Low cost Schottky barrier solar cells fabricated on CdSe and Sb[sub 2]S[sub 3] films chemically deposited with silicotungstic acid

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2059248· OSTI ID:6827621

Savadogo, O; Mandal, K C ^[1]

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1. Ecole Polytechnique de Montreal, Quebec (Canada). Dept. of Metallurgie et de Genie des Materiaux

A novel method for fabricating high efficiency metal (Pt, Au, and Ni)/(CdSe or Sb[sub 2]S[sub 3]) Schottky barrier solar cells is reported. The method is based on the fabrication of n-CdSe or Sb[sub 2]S[sub 3] thin films chemically deposited with and without silicotungstic acid (STA). The performances of the Schottky junctions fabricated with the films deposited with STA, CdSe(STA), or Sb[sub 2]S[sub 3](STA), are significantly higher than those deposited without STA. Under AM1 illumination, the photovoltaic properties of the improved Pt/CdSe(STA) diode showed V[sub oc] = 0.72 V, J[sub sc] = 14.1 mA/cm[sup 2], FF [approx equal] 0.70, and efficiency [eta] [approx equal] 7.2%. Analogous results are obtained on Pt/n-Sb[sub 2]S[sub 3](STA), where the photovoltaic response of the improved diode showed V[sub oc] = 0.63 V, J[sub sc] = 11.3 mA/cm[sup 2], FF [approx equal] 0.63, and [eta] [approx equal] 5.5%. The ideality factor (n) and saturation current density (J[sub 0]) were also significantly improved. C-V measurements at 1 MHz showed that the barrier height ([phi][sub b]) of the fabricated diodes are 0.62 and 0.59 eV for Pt/CdSe and Pt-Sb[sub 2]S[sub 3] junctions, respectively, and 0.81 and 0.80 eV for Pt/CdSe(STA) and Pt-Sb[sub 2]S[sub 3](STA) junctions, respectively. It is also observed that the [phi][sub b] values are independent of the metal work functions (W). This is attributed to the Fermi level pinning of CdSe or Sb[sub 2]S[sub 3] films deposited with and without STA.

• OSTI ID: 6827621
• Journal Information: Journal of the Electrochemical Society; (United States), Vol. 141:10; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
36 MATERIALS SCIENCE
ANTIMONY SULFIDES
CHEMICAL VAPOR DEPOSITION
CADMIUM SELENIDE SOLAR CELLS
FABRICATION
CADMIUM SELENIDES
SCHOTTKY BARRIER SOLAR CELLS
ENERGY EFFICIENCY
PHOTOVOLTAIC CONVERSION
ANTIMONY COMPOUNDS
CADMIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL COATING
CONVERSION
DEPOSITION
DIRECT ENERGY CONVERSION
DIRECT ENERGY CONVERTERS
EFFICIENCY
ENERGY CONVERSION
EQUIPMENT
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
SELENIDES
SELENIUM COMPOUNDS
SOLAR CELLS
SOLAR EQUIPMENT
SULFIDES
SULFUR COMPOUNDS
SURFACE COATING
140501* - Solar Energy Conversion- Photovoltaic Conversion
360601 - Other Materials- Preparation & Manufacture