Application of copper thiocyanate for high open‐circuit voltages of CdTe solar cells

Paudel, Naba R.; Yan, Yanfa

doi:10.1002/pip.2660

Title: Application of copper thiocyanate for high open‐circuit voltages of CdTe solar cells

Abstract

Abstract Copper thiocyanate (CuSCN) has proven to be a low‐cost, efficient hole‐transporting material for the emerging organic–inorganic perovskite solar cells. Herein, we report that CuSCN can also be applied to CdTe thin‐film solar cells to achieve high open‐circuit voltages ( V _OC s). By optimizing the thickness of the thermally evaporated CuSCN films, CdTe cells fabricated by close space sublimation in the superstrate configuration have achieved V _OC s as high as 872 mV, which is about 20–25 mV higher than the highest V _OC for the reference cells using the standard Cu/Au back contacts. CuSCN is a wide bandgap p ‐type conductor with a conduction band higher than that of CdTe, leading to a conduction band offset that reflects electrons in CdTe, partially explaining the improved V _OC s. However, due to the low conductivity of CuSCN, CdTe cells using CuSCN/Au back contacts exhibited slightly lower fill factors than the cells using Cu/Au back contacts. With optimized CdS:O window layers, the power conversion efficiency of the best CdTe cell, using CuSCN/Au back contact, is 14.7%: slightly lower than that of the best cell (15.2%) using Cu/Au back contact. Copyright © 2015 John Wiley & Sons, Ltd.

Authors:

Paudel, Naba R. ^[1]; Yan, Yanfa ^[1]

Department of Physics and Astronomy, Wright Center for Photovoltaics Innovation and Commercialization University of Toledo Toledo OH 43606 USA

Publication Date:: Wed Jul 22 00:00:00 EDT 2015

Sponsoring Org.:: USDOE

OSTI Identifier:: 1401147

Resource Type:: Publisher's Accepted Manuscript

Journal Name:: Progress in Photovoltaics

Additional Journal Information:: Journal Name: Progress in Photovoltaics Journal Volume: 24 Journal Issue: 1; Journal ID: ISSN 1062-7995

Publisher:: Wiley Blackwell (John Wiley & Sons)

Country of Publication:: United Kingdom

Language:: English

Citation Formats


                    Paudel, Naba R., and Yan, Yanfa. Application of copper thiocyanate for high open‐circuit voltages of CdTe solar cells.  United Kingdom: N. p., 2015. 
Web.  doi:10.1002/pip.2660.

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                    Paudel, Naba R., & Yan, Yanfa. Application of copper thiocyanate for high open‐circuit voltages of CdTe solar cells.  United Kingdom.  https://doi.org/10.1002/pip.2660

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                    Paudel, Naba R., and Yan, Yanfa. Wed .  
"Application of copper thiocyanate for high open‐circuit voltages of CdTe solar cells".  United Kingdom.  https://doi.org/10.1002/pip.2660.

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@article{osti_1401147,

  title        = {Application of copper thiocyanate for high open‐circuit voltages of CdTe solar cells},

  author       = {Paudel, Naba R. and Yan, Yanfa},

  abstractNote = {Abstract Copper thiocyanate (CuSCN) has proven to be a low‐cost, efficient hole‐transporting material for the emerging organic–inorganic perovskite solar cells. Herein, we report that CuSCN can also be applied to CdTe thin‐film solar cells to achieve high open‐circuit voltages ( V OC s). By optimizing the thickness of the thermally evaporated CuSCN films, CdTe cells fabricated by close space sublimation in the superstrate configuration have achieved V OC s as high as 872 mV, which is about 20–25 mV higher than the highest V OC for the reference cells using the standard Cu/Au back contacts. CuSCN is a wide bandgap p ‐type conductor with a conduction band higher than that of CdTe, leading to a conduction band offset that reflects electrons in CdTe, partially explaining the improved V OC s. However, due to the low conductivity of CuSCN, CdTe cells using CuSCN/Au back contacts exhibited slightly lower fill factors than the cells using Cu/Au back contacts. With optimized CdS:O window layers, the power conversion efficiency of the best CdTe cell, using CuSCN/Au back contact, is 14.7%: slightly lower than that of the best cell (15.2%) using Cu/Au back contact. Copyright © 2015 John Wiley & Sons, Ltd.},

  doi          = {10.1002/pip.2660},

  journal      = {Progress in Photovoltaics},

  number       = 1,

  volume       = 24,

  place        = {United Kingdom},

  year         = {Wed Jul 22 00:00:00 EDT 2015},

  month        = {Wed Jul 22 00:00:00 EDT 2015}

}

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Title: Application of copper thiocyanate for high open‐circuit voltages of CdTe solar cells

Abstract

Citation Formats

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