Laboratory Stand for Examining the Influence of Environmental Conditions on Electrical Parameters of Photovoltaic Cells

2016 ◽  
Vol 1 (8) ◽  
pp. 178-181 ◽  
Author(s):  
Piotr BILLEWICZ
Keyword(s):  
Environmental Conditions ◽  
Photovoltaic Cells ◽  
Electrical Parameters

scholarly journals A Microtester for Measuring the Reliability of Microdevices in Controlled Environmental Conditions

Micromachines ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 585
Author(s):  
Yunjia Li ◽  
Weitao Dou ◽  
Chenyuan Zhou ◽  
Xinyi Wang ◽  
Aijun Yang ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Environmental Parameters ◽  
Test System ◽  
Standard Test ◽  
Electrical Parameters ◽  
Vibration Energy Harvester ◽  
Electromagnetic Vibration ◽  
Small Footprint ◽  
Humidity Range ◽  
Decoupling Algorithm

A miniaturized reliability test system for microdevices with controlled environmental parameters is presented. The system is capable of measuring key electrical parameters of the microdevices while controlling the environmental conditions around the microdevices. The test system is compact and thus can be integrated with standard test equipment for microdevices. By using a feed-forward decoupling algorithm, the presented test system is capable of generating a temperature range of 0–120 °C and a humidity range of 20–90% RH (0–55 °C), within a small footprint and weight. The accuracy for temperature and humidity control is ±0.1 °C and ±1% RH (30 °C), respectively. The functionality of the proposed test system is verified by integrating it with a piezo shaker to test the environmental reliability of an electromagnetic vibration energy harvester. The proposed system can be used as a proof-of-technology platform for characterizing the performance of microdevices with controlled environmental parameters.

Electrical parameters of solar cells with electrodes made by selective metallization

2016 ◽  
Vol 33 (1) ◽  
pp. 36-41 ◽  
Author(s):  
Piotr Kowalik ◽  
Edyta Wrobel ◽  
Janusz Mazurkiewicz
Keyword(s):  
Sheet Resistance ◽  
Acidic Solution ◽  
Low Cost ◽  
Photovoltaic Cells ◽  
Electrical Parameters ◽  
Solution Ph ◽  
Content Type ◽  
Composition And Structure ◽  
Electroless Metallization ◽  
Made In

Purpose – This paper aims to present the results of measurements of the photovoltaic structures made by electroless selective metallization technology. The developed technology provides low-cost contacts in any form, and parameters of photovoltaic cells made in this technology provide reliable results, comparable with those usually used. Design/methodology/approach – In this paper, photovoltaic cells with contacts based on Nip and NiCuP alloy were performed. As a substrate, mono- and multicristaline silicon was used. After photovoltaic cells have been prepared, sheet resistance of the contact layers and electrical parameters were measured. Composition and structure of contact layers were also measured. Findings – Obtained results of sheet resistance and contact layers are repeatable and comparable with previously published results. Electrical parameters of the photovoltaic cells made are comparable with used substrate and technologies. The authors have also noticed that the costs of the electroless metallization which is used to make contact layers is lower than metallization made by thick film or vacuum deposition technologies. Originality/value – The paper presents new, unpublished results of electrical parameters of photovoltaic cells with contact layers made by electroless metallization. The original idea is the usage of metallization in an acidic solution (pH = 2). In this proposed technology, photovoltaic cells on mono- and multicrystalline silicon plates were performed.

scholarly journals Effects of Environmental Conditions and Composition on the Electrical Properties of Textile Fabrics

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5145 ◽  
Author(s):  
José Torreblanca González ◽  
Raúl García Ovejero ◽  
Álvaro Lozano Murciego ◽  
Gabriel Villarrubia González ◽  
Juan F. De Paz
Keyword(s):  
Electrical Conductivity ◽  
Electrical Resistivity ◽  
Electrical Properties ◽  
Environmental Conditions ◽  
Data Capture ◽  
Influential Factor ◽  
Climatic Chamber ◽  
Electrical Parameters ◽  
Dc Electrical Conductivity ◽  
Textile Fabrics

In our day to day life, the environmental conditions, and especially the temperature and humidity of the air that surrounds us, go unnoticed. However, in many cases, these parameters play an important role in the use of materials since they modify their electrical properties. It is necessary to predict what this behaviour will be as these environmental conditions can introduce or improve desirable properties in the material, especially of textiles. The nature of these is to be dielectric, and therefore have a minimal DC electrical conductivity that is currently impossible to measure directly, so a methodology has been proposed to obtain the DC electrical resistivity through the method of discharging a condenser. For this purpose, a system was developed based on a static voltmeter, a climatic chamber and a control and data capture units. In order to validate the proposed system and methodology a study using both is described in this work. The study made it possible to verify that the most influential factor in establishing the values of the electrical parameters of a textile material is the nature of the fibres of which it is composed, although the influence of environmental conditions in fibres is also significant.

Theoretical Performance Characteristics of Wearable Thermoelectric Generators

2010 ◽  
Vol 74 ◽  
pp. 9-14 ◽  
Author(s):  
Vladimir Leonov
Keyword(s):  
Ambient Temperature ◽  
Human Body ◽  
Environmental Conditions ◽  
Thermoelectric Generator ◽  
Photovoltaic Cells ◽  
Performance Characteristics ◽  
Thermoelectric Generators ◽  
Heat Generator ◽  
Theoretical Performance

The theory of thermal matching of a thermoelectric generator with the environment has been applied in this work to a wearable thermoelectric generator. This enabled evaluation of its top performance characteristics in typical environmental conditions. To correctly perform the modeling, the relevant properties of the human body as a heat generator for a small-size thermoelectric generator have been studied and presented in the paper as well. The results have been practically validated in different wearable thermoelectric generators. In particular, a power over 1 mW per square centimeter of the skin has been practically demonstrated on a walking person at ambient temperature of –2 °C. The comparison with wearable photovoltaic cells shows that in typical situations thermoelectric generators provide at least ten times more power.

scholarly journals The Effect of Cooling on the Performance of Photovoltaic Cells under Dusty Environmental Conditions

2014 ◽  
Vol 61 ◽  
pp. 2383-2386 ◽  
Author(s):  
A. Aldihani ◽  
A. Aldossary ◽  
S. Mahmoud ◽  
R.K. AL-Dadah
Keyword(s):  
Environmental Conditions ◽  
Photovoltaic Cells

scholarly journals Changes in the characteristics of silicon photovoltaic cells of solar arrays after current overloads

2019 ◽  
pp. 19-25 ◽  
Author(s):  
A. V. Ivanchenko ◽  
A. S. Tonkoshkur
Keyword(s):  
Short Circuit ◽  
Photovoltaic Cells ◽  
Short Circuit Current ◽  
Photovoltaic Cell ◽  
Open Circuit ◽  
Time Range ◽  
Electrical Parameters ◽  
Solar Arrays ◽  
Current Voltage ◽  
Recent Emergence

Recently, much attention has been paid to the study of the influence of current overloads and local overheating on the degradation of the electrical characteristics of the photovoltaic components of solar arrays. First of all, it is connected with the tasks of increasing the reliability and durability of the operation of such renewable sources of electrical energy. Such studies are of particular interest due to the recent emergence of new methods and devices for improving the reliability of solar arrays by isolating inactive (defective or shaded) areas of their photovoltaic components (photovoltaic cells and photovoltaic modules). This paper presents the research results on the influence of current overloads on the current-voltage and volt-watt characteristics and the electrical parameters of photovoltaic cells of solar arrays based on monocrystalline silicon. The testing was performed using the cyclic current overload mode, which is the flow of electric breakdown current passed through the back-turned diode of a photovoltaic cell for several seconds. After that, the photovoltaic cell was cooled to room temperature, and then its current-voltage and volt-watt characteristics were measured. The degradation (decrease) of all the basic electrical parameters of photovoltaic cells (open-circuit voltage, short-circuit current, filling factor of the current-voltage characteristic, and maximum power) has been established. The additive nature of the changes and the average relative decrease of the indicated electrical parameters for one breakdown cycle are determined. Comparison of the response time range of the PolySwitch fuses with the breakdown durations of photovoltaic cells is performed. The conclusion is drawn about the prospect of using such resettable fuses as protection in emergency situations that are associated with current overloads in solar arrays.

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