The Chloride Annealing for Back Contact Layer Free CdTe Solar Cells

The large area CdTe thin film samples were used for chloride annealing. The CuCl2/NH4Cl solution was attached on the CdTe surface. After annealing treatment, the CdTe solar cells were prepared. The structure of the thin films and the properties of the CdTe solar cells were tested for studying the effect of the ratio of Cu/Cl, solution concentration and the annealing temperature. At last the performance of CuCl2/NH4Cl annealing cells, ZnTe back contact cells and C:Te,Cu back contact cells were compared. Without back contact layers the efficiency of the CdTe solar cells reached 11.13% with chloride annealing.

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Synthesis of high-quality ZnTe:Cu films as a back contact layer for CdTe solar cells

10.1109/pvsc43889.2021.9518642 ◽

2021 ◽

Author(s):

Xinlu Lin ◽

Yufeng Zhang ◽

Ziyao Zhu ◽

Qiuchen Wu ◽

Xiangxin Liu

Keyword(s):

Solar Cells ◽

Contact Layer ◽

Back Contact ◽

High Quality ◽

Cdte Solar Cells

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CdCl2 Activation of the ZnTe:As Back Contact Layer in CdTe Thin Film Solar Cells, Employing a CdS Sacrificial Layer

2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) ◽

10.1109/pvsc40753.2019.8980552 ◽

2019 ◽

Author(s):

Ochai Oklobia ◽

Giray Kartopu ◽

Stuart J. C. Irvine

Keyword(s):

Thin Film ◽

Solar Cells ◽

Sacrificial Layer ◽

Contact Layer ◽

Thin Film Solar Cells ◽

Back Contact ◽

Cdte Thin Film

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First-principles Study of Back Contact Effects on CdTe Thin Film Solar Cells

MRS Proceedings ◽

10.1557/proc-1268-ee02-04 ◽

2010 ◽

Vol 1268 ◽

Author(s):

Mao-Hua Du

Keyword(s):

Thin Film ◽

Solar Cells ◽

First Principles ◽

Cell Performance ◽

Thin Film Solar Cells ◽

Back Contact ◽

Cdte Thin Film ◽

Solar Cell Performance ◽

Cdte Solar Cells ◽

P Type

AbstractForming a chemically stable low-resistance back contact for CdTe thin film solar cells is critically important to the cell performance. This paper reports theoretical study of the effects of the back contact material, Sb2Te3, on the performance of the CdTe solar cells. First-principles calculations show that Sb impurities in p-type CdTe are donors and can diffuse with low diffusion barrier. There properties are clearly detrimental to the solar cell performance. The Sb segregation into the grain boundaries may be required to explain the good efficiencies for the CdTe solar cells with Sb2Te3 back contacts.

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Structural and Optical Properties of Highly Efficient 2- μm Thick CdS/CdTe Thin Film Solar Cells

MRS Proceedings ◽

10.1557/proc-668-h6.3 ◽

2001 ◽

Vol 668 ◽

Cited By ~ 4

Author(s):

K. Nakamura ◽

M. Gotoh ◽

T. Fujihara ◽

T. Toyama ◽

H. Okamoto

Keyword(s):

Optical Properties ◽

Solar Cells ◽

Oxygen Concentration ◽

Annealing Temperature ◽

Uv Light ◽

Thin Film Solar Cells ◽

Cdte Thin Film ◽

Structural And Optical Properties ◽

Cdte Solar Cells ◽

Light Excitation

ABSTRACTThe structural and optical properties of CdS/CdTe(S) interface region of 2-μm thick CdS/CdTe solar cells have been studied in conjunction with photovoltaic performances of the solar cells. The properties are found to be crucially influenced by the annealing temperature and oxygen concentration of the CdCl2 treatment. An increase in VOC and F.F. found in the solar cells with the CdCl2 treatment at < 360°C is interpreted as due to suppression of interdiffusion of sulfur and tellurium at the CdS/CdTe(S) interface. On the other hand, the electromodulated photoluminescence with UV light excitation (UVE-EMPL) study reveals that the increasing VOC due to increasing oxygen concentration to 5% is likely to be caused by an increase in the built-in electric field in n+-CdTe1−xSx just adjacent to the CdS/CdTe(S) interface. As a result of the modification of the process parameters, we have achieved the conversion efficiency of 13.6% (VOC: 0.817V, JSC: 23.0 mA/cm2, F.F.: 0.725) using 2.3-μm thick PV active layer without anti-reflection coating.

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Application of bromide-iodide lead perovskite thin film as a copper-free back contact layer for CdTe solar cells

Solar Energy ◽

10.1016/j.solener.2021.11.005 ◽

2021 ◽

Vol 230 ◽

pp. 832-842

Author(s):

Biao Zhou ◽

Fan Zhang ◽

Junlin Zhang ◽

Xiutao Yang ◽

Kelin Li ◽

...

Keyword(s):

Thin Film ◽

Solar Cells ◽

Contact Layer ◽

Back Contact ◽

Cdte Solar Cells

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The Influence of Thickness on the Properties of Sb2Te3 Thin Films and its Application in CdS/CdTe Thin Film Solar Cells

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.225-226.789 ◽

2011 ◽

Vol 225-226 ◽

pp. 789-793

Author(s):

Song Bai Hu ◽

Rong Zhe Tang ◽

Cai Juan Tian ◽

Wei Li ◽

Liang Huan Feng ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Solar Cells ◽

Contact Layer ◽

Vacuum Evaporation ◽

Thin Film Solar Cells ◽

Back Contact ◽

Cdte Thin Film

Sb2Te3thin films with thickness of 70, 100, 300, and 600nm were co-evaporated by vacuum evaporation. These films were annealed by 423K, 473K, 523K and 573K, respectively, in the protection of N2ambient. After that, the film structures were investigated by XRD. Composition of the films was surveyed XRF and XPS. Stoichiometric Sb2Te3thin films were prepared. Then the Sb2Te3thin films were applied to CdTe thin film solar cells as back contact layer. The influence of Sb2Te3thin films thickness on the performances of CdS/CdTe thin film solar cells were surveyed by light I-V characteristics and an efficiency of 12.27%, Voc=808.2mV, Jsc=25.1mA/cm2, FF= 0.6051 was obtained.

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