the photovoltaic performance.
AU  - Alonso,Alvarez D
AU  - Augusto,A
AU  - Pearce,P
AU  - Ferre,Llin L
AU  - Mellor,A
AU  - Bowden,S
AU  - Paul,D
AU  - Ekins-Daukes,N
DO  - 10.1016/j.solmat.2019.110051
EP  - 7
PY  - 2019///
SN  - 0927-0248
SP  - 1
TI  - Thermal emissivity of silicon heterojunction solar cells
T2  - Solar Energy Materials and Solar Cells
UR  - http://dx.doi.org/10.1016/j.solmat.2019.110051
UR  - https://www.sciencedirect.com/science/article/pii/S0927024819303800?via%3Dihub
UR  - http://hdl.handle.net/10044/1/71895
VL  - 201
ER  -
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