A study towards the possibility of ultra thin Cds/CdTe high efficiency solar cells from numerical analysis

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Abstract

Polycrystalline cadmium telluride (CdTe) is the leading material for realization of low cost and high efficiency solar cell for terrestrial use. In this work, a conventional structure of CdTe thin film solar cells [1] was investigated and conversion efficiency as high as 13.2% was achieved with the CdTe baseline structure of SnO2/CdS/CdTe. To explore the possibility of ultra thin and high efficiency CdS/CdTe solar cells, the CdTe absorber layer and CdS window layer were decreased to the extreme limit and 1 μm thin CdTe layer is found to show reasonable range of efficiency with stability. Moreover, it was found that there were scopes to increase cell efficiency by reducing the cadmium sulfide (CdS) window layer thickness. The CdS window layer was reduced to 60 nm together with the insertion of zinc oxide (ZnO) or zinc stannate (Zn2SnO4) as the buffer layer to prevent forward leakage current. All the simulations have been done using Analysis of Microelectronic and Photonic Structures (AMPS 1D) simulator. The maximum conversion efficiency of 18.3% (Voc = 1.00 V, Jsc = 26.15 mA/cm2, FF = 0.769) was achieved with 1 μm-CdTe absorber layer, 60 nm-CdS window layer and 100 nm of ZnO or Zn2SnO4 buffer layer. Furthermore, it was found that the cell normalized efficiency linearly decreased with the increasing operating temperature at the gradient of -0.4%/°C, which indicated better stability of the CdS/CdTe solar cells.

Original languageEnglish
Pages (from-to)571-580
Number of pages10
JournalWSEAS Transactions on Environment and Development
Volume6
Issue number8
Publication statusPublished - Aug 2010

Fingerprint

Cadmium telluride
telluride
Cadmium sulfide
Numerical analysis
Solar cells
cadmium
efficiency
sulfide
Zinc Oxide
Buffer layers
Zinc oxide
Conversion efficiency
microelectronics
cadmium telluride
analysis
solar cell
zinc
cadmium sulfide
Microelectronics
Leakage currents

Keywords

  • AMPS 1D
  • Cds
  • CdTe
  • High efficiency
  • Thin film solar photovoltaics
  • Zinc oxide
  • Zinc stannate

ASJC Scopus subject areas

  • Environmental Science(all)
  • Geography, Planning and Development
  • Energy(all)

Cite this

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title = "A study towards the possibility of ultra thin Cds/CdTe high efficiency solar cells from numerical analysis",
abstract = "Polycrystalline cadmium telluride (CdTe) is the leading material for realization of low cost and high efficiency solar cell for terrestrial use. In this work, a conventional structure of CdTe thin film solar cells [1] was investigated and conversion efficiency as high as 13.2{\%} was achieved with the CdTe baseline structure of SnO2/CdS/CdTe. To explore the possibility of ultra thin and high efficiency CdS/CdTe solar cells, the CdTe absorber layer and CdS window layer were decreased to the extreme limit and 1 μm thin CdTe layer is found to show reasonable range of efficiency with stability. Moreover, it was found that there were scopes to increase cell efficiency by reducing the cadmium sulfide (CdS) window layer thickness. The CdS window layer was reduced to 60 nm together with the insertion of zinc oxide (ZnO) or zinc stannate (Zn2SnO4) as the buffer layer to prevent forward leakage current. All the simulations have been done using Analysis of Microelectronic and Photonic Structures (AMPS 1D) simulator. The maximum conversion efficiency of 18.3{\%} (Voc = 1.00 V, Jsc = 26.15 mA/cm2, FF = 0.769) was achieved with 1 μm-CdTe absorber layer, 60 nm-CdS window layer and 100 nm of ZnO or Zn2SnO4 buffer layer. Furthermore, it was found that the cell normalized efficiency linearly decreased with the increasing operating temperature at the gradient of -0.4{\%}/°C, which indicated better stability of the CdS/CdTe solar cells.",
keywords = "AMPS 1D, Cds, CdTe, High efficiency, Thin film solar photovoltaics, Zinc oxide, Zinc stannate",
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AU - Matin, M. A.

AU - Amin, Nowshad

AU - Zaharim, Azami

AU - Sopian, Kamaruzzaman

PY - 2010/8

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N2 - Polycrystalline cadmium telluride (CdTe) is the leading material for realization of low cost and high efficiency solar cell for terrestrial use. In this work, a conventional structure of CdTe thin film solar cells [1] was investigated and conversion efficiency as high as 13.2% was achieved with the CdTe baseline structure of SnO2/CdS/CdTe. To explore the possibility of ultra thin and high efficiency CdS/CdTe solar cells, the CdTe absorber layer and CdS window layer were decreased to the extreme limit and 1 μm thin CdTe layer is found to show reasonable range of efficiency with stability. Moreover, it was found that there were scopes to increase cell efficiency by reducing the cadmium sulfide (CdS) window layer thickness. The CdS window layer was reduced to 60 nm together with the insertion of zinc oxide (ZnO) or zinc stannate (Zn2SnO4) as the buffer layer to prevent forward leakage current. All the simulations have been done using Analysis of Microelectronic and Photonic Structures (AMPS 1D) simulator. The maximum conversion efficiency of 18.3% (Voc = 1.00 V, Jsc = 26.15 mA/cm2, FF = 0.769) was achieved with 1 μm-CdTe absorber layer, 60 nm-CdS window layer and 100 nm of ZnO or Zn2SnO4 buffer layer. Furthermore, it was found that the cell normalized efficiency linearly decreased with the increasing operating temperature at the gradient of -0.4%/°C, which indicated better stability of the CdS/CdTe solar cells.

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