Insights into post-growth doping and proposals for CdTe:In photovoltaic devices

Thomas, Luke, Hobson, Theo DC, Phillips, Laurie J ORCID: 0000-0001-5181-1565, Cheetham, Kieran J, Tarbuck, Neil, Jones, Leanne AH, Smiles, Matt J ORCID: 0000-0003-2530-5647, Don, Chris H, Thakur, Pardeep K, Isaacs, Mark
et al (show 7 more authors) (2022) Insights into post-growth doping and proposals for CdTe:In photovoltaic devices. JOURNAL OF PHYSICS-ENERGY, 4 (4). 045001-045001.

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<jats:title>Abstract</jats:title> <jats:p>This paper is motivated by the potential advantages of higher doping and lower contact barriers in CdTe photovoltaic devices that may be realized by using n-type rather than the conventional p-type solar absorber layers. We present post-growth doping trials for indium in thin polycrystalline CdTe films using the diffusion of indium metal with indium chloride. Chemical concentrations of indium up to 10<jats:sup>19</jats:sup> cm<jats:sup>−3</jats:sup> were achieved and the films were verified as n-type by hard x-ray photoemission. Post-growth chlorine treatment (or InCl<jats:sub>3</jats:sub>) was found to compensate the n-doping. Trial structures comprising CdS/CdTe:In verified that the doped absorber structures performed as expected both before and after chloride treatment, but it is recognized that this is not an optimum combination. Hence, in order to identify how the advantages of n-type absorbers might be fully realized in future work, we also report simulations of a range of p–n junction combinations with n-CdTe, a number of which have the potential for high <jats:italic>V</jats:italic> <jats:sub>oc</jats:sub>.</jats:p>

Item Type: Article
Uncontrolled Keywords: thin film solar cell, photovoltaics, cadmium telluride, n-type absorber, doping, indium
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 13 Jul 2022 14:03
Last Modified: 18 Jan 2023 20:56
DOI: 10.1088/2515-7655/ac7ad5
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