scholarly journals Development of a method for producing effective CdS/CdTe/Cu/Au solar elements on a flexible substrate designed for backup supplying systems prevention of emergency situations

2021 ◽  
Vol 6 (5 (114)) ◽  
Author(s):  
Iryna Borysenko ◽  
Olexandr Burmenko ◽  
Natalya Deyneko ◽  
Oleksandr Zobenko ◽  
Yurii Yivzhenko ◽  
...  
Keyword(s):  
Solar Cells ◽  
Chemical Etching ◽  
Flexible Substrate ◽  
Base Layer ◽  
Emergency Situations ◽  
Device Structures ◽  
Treatment Analysis ◽  
Chloride Treatment ◽  
Nitrogen Phosphorus ◽  
Transverse Cleavage

The technology of forming film solar cells based on CdS / CdTe configuration of the "superstrat" type on a flexible substrate has been improved. To increase the efficiency of the developed solar cells on a flexible substrate, a chemical etching procedure in a nitrogen-phosphorus mixture was added to the traditional "chemical treatment". The conducted studies of the output parameters of the developed device structures showed that the highest values are observed in the case of chemical etching, both before the "chloride treatment" and after it. In the course of the study, it was found that a mandatory procedure in the formation of effective device structures is chemical etching in a nitrogen-phosphorus mixture both before the "chloride treatment" and after it. Carrying out the described procedures made it possible to obtain solar cells on a flexible substrate with an efficiency of 13.1 %. The increase in the efficiency of solar cells with two-stage chemical etching can be explained by the formation of excess tellurium on the surface, which leads to a decrease in resistance and, therefore, to a more efficient penetration of chlorine during the subsequent chloride treatment. Analysis of the transverse cleavage of the investigated device structures demonstrates significant grain growth and surface smoothness of the base layer, which ensures good adhesion with back contact. A study of the degradation resistance of the developed device structures during operation has been carried out. It was found that the obtained solar cells based on CdTe on a flexible substrate have a high degradation resistance and after 10 bending cycles there is no decrease in the output parameters. Thus, it has been established that chemical etching in a nitrogen-phosphorus mixture is a mandatory procedure for the formation of efficient solar cells on a flexible substrate.

scholarly journals Development of a method for obtaining a CdS/CdTe/Cu/Au module on a flexible substrate designed for backup supplying systems prevention of emergency situations

2021 ◽  
Vol 1 (5 (109)) ◽  
pp. 31-36
Author(s):  
Natalia Deyneko ◽  
Sergey Yeremenko ◽  
Gennady Kamyshentsev ◽  
Igor Kryvulkin ◽  
Mykola Matiushenko ◽  
...  
Keyword(s):  
Solar Cells ◽  
Cadmium Telluride ◽  
Flexible Substrate ◽  
Maximum Efficiency ◽  
Security Systems ◽  
Emergency Situations ◽  
Tunnel Contact ◽  
In Series ◽  
The Creation ◽  
Polyamide Film

The study of methods for obtaining base layers of cadmium telluride for the creation of efficient solar cells on a flexible substrate, intended for backup power supply of security systems and facility control. Considering that the polyamide film is stable up to a temperature of 450 °С, the formation of the base layers of solar cells based on cadmium telluride on flexible polyamide substrates was carried out by the method of DC magnetron sputtering. Using the chosen method, experimental samples of micromodules on a flexible substrate with series-connected solar cells based on CdS/CdTe/Cu/Au were obtained. To understand the effect of the failure of one or more solar cells on the efficiency of the entire micromodule during operation, an analysis of the initial parameters and light diode characteristics of individual solar cells of micromodules was carried out. The design of the micromodules, in which the solar cells were connected in series, made it possible to separately measure their output parameters. It was found that the creation of a Cu/Au rear tunnel contact made it possible to obtain high values of the output parameters for individual solar cells, but the micromodule contains a limitation by a shunted solar cell. However, the greatest role in reducing the efficiency of the entire micromodule is played by ineffective absorption of radiation when passing through the polyamide film, which led to a decrease in the efficiency of the entire micromodule, in which there is a shunted element, to 3.9 %. The maximum efficiency of the obtained samples of micromodules was 5.3 %

Microcrystalline (Si,Ge):H Solar Cells

2003 ◽  
Vol 762 ◽  
Author(s):  
Jianhua Zhu ◽  
Vikram L. Dalal
Keyword(s):  
Solar Cells ◽  
Buffer Layer ◽  
Quantum Efficiency ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Defect Density ◽  
Cell Structure ◽  
Open Circuit ◽  
Base Layer ◽  
Ecr Plasma

AbstractWe report on the growth and properties of microcrystalline Si:H and (Si,Ge):H solar cells on stainless steel substrates. The solar cells were grown using a remote, low pressure ECR plasma system. In order to crystallize (Si,Ge), much higher hydrogen dilution (∼40:1) had to be used compared to the case for mc-Si:H, where a dilution of 10:1 was adequate for crystallization. The solar cell structure was of the p+nn+ type, with light entering the p+ layer. It was found that it was advantageous to use a thin a-Si:H buffer layer at the back of the cells in order to reduce shunt density and improve the performance of the cells. A graded gap buffer layer was used at the p+n interface so as to improve the open-circuit voltage and fill factor. The open circuit voltage and fill factor decreased as the Ge content increased. Quantum efficiency measurements indicated that the device was indeed microcrystalline and followed the absorption characteristics of crystalline ( Si,Ge). As the Ge content increased, quantum efficiency in the infrared increased. X-ray measurements of films indicated grain sizes of ∼ 10nm. EDAX measurements were used to measure the Ge content in the films and devices. Capacitance measurements at low frequencies ( ~100 Hz and 1 kHz) indicated that the base layer was indeed behaving as a crystalline material, with classical C(V) curves. The defect density varied between 1x1016 to 2x1017/cm3, with higher defects indicated as the Ge concentration increased.

Structure and Optical Properties CdS and CdTe Films on Flexible Substrate Obtained by DC Magnetron Sputtering for Solar Cells

2017 ◽  
Vol 9 (5) ◽  
pp. 05035-1-05035-6 ◽  
Author(s):  
G. I. Kopach ◽  
◽  
R. P. Mygushchenko ◽  
G. S. Khrypunov ◽  
A. I. Dobrozhan ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Cells ◽  
Magnetron Sputtering ◽  
Flexible Substrate ◽  
Dc Magnetron Sputtering ◽  
Cdte Films

Micro- and Nanotextured Silicon for Antireflective Coatings of Solar Cells

2016 ◽  
Vol 39 ◽  
pp. 89-95 ◽  
Author(s):  
Anatoly Druzhinin ◽  
Valery Yerokhov ◽  
Stepan Nichkalo ◽  
Yevhen Berezhanskyi
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Silicon Substrate ◽  
Chemical Etching ◽  
Silicon Surface ◽  
Crystalline Silicon ◽  
Silicon Surfaces ◽  
Antireflective Coatings ◽  
High Conversion Efficiency ◽  
Industrial Use

The paper deals with obtaining of textured silicon surfaces by chemical etching. As a result of experiments based on the modification and optimization of obtaining a textured silicon, several methods of chemical texturing of the crystalline silicon surface were developed. It was shown that modified isotropic and anisotropic etching methods are applicable to create a microrelief on the surface of silicon substrate. These methods in addition to their high conversion efficiency can be used for both mono- and multicrystalline silicon which would ensure their industrial use.

scholarly journals Development of polymer–fullerene solar cells

2016 ◽  
Vol 3 (2) ◽  
pp. 222-239 ◽  
Author(s):  
Fengling Zhang ◽  
Olle Inganäs ◽  
Yinhua Zhou ◽  
Koen Vandewal
Keyword(s):  
Solar Cells ◽  
Bulk Heterojunction ◽  
Polymer Solar Cells ◽  
Power Conversion ◽  
Free Charge Carrier ◽  
Interfacial Layers ◽  
New Device ◽  
Device Structures ◽  
Photoactive Materials ◽  
Conversion Efficiencies

Abstract Global efforts and synergetic interdisciplinary collaborations on solution-processed bulk-heterojunction polymer solar cells (PSCs or OPVs) made power conversion efficiencies over 10% possible. The rapid progress of the field is credited to the synthesis of a large number of novel polymers with specially tunable optoelectronic properties, a better control over the nano-morphology of photoactive blend layers, the introduction of various effective interfacial layers, new device architectures and a deeper understanding of device physics. We will review the pioneering materials for polymer–fullerene solar cells and trace the progress of concepts driving their development. We discuss the evolution of morphology control, interfacial layers and device structures fully exploring the potential of photoactive materials. In order to guide a further increase in power conversion efficiency of OPV, the current understanding of the process of free charge carrier generation and the origin of the photovoltage is summarized followed by a perspective on how to overcome the limitations for industrializing PSCs.

scholarly journals Evaluation of AA-CVD deposited phase pure polymorphs of SnS for thin films solar cells

RSC Advances ◽  
2019 ◽  
Vol 9 (26) ◽  
pp. 14899-14909 ◽  
Author(s):  
Ibbi Y. Ahmet ◽  
Maxim Guc ◽  
Yudania Sánchez ◽  
Markus Neuschitzer ◽  
Victor Izquierdo-Roca ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Solar Cells ◽  
Selective Deposition ◽  
Device Structures ◽  
Phase Pure

Polymorph selective deposition of α- and π-SnS enables their evaluation as thin film PV absorber layers in various device structures.

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