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

2001 ◽  
Vol 668 ◽  
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.

scholarly journals Optical Properties and Dielectric Functions of Grain Boundaries and Interfaces in CdTe Thin-Film Solar Cells

2019 ◽  
Vol 2 (2) ◽  
pp. 1419-1427 ◽  
Author(s):  
Budhika G. Mendis ◽  
Quentin M. Ramasse ◽  
Thomas P. Shalvey ◽  
Jonathan D. Major ◽  
Ken Durose
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Solar Cells ◽  
Grain Boundaries ◽  
Thin Film Solar Cells ◽  
Cdte Thin Film

The Chloride Annealing for Back Contact Layer Free CdTe Solar Cells

2016 ◽  
Vol 852 ◽  
pp. 799-804
Author(s):  
Meng Jiang ◽  
Zuo Lei Liu ◽  
Zhi Lei ◽  
Qiong Yi Gu ◽  
Jian Guo Zhu
Keyword(s):  
Solar Cells ◽  
Annealing Temperature ◽  
Annealing Treatment ◽  
Contact Layer ◽  
Solution Concentration ◽  
Back Contact ◽  
Cdte Thin Film ◽  
Large Area ◽  
Cdte Solar Cells ◽  
Cdte Surface

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.

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

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.

scholarly journals Effect ofIn SituThermal Annealing on Structural, Optical, and Electrical Properties of CdS/CdTe Thin Film Solar Cells Fabricated by Pulsed Laser Deposition

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Alaa Ayad Al-mebir ◽  
Paul Harrison ◽  
Ali Kadhim ◽  
Guanggen Zeng ◽  
Judy Wu
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Solar Cells ◽  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Thin Film Solar Cells ◽  
Cdte Thin Film ◽  
Cdte Solar Cells ◽  
Cdte Thin Films

Anin situthermal annealing process (iTAP) has been introduced before the commonex situcadmium chloride (CdCl2) annealing to improve crystal quality and morphology of the CdTe thin films after pulsed laser deposition of CdS/CdTe heterostructures. A strong correlation between the two annealing processes was observed, leading to a profound effect on the performance of CdS/CdTe thin film solar cells. Atomic force microscopy and Raman spectroscopy show that the iTAP in the optimal processing window produces considerable CdTe grain growth and improves the CdTe crystallinity, which results in significantly improved optoelectronic properties and quantum efficiency of the CdS/CdTe solar cells. A power conversion efficiency of up to 7.0% has been obtained on thin film CdS/CdTe solar cells of absorber thickness as small as 0.75 μm processed with the optimal iTAP at 450°C for 10–20 min. This result illustrates the importance of controlling microstructures of CdTe thin films and iTAP provides a viable approach to achieve such a control.

Evaluation of CdS/CdTe thin film solar cells: SCAPS thickness simulation and analysis of optical properties

2019 ◽  
Vol 92 ◽  
pp. 319-329 ◽  
Author(s):  
L.I. Nykyruy ◽  
R.S. Yavorskyi ◽  
Z.R. Zapukhlyak ◽  
G. Wisz ◽  
P. Potera
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Solar Cells ◽  
Thin Film Solar Cells ◽  
Cdte Thin Film
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