scholarly journals Nanostructures GaAs solar cells

2020 ◽  
Author(s):  
Mohammad Nur E Alam ◽  
Narottam Das
Keyword(s):  
Power Generation ◽  
Solar Cells ◽  
Conversion Efficiency ◽  
Human Mobility ◽  
Incident Light ◽  
Front Surface ◽  
Pv Systems ◽  
Energy Demands ◽  
Power Generation Technology ◽  
Pv Power Generation

At present, the world is now passing a very far different time than normal situation due to the COVID-19 pandemic crisis. The global life-style and human civilization is currently progressing with down-stream that affecting almost every sectors necessary for human civilizations except the current environmental situation. To control the COVID-19 spreading, most of the countries are following lockdown process that reduces human mobility, thus reducing the CO2 emission to the environment. Though the COVID-19 pandemic is a blessing for the present environment, however, the post-COVID world will face a massive thrust of energy and only conventional energy resources may not be enough to mitigate the energy demands. Solar power generation technology mainly the photovoltaic (PV) systems and their advancement can be the leading possibilities to minimize the gap between the power demand and generation. It is now time to think how we can improve the PV power generation in future and the post-COVID world. In this encyclopaedia communication, we report on Nano-technological approach to improve the conversion efficiency of GaAs solar cells. We have designed and optimized several types of nano-structured assemblies that can be implemented to reduce the front surface incident light reflection losses thus can assist to improve the conversion efficiency of GaAs solar cells.

scholarly journals Nanostructures GaAs Solar Cells

2020 ◽  
Author(s):  
Mohammad Nur E Alam ◽  
Narottam Das
Keyword(s):  
Power Generation ◽  
Solar Cells ◽  
Conversion Efficiency ◽  
Human Mobility ◽  
Incident Light ◽  
Front Surface ◽  
Pv Systems ◽  
Energy Demands ◽  
Power Generation Technology ◽  
Pv Power Generation

At present, the world is now passing a very far different time than normal situation due to the COVID-19 pandemic crisis. The global life-style and human civilization is currently progressing with down-stream that affecting almost every sectors necessary for human civilizations except the current environmental situation. To control the COVID-19 spreading, most of the countries are following lockdown process that reduces human mobility, thus reducing the CO2 emission to the environment. Though the COVID-19 pandemic is a blessing for the present environment, however, the post-COVID world will face a massive thrust of energy and only conventional energy resources may not be enough to mitigate the energy demands. Solar power generation technology mainly the photovoltaic (PV) systems and their advancement can be the leading possibilities to minimize the gap between the power demand and generation. It is now time to think how we can improve the PV power generation in future and the post-COVID world. In this encyclopaedia communication, we report on Nano-technological approach to improve the conversion efficiency of GaAs solar cells. We have designed and optimized several types of nano-structured assemblies that can be implemented to reduce the front surface incident light reflection losses thus can assist to improve the conversion efficiency of GaAs solar cells.

New Trends in Solar Cells

2012 ◽  
pp. 1-21
Author(s):  
Masafumi Yamaguchi ◽  
Laurentiu Fara
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Current Status ◽  
Solar Photovoltaics ◽  
Energy Technologies ◽  
Power Generation Technology ◽  
The Cost ◽  
Conversion Efficiencies ◽  
Further Development ◽  
Pv Power Generation

Photovoltaic (PV) power generation technology is one of the most promising renewable energy technologies because of the possibility of solving environmental problems and limited sources of energy. In order to realize widespread deployment of solar photovoltaics and contribute to further development in civilization, further development in the science and technology of PV is very important. That is, further improvements in conversion efficiencies and reliability and lowering the cost of solar cells and modules are necessary. Regarding conversion efficiencies of solar cells, because there is the Shockley–Queisser conversion efficiency limit of 31% at 1-sun and 41% under concentration for single bandgap solar cells, several approaches to overcome the Shockley–Queisser limit should be made. This book will provide readers some guidance to overcome the limit. This chapter presents the current status of solar cells and new trends in solar cells from the viewpoint of conversion efficiency.

scholarly journals Algorithm Study on Improving Application Efficiency of Independent Solar Power Supply System

2016 ◽  
Vol 3 (1) ◽  
pp. 5
Author(s):  
Jigang Cao
Keyword(s):  
Power Generation ◽  
Maximum Power Point Tracking ◽  
Maximum Power ◽  
Maximum Power Point ◽  
Pv Systems ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Important Means ◽  
Power Point ◽  
Pv Power Generation

<p class="p1"><span class="s1">With the development of photovoltaic (PV) technologies, applications of photovoltaic have grown rapidly, indicating that the photovoltaic are attractive to produce environmentally benign electricity for diversified purposes. In order to maximize the use of solar energy, this thesis focuses on the PV power generation systems, which includes modeling of PV systems, maximum power point tracking (MPPT) methods for PV arrays. </span><span class="s1">Maximum Power Point Tracking (MPPT) method is an important means to improve the system efficiency of PV power generation system. MPPT theory and various MPPT algorithms are introduced in the literature. Based on those researches, this thesis proposes a novel implementation of an adaptive duty cycle P&amp;O algorithm that can reduce the main drawbacks commonly related to the traditional P&amp;O method.</span></p>

The Research on Solar Cells Based on Improving Conversion Efficiency

2015 ◽  
Vol 730 ◽  
pp. 173-177
Author(s):  
Yu Wen Tang
Keyword(s):  
Power Generation ◽  
Solar Cells ◽  
Solar Cell ◽  
Solar Energy ◽  
Conversion Efficiency ◽  
Photovoltaic Effect ◽  
New Technology ◽  
Electrical Energy ◽  
Solar Thermal Energy ◽  
Photovoltaic Power

Solar energy is an inexhaustible and renewable energy without environmental pollution. Solar energy can be used in three kinds of forms: solar thermal energy, photochemical conversion and photovoltaic power generation. Among these, the final form of photovoltaic power generation is electricity which can be transported, applied and stored conveniently. On the basis of photovoltaic effect, solar cell is developed as a new technology to convert light energy into electrical energy using semiconductor. Up to now the two key problems of the development of solar cells are how to improve the conversion efficiency and reduce cost. Therefore, the material and production technology used for solar cells are discussed based on improving conversion efficiency in this article.

scholarly journals Preparation and Characterization of High Performance Dye Sensitized Solar Cells with Silver Nanoparticles in nanocomposite Photoanode

2020 ◽  
pp. 7-11
Author(s):  
Eli Danladi ◽  
Jamila Tasiu ◽  
Lucky Endas
Keyword(s):  
Silver Nanoparticles ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Incident Light ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Reference Device ◽  
Sensitized Solar Cells

Surface plasmon resonance is the effect of electron oscillation in a structure stimulated by incident light. When noble materials such as Ag, Au or Cu are added into the titania (compact or mesoporous) structure of the sensitized solar cell, the plasmonic effect of such materials will result an improved performance of the device. Placing AgNPs at different position will produce a variety of result. In this work the systematic design and formation of plasmonic dye sensitized solar cells (DSSCs) by integrating Ag NPs nanoparticles (NPs) in two distinct configurations; on the c-TiO2 and on m-TiO2 were reported. The power conversion efficiency (PCE), Jsc and Voc of the reference device shows a value of 0.36 %, 1.89 mAcm-2 and 0.45 V. Upon introduction of AgNPs on the c-TiO2, a PCE of 0.64 %, Jsc of 2.53 mAcm-2 and Voc of 0.46 V were recorded, which improved the PCE ~ 63.90 % over that of the prestine device. When AgNPs is introduced on the m-TiO2, a PCE of 0.71 %, Jsc of 2.83 mAcm-2 and Voc of 0.46 V were obtained which which results to increase in power conversion efficiency (PCE) from 0.36 % to 0.71 %, demonstrating ~1.97 time’s enhancement, compared with the reference device without the metal NPs. The improvement is attributed to an increase in photocurrent density due to enhanced light harvesting by silver nanoparticles.

Simulation About Suitable Direction of Photovoltaic Array for Residential Solar Power Generation System

Solar Energy ◽  
2003 ◽  
Author(s):  
Koji Sakai ◽  
Osamu Ishihara ◽  
Akio Tanaka ◽  
Hidetoshi Nakagami ◽  
Masaki Manabe
Keyword(s):  
Power Generation ◽  
Tilt Angle ◽  
Generation System ◽  
Pv Systems ◽  
Photovoltaic Array ◽  
Solar Power Generation ◽  
Installation Angle ◽  
Power Generation System ◽  
Pv Power Generation ◽  
Fixed System

In this paper, it is attempted in the present study to estimate the factors to reduce power generating efficiency using the results of measurements and to calculate the optimal tilt angle in Kyushu area. Also, the study was made as to how the annual power generation amount is influenced by the deviation of the optimal tilt angle from actual installation angle. We have obtained the results that modeling was performed on the factors to reduce the efficiency obtained from measurements, and PV power generation amount in Kyushu area was estimated. Also, from the results of calculation of the optimal installation angle of the fixed system at installation site, it was demonstrated that the installation of PV systems on roof surface as generally practiced at present did not lead to a greater loss.

Surface-Texturing of Single-Crystalline Silicon Wafers

2011 ◽  
Vol 479 ◽  
pp. 124-131 ◽  
Author(s):  
Jian Yang Lin ◽  
Pai Yu Chang ◽  
Chih Kai Hu ◽  
Bin Hon Wu
Keyword(s):  
Solar Cells ◽  
Crystalline Silicon ◽  
Incident Light ◽  
Surface Texturing ◽  
Front Surface ◽  
Anisotropic Etching ◽  
Silicon Wafers ◽  
Surface Reflectance ◽  
Single Crystalline Silicon ◽  
Single Crystalline

In this work, alkaline-based anisotropic etchants, tetramethylammonium hydroxide (TMAH) and potassium hydroxide (KOH)/isopropyl alcohol (IPA) solutions, have been used for the surface texturing of the single-crystalline silicon wafers used for solar cells. The pyramid morphology produced by the surface texturing can reduce the surface reflection of the incident light and increase the light absorption so that the efficiency of the solar cells can be increased. The experimental data shows that the optimized surface texturing has been obtained with 5 wt. % TMAH anisotropic etching at 80 °C. The surface reflectance of the polished front surface can be reduced to 17 % and the surface reflectance of the unpolished backside surface can be reduced to 3 %, respectively. This result shows that the anisotropic etching can effectively reduce the surface reflectance. While for the surface texturing with KOH/IPA mixture, the front surface reflectance can only be reduced to 35 % and the backside surface reflectance can only be reduced to 5 %, respectively. Besides, debris of Si nano-crystals exists around the pyramid base area when texturing with the KOH/IPA mixture.

An Optimized MPP Tracking Algorithm under Partially Shaded Conditions in Photovoltaic System

2013 ◽  
Vol 860-863 ◽  
pp. 201-209
Author(s):  
Qing Zhong ◽  
Nan Hua Yu ◽  
Kun Wang ◽  
Lin Feng ◽  
Guo Jie Li ◽  
...  
Keyword(s):  
Power Generation ◽  
Tracking Algorithm ◽  
Photovoltaic System ◽  
The Real ◽  
Pv Systems ◽  
Pv Array ◽  
Simulation And Experiment ◽  
Improved Performance ◽  
Power Generation Systems ◽  
Pv Power Generation

In photovoltaic (PV) power generation systems, the P-V curve of PV array contains several peaks under partially shaded condition (PSC) so that conventional MPP tracking (MPPT) methods can hardly find the real MPP (MPP). This paper proposes an optimized MPPT strategy, which is not only fit for PSC but also suitable for uniform shaded conditions (USC). Comparing the optimized MPPT strategies and conventional MPPT methods, this paper illustrates the improved performance of optimized strategy under PSC. The simulation and experiment results show that the optimized strategy can track the global MPP precisely to improve the efficiency of PV systems.

Sign in / Sign up

Export Citation Format

Share Document