High-Efficiency Polycrystalline CdTe Thin-Film Solar Cells with an Oxygenated Amorphous CdS (a-CdS:O) Window Layer: Preprint

High-Efficiency Polycrystalline CdTe Thin-Film Solar Cells with an Oxygenated Amorphous CdS (a-CdS:O) Window Layer: Preprint

Research output: Contribution to conference › Paper

Abstract

In the conventional CdS/CdTe device structure, the poly-CdS window layer has a bandgap of~2.4 eV, which causes absorption in the short-wavelength region. Higher short-circuit current densities (Jsc) can be achieved by reducing the CdS thickness, but this can adversely impact device open-circuit voltage (Voc) and fill factor (FF). Also, poly-CdS film has about 10% lattice mismatch related to theCdTe film, which limits the improvement of device Voc and FF. In this paper, we report a novel window material: oxygenated amorphous CdS film (a-CdS:O) prepared at room temperature by rf sputtering. The a-CdS:O film has a higher optical bandgap (2.5-3.1 eV) than the poly-CdS film and an amorphous structure. The preliminary device results have demonstrated that Jsc of the CdTe device can begreatly improved while maintaining higher Voc and FF. We have fabricated a CdTe cell demonstrating an NREL-confirmed Jsc of 25.85 mA/cm2 and a total-area efficiency of 15.4%.

Original language	American English
Number of pages	7
State	Published - 2002
Event	29th IEEE PV Specialists Conference - New Orleans, Louisiana Duration: 20 May 2002 → 24 May 2002

Conference

Conference	29th IEEE PV Specialists Conference
City	New Orleans, Louisiana
Period	20/05/02 → 24/05/02

Bibliographical note

Prepared for the 29th IEEE PV Specialists Conference, 20-24 May; 2002, New Orleans, Louisiana

NREL Publication Number

NREL/CP-520-31429

Keywords

atomic force microscopy (AFM)
cadmium telluride (CdTe) photovoltaic solar cells modules
high-efficiency polycrystalline
oxygenated amorphous cds
photoemission spectroscopy (XPS)
PV
raman spectra
short-wavelength region
solar cells
thin film
X-ray diffraction

UN SDGs

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

Access to Document

https://www.nrel.gov/docs/fy02osti/31429.pdf

Cite this

@conference{de39bfdcc6b5482f84181d1e00d35568,

title = "High-Efficiency Polycrystalline CdTe Thin-Film Solar Cells with an Oxygenated Amorphous CdS (a-CdS:O) Window Layer: Preprint",

abstract = "In the conventional CdS/CdTe device structure, the poly-CdS window layer has a bandgap of~2.4 eV, which causes absorption in the short-wavelength region. Higher short-circuit current densities (Jsc) can be achieved by reducing the CdS thickness, but this can adversely impact device open-circuit voltage (Voc) and fill factor (FF). Also, poly-CdS film has about 10% lattice mismatch related to theCdTe film, which limits the improvement of device Voc and FF. In this paper, we report a novel window material: oxygenated amorphous CdS film (a-CdS:O) prepared at room temperature by rf sputtering. The a-CdS:O film has a higher optical bandgap (2.5-3.1 eV) than the poly-CdS film and an amorphous structure. The preliminary device results have demonstrated that Jsc of the CdTe device can begreatly improved while maintaining higher Voc and FF. We have fabricated a CdTe cell demonstrating an NREL-confirmed Jsc of 25.85 mA/cm2 and a total-area efficiency of 15.4%.",

keywords = "atomic force microscopy (AFM), cadmium telluride (CdTe) photovoltaic solar cells modules, high-efficiency polycrystalline, oxygenated amorphous cds, photoemission spectroscopy (XPS), PV, raman spectra, short-wavelength region, solar cells, thin film, X-ray diffraction",

author = "NREL",

note = "Prepared for the 29th IEEE PV Specialists Conference, 20-24 May; 2002, New Orleans, Louisiana; 29th IEEE PV Specialists Conference ; Conference date: 20-05-2002 Through 24-05-2002",

year = "2002",

language = "American English",

}

TY - CONF

T1 - High-Efficiency Polycrystalline CdTe Thin-Film Solar Cells with an Oxygenated Amorphous CdS (a-CdS:O) Window Layer: Preprint

AU - NREL, null

N1 - Prepared for the 29th IEEE PV Specialists Conference, 20-24 May; 2002, New Orleans, Louisiana

PY - 2002

Y1 - 2002

N2 - In the conventional CdS/CdTe device structure, the poly-CdS window layer has a bandgap of~2.4 eV, which causes absorption in the short-wavelength region. Higher short-circuit current densities (Jsc) can be achieved by reducing the CdS thickness, but this can adversely impact device open-circuit voltage (Voc) and fill factor (FF). Also, poly-CdS film has about 10% lattice mismatch related to theCdTe film, which limits the improvement of device Voc and FF. In this paper, we report a novel window material: oxygenated amorphous CdS film (a-CdS:O) prepared at room temperature by rf sputtering. The a-CdS:O film has a higher optical bandgap (2.5-3.1 eV) than the poly-CdS film and an amorphous structure. The preliminary device results have demonstrated that Jsc of the CdTe device can begreatly improved while maintaining higher Voc and FF. We have fabricated a CdTe cell demonstrating an NREL-confirmed Jsc of 25.85 mA/cm2 and a total-area efficiency of 15.4%.

AB - In the conventional CdS/CdTe device structure, the poly-CdS window layer has a bandgap of~2.4 eV, which causes absorption in the short-wavelength region. Higher short-circuit current densities (Jsc) can be achieved by reducing the CdS thickness, but this can adversely impact device open-circuit voltage (Voc) and fill factor (FF). Also, poly-CdS film has about 10% lattice mismatch related to theCdTe film, which limits the improvement of device Voc and FF. In this paper, we report a novel window material: oxygenated amorphous CdS film (a-CdS:O) prepared at room temperature by rf sputtering. The a-CdS:O film has a higher optical bandgap (2.5-3.1 eV) than the poly-CdS film and an amorphous structure. The preliminary device results have demonstrated that Jsc of the CdTe device can begreatly improved while maintaining higher Voc and FF. We have fabricated a CdTe cell demonstrating an NREL-confirmed Jsc of 25.85 mA/cm2 and a total-area efficiency of 15.4%.

KW - atomic force microscopy (AFM)

KW - cadmium telluride (CdTe) photovoltaic solar cells modules

KW - high-efficiency polycrystalline

KW - oxygenated amorphous cds

KW - photoemission spectroscopy (XPS)

KW - PV

KW - raman spectra

KW - short-wavelength region

KW - solar cells

KW - thin film

KW - X-ray diffraction

M3 - Paper

T2 - 29th IEEE PV Specialists Conference

Y2 - 20 May 2002 through 24 May 2002

ER -

High-Efficiency Polycrystalline CdTe Thin-Film Solar Cells with an Oxygenated Amorphous CdS (a-CdS:O) Window Layer: Preprint

Abstract

Conference

Bibliographical note

NREL Publication Number

Keywords

UN SDGs

Access to Document

Fingerprint

Cite this