Electrochemical synthesis of Cu-doped ZnTe films as back contacts to CdTe solar cells

Yongseok Jun, Kang Jin Kim, Donghwan Kim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Electrochemical deposition of Cu-doped ZnTe films was investigated as a back contact material for CdTe solar cells. The deposition system consisted of a potentiostat, a substrate (cathode), a Pt counter electrode, and an Ag/AgCl reference electrode. Experimental conditions were: pH=2.5∼4, deposition temperature=70 ∼80°C electrolyte concentration=0.02 M Zn 2+, 10 -4 M TeO 2, and deposition potential (V a) = -0.85 ∼-1.0 V vs. Ag/AgCl. A cyclic voltammogram obtained from an ITO substrate showed a ZnTe reduction peak at Va = -0.7 ∼ -0.9 V. A film obtained at pH=2.5, V a=-0.975 V showed the strongest ZnTe X-ray diffraction peak, but its surface morphology was not as smooth as the films made under the condition of pH=3∼4, V a=-0.950V. Triethanolamine did not form a complex with Cu 2+ in acidic solution as needed for uniform Cu-doping, but oxalate anion and 1,10-phenanthroline did at pH=2∼3. The efficiency of CdTe solar cells increased from 3.4% to 7.1% when Cu-doped ZnTe film was used as the back contact.

Original languageEnglish
Pages (from-to)279-285
Number of pages7
JournalMetals and Materials International
Volume5
Issue number3
Publication statusPublished - 1999 Jun 1

Fingerprint

electrochemical synthesis
Solar cells
solar cells
Triethanolamine
Electrodes
Oxalates
electrodes
oxalates
Substrates
ITO (semiconductors)
Electrolytes
Anions
Surface morphology
electric contacts
counters
Cathodes
Negative ions
cathodes
Doping (additives)
electrolytes

Keywords

  • Back contacts
  • CdTe
  • Electro deposition
  • Solar cells
  • ZnTe

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Electrochemical synthesis of Cu-doped ZnTe films as back contacts to CdTe solar cells. / Jun, Yongseok; Kim, Kang Jin; Kim, Donghwan.

In: Metals and Materials International, Vol. 5, No. 3, 01.06.1999, p. 279-285.

Research output: Contribution to journalArticle

@article{0e0ad6e14eee43d98a627f88e9241f1f,
title = "Electrochemical synthesis of Cu-doped ZnTe films as back contacts to CdTe solar cells",
abstract = "Electrochemical deposition of Cu-doped ZnTe films was investigated as a back contact material for CdTe solar cells. The deposition system consisted of a potentiostat, a substrate (cathode), a Pt counter electrode, and an Ag/AgCl reference electrode. Experimental conditions were: pH=2.5∼4, deposition temperature=70 ∼80°C electrolyte concentration=0.02 M Zn 2+, 10 -4 M TeO 2, and deposition potential (V a) = -0.85 ∼-1.0 V vs. Ag/AgCl. A cyclic voltammogram obtained from an ITO substrate showed a ZnTe reduction peak at Va = -0.7 ∼ -0.9 V. A film obtained at pH=2.5, V a=-0.975 V showed the strongest ZnTe X-ray diffraction peak, but its surface morphology was not as smooth as the films made under the condition of pH=3∼4, V a=-0.950V. Triethanolamine did not form a complex with Cu 2+ in acidic solution as needed for uniform Cu-doping, but oxalate anion and 1,10-phenanthroline did at pH=2∼3. The efficiency of CdTe solar cells increased from 3.4{\%} to 7.1{\%} when Cu-doped ZnTe film was used as the back contact.",
keywords = "Back contacts, CdTe, Electro deposition, Solar cells, ZnTe",
author = "Yongseok Jun and Kim, {Kang Jin} and Donghwan Kim",
year = "1999",
month = "6",
day = "1",
language = "English",
volume = "5",
pages = "279--285",
journal = "Metals and Materials International",
issn = "1598-9623",
publisher = "Korean Institute of Metals and Materials",
number = "3",

}

TY - JOUR

T1 - Electrochemical synthesis of Cu-doped ZnTe films as back contacts to CdTe solar cells

AU - Jun, Yongseok

AU - Kim, Kang Jin

AU - Kim, Donghwan

PY - 1999/6/1

Y1 - 1999/6/1

N2 - Electrochemical deposition of Cu-doped ZnTe films was investigated as a back contact material for CdTe solar cells. The deposition system consisted of a potentiostat, a substrate (cathode), a Pt counter electrode, and an Ag/AgCl reference electrode. Experimental conditions were: pH=2.5∼4, deposition temperature=70 ∼80°C electrolyte concentration=0.02 M Zn 2+, 10 -4 M TeO 2, and deposition potential (V a) = -0.85 ∼-1.0 V vs. Ag/AgCl. A cyclic voltammogram obtained from an ITO substrate showed a ZnTe reduction peak at Va = -0.7 ∼ -0.9 V. A film obtained at pH=2.5, V a=-0.975 V showed the strongest ZnTe X-ray diffraction peak, but its surface morphology was not as smooth as the films made under the condition of pH=3∼4, V a=-0.950V. Triethanolamine did not form a complex with Cu 2+ in acidic solution as needed for uniform Cu-doping, but oxalate anion and 1,10-phenanthroline did at pH=2∼3. The efficiency of CdTe solar cells increased from 3.4% to 7.1% when Cu-doped ZnTe film was used as the back contact.

AB - Electrochemical deposition of Cu-doped ZnTe films was investigated as a back contact material for CdTe solar cells. The deposition system consisted of a potentiostat, a substrate (cathode), a Pt counter electrode, and an Ag/AgCl reference electrode. Experimental conditions were: pH=2.5∼4, deposition temperature=70 ∼80°C electrolyte concentration=0.02 M Zn 2+, 10 -4 M TeO 2, and deposition potential (V a) = -0.85 ∼-1.0 V vs. Ag/AgCl. A cyclic voltammogram obtained from an ITO substrate showed a ZnTe reduction peak at Va = -0.7 ∼ -0.9 V. A film obtained at pH=2.5, V a=-0.975 V showed the strongest ZnTe X-ray diffraction peak, but its surface morphology was not as smooth as the films made under the condition of pH=3∼4, V a=-0.950V. Triethanolamine did not form a complex with Cu 2+ in acidic solution as needed for uniform Cu-doping, but oxalate anion and 1,10-phenanthroline did at pH=2∼3. The efficiency of CdTe solar cells increased from 3.4% to 7.1% when Cu-doped ZnTe film was used as the back contact.

KW - Back contacts

KW - CdTe

KW - Electro deposition

KW - Solar cells

KW - ZnTe

UR - http://www.scopus.com/inward/record.url?scp=0039445929&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0039445929&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0039445929

VL - 5

SP - 279

EP - 285

JO - Metals and Materials International

JF - Metals and Materials International

SN - 1598-9623

IS - 3

ER -