Electrical Characterization of Cu Composition Effects in CdS/CdTe Thin-Film Solar Cells with a ZnTe:Cu Back Contact: Preprint

Electrical Characterization of Cu Composition Effects in CdS/CdTe Thin-Film Solar Cells with a ZnTe:Cu Back Contact: Preprint

Research output: Contribution to conference › Paper

Abstract

We study the effects of Cu composition on the CdTe/ZnTe:Cu back contact and the bulk CdTe. For the back contact, its potential barrier decreases with Cu concentration while its saturation current density increases. For the bulk CdTe, the hole density increases with Cu concentration. We identify a Cu-related deep level at0.55 eV whose concentration is significant when the Cu concentration ishigh. The device performance, which initially increases with Cu concentration then decreases, reflects the interplay between the positive influences and negative influences (increasing deep levels in CdTe) of Cu.

Original language	American English
Number of pages	8
State	Published - 2012
Event	2012 IEEE Photovoltaic Specialists Conference - Austin, Texas Duration: 3 Jun 2012 → 8 Jun 2012

Conference

Conference	2012 IEEE Photovoltaic Specialists Conference
City	Austin, Texas
Period	3/06/12 → 8/06/12

NREL Publication Number

NREL/CP-5200-54125

Keywords

admittance measurement
capacitance voltage (CV)
CdTe
charge carrier density
contacts
defects

Access to Document

https://www.nrel.gov/docs/fy12osti/54125.pdf

Cite this

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title = "Electrical Characterization of Cu Composition Effects in CdS/CdTe Thin-Film Solar Cells with a ZnTe:Cu Back Contact: Preprint",

abstract = "We study the effects of Cu composition on the CdTe/ZnTe:Cu back contact and the bulk CdTe. For the back contact, its potential barrier decreases with Cu concentration while its saturation current density increases. For the bulk CdTe, the hole density increases with Cu concentration. We identify a Cu-related deep level at0.55 eV whose concentration is significant when the Cu concentration ishigh. The device performance, which initially increases with Cu concentration then decreases, reflects the interplay between the positive influences and negative influences (increasing deep levels in CdTe) of Cu.",

keywords = "admittance measurement, capacitance voltage (CV), CdTe, charge carrier density, contacts, defects",

author = "NREL",

year = "2012",

language = "American English",

note = "2012 IEEE Photovoltaic Specialists Conference ; Conference date: 03-06-2012 Through 08-06-2012",

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T1 - Electrical Characterization of Cu Composition Effects in CdS/CdTe Thin-Film Solar Cells with a ZnTe:Cu Back Contact: Preprint

AU - NREL, null

PY - 2012

Y1 - 2012

N2 - We study the effects of Cu composition on the CdTe/ZnTe:Cu back contact and the bulk CdTe. For the back contact, its potential barrier decreases with Cu concentration while its saturation current density increases. For the bulk CdTe, the hole density increases with Cu concentration. We identify a Cu-related deep level at0.55 eV whose concentration is significant when the Cu concentration ishigh. The device performance, which initially increases with Cu concentration then decreases, reflects the interplay between the positive influences and negative influences (increasing deep levels in CdTe) of Cu.

AB - We study the effects of Cu composition on the CdTe/ZnTe:Cu back contact and the bulk CdTe. For the back contact, its potential barrier decreases with Cu concentration while its saturation current density increases. For the bulk CdTe, the hole density increases with Cu concentration. We identify a Cu-related deep level at0.55 eV whose concentration is significant when the Cu concentration ishigh. The device performance, which initially increases with Cu concentration then decreases, reflects the interplay between the positive influences and negative influences (increasing deep levels in CdTe) of Cu.

KW - admittance measurement

KW - capacitance voltage (CV)

KW - CdTe

KW - charge carrier density

KW - contacts

KW - defects

M3 - Paper

T2 - 2012 IEEE Photovoltaic Specialists Conference

Y2 - 3 June 2012 through 8 June 2012

ER -

Electrical Characterization of Cu Composition Effects in CdS/CdTe Thin-Film Solar Cells with a ZnTe:Cu Back Contact: Preprint

Abstract

Conference

NREL Publication Number

Keywords

Access to Document

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Cite this