Effects of Cd 1-x Zn x S alloy composition and post-deposition air anneal on ultra-thin CdTe solar cells produced by MOCVD

Andrew Clayton; Mark Baker; Shumalia Babar; R. Grilli; P. N. Gibson; Giray Kartopu; David Lamb; Vincent Barrioz; Stuart Irvine

doi:10.1016/j.matchemphys.2017.01.067

Effects of Cd 1-x Zn x S alloy composition and post-deposition air anneal on ultra-thin CdTe solar cells produced by MOCVD

Andrew Clayton, Mark Baker, Shumalia Babar, R. Grilli, P. N. Gibson, Giray Kartopu, David Lamb, Vincent Barrioz, Stuart Irvine

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

17 Downloads (Pure)

Abstract

Ultra-thin CdTe:As/Cd1-xZnxS photovoltaic solar cells with an absorber thickness of 0.5 μm were deposited by metal-organic chemical vapour deposition on indium tin oxide coated boro-aluminosilicate substrates. The Zn precursor concentration was varied to compensate for Zn leaching effects after CdCl2 activation treatment. Analysis of the solar cell composition and structure by X-ray photoelectron spectroscopy depth profiling and X-ray diffraction showed that higher concentrations of Zn in the Cd1-xZnxS window layer resulted in suppression of S diffusion across the CdTe/Cd1-xZnxS interface after CdCl2 activation treatment. Excessive Zn content in the Cd1-xZnxS alloy preserved the spectral response in the blue region of the solar spectrum, but increased series resistance for the solar cells. A modest increase in the Zn content of the Cd1-xZnxS alloy together with a post-deposition air anneal resulted in an improved blue response and an enhanced open circuit voltage and fill factor. This device yielded a mean efficiency of 8.3% over 8 cells (0.25 cm2 cell area) and best cell efficiency of 8.8%.

Original language	English
Pages (from-to)	244-252
Journal	Materials Chemistry and Physics
Volume	192
Early online date	25 Jan 2017
DOIs	https://doi.org/10.1016/j.matchemphys.2017.01.067
Publication status	Published - 1 May 2017

Keywords

MOCVD
CdTe
XPS
XRD
Photovoltaics

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.matchemphys.2017.01.067Licence: CC BY

1-s2Final published version, 2.5 MBLicence: CC BY

https://doi.org/10.1016/j.matchemphys.2017.01.067Licence: CC BY

Cite this

@article{4943ed1def584b68adc4d26bb5336852,

title = "Effects of Cd 1-x Zn x S alloy composition and post-deposition air anneal on ultra-thin CdTe solar cells produced by MOCVD",

abstract = "Ultra-thin CdTe:As/Cd1-xZnxS photovoltaic solar cells with an absorber thickness of 0.5 μm were deposited by metal-organic chemical vapour deposition on indium tin oxide coated boro-aluminosilicate substrates. The Zn precursor concentration was varied to compensate for Zn leaching effects after CdCl2 activation treatment. Analysis of the solar cell composition and structure by X-ray photoelectron spectroscopy depth profiling and X-ray diffraction showed that higher concentrations of Zn in the Cd1-xZnxS window layer resulted in suppression of S diffusion across the CdTe/Cd1-xZnxS interface after CdCl2 activation treatment. Excessive Zn content in the Cd1-xZnxS alloy preserved the spectral response in the blue region of the solar spectrum, but increased series resistance for the solar cells. A modest increase in the Zn content of the Cd1-xZnxS alloy together with a post-deposition air anneal resulted in an improved blue response and an enhanced open circuit voltage and fill factor. This device yielded a mean efficiency of 8.3\% over 8 cells (0.25 cm2 cell area) and best cell efficiency of 8.8\%.",

keywords = "MOCVD, CdTe, XPS, XRD, Photovoltaics",

author = "Andrew Clayton and Mark Baker and Shumalia Babar and R. Grilli and Gibson, \{P. N.\} and Giray Kartopu and David Lamb and Vincent Barrioz and Stuart Irvine",

year = "2017",

month = may,

day = "1",

doi = "10.1016/j.matchemphys.2017.01.067",

language = "English",

volume = "192",

pages = "244--252",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Effects of Cd 1-x Zn x S alloy composition and post-deposition air anneal on ultra-thin CdTe solar cells produced by MOCVD

AU - Clayton, Andrew

AU - Baker, Mark

AU - Babar, Shumalia

AU - Grilli, R.

AU - Gibson, P. N.

AU - Kartopu, Giray

AU - Lamb, David

AU - Barrioz, Vincent

AU - Irvine, Stuart

PY - 2017/5/1

Y1 - 2017/5/1

N2 - Ultra-thin CdTe:As/Cd1-xZnxS photovoltaic solar cells with an absorber thickness of 0.5 μm were deposited by metal-organic chemical vapour deposition on indium tin oxide coated boro-aluminosilicate substrates. The Zn precursor concentration was varied to compensate for Zn leaching effects after CdCl2 activation treatment. Analysis of the solar cell composition and structure by X-ray photoelectron spectroscopy depth profiling and X-ray diffraction showed that higher concentrations of Zn in the Cd1-xZnxS window layer resulted in suppression of S diffusion across the CdTe/Cd1-xZnxS interface after CdCl2 activation treatment. Excessive Zn content in the Cd1-xZnxS alloy preserved the spectral response in the blue region of the solar spectrum, but increased series resistance for the solar cells. A modest increase in the Zn content of the Cd1-xZnxS alloy together with a post-deposition air anneal resulted in an improved blue response and an enhanced open circuit voltage and fill factor. This device yielded a mean efficiency of 8.3% over 8 cells (0.25 cm2 cell area) and best cell efficiency of 8.8%.

AB - Ultra-thin CdTe:As/Cd1-xZnxS photovoltaic solar cells with an absorber thickness of 0.5 μm were deposited by metal-organic chemical vapour deposition on indium tin oxide coated boro-aluminosilicate substrates. The Zn precursor concentration was varied to compensate for Zn leaching effects after CdCl2 activation treatment. Analysis of the solar cell composition and structure by X-ray photoelectron spectroscopy depth profiling and X-ray diffraction showed that higher concentrations of Zn in the Cd1-xZnxS window layer resulted in suppression of S diffusion across the CdTe/Cd1-xZnxS interface after CdCl2 activation treatment. Excessive Zn content in the Cd1-xZnxS alloy preserved the spectral response in the blue region of the solar spectrum, but increased series resistance for the solar cells. A modest increase in the Zn content of the Cd1-xZnxS alloy together with a post-deposition air anneal resulted in an improved blue response and an enhanced open circuit voltage and fill factor. This device yielded a mean efficiency of 8.3% over 8 cells (0.25 cm2 cell area) and best cell efficiency of 8.8%.

KW - MOCVD

KW - CdTe

KW - XPS

KW - XRD

KW - Photovoltaics

UR - https://www.scopus.com/pages/publications/85014657649

U2 - 10.1016/j.matchemphys.2017.01.067

DO - 10.1016/j.matchemphys.2017.01.067

M3 - Article

SN - 0254-0584

VL - 192

SP - 244

EP - 252

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

ER -

Effects of Cd 1-x Zn x S alloy composition and post-deposition air anneal on ultra-thin CdTe solar cells produced by MOCVD

Abstract

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this