scholarly journals The Effect of Noise-Induced Quantum Coherence in the Intermediate Band Solar Cells

2021 ◽  
Author(s):  
Mohsen Daryani ◽  
Ali Rostami ◽  
Gaffar Darvish ◽  
Mohammad Kazem Morravej Farshi
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Output Power ◽  
Quantum Coherence ◽  
Maximum Output Power ◽  
Maximum Output ◽  
Incoherent Light ◽  
Intermediate Band ◽  
Intermediate Band Solar Cells ◽  
Coherence Effect

Abstract It has been shown that quantum coherence induced by incoherent light can increase the efficiency of solar cells. Here we evaluate the effect of such coherence in the intermediate band solar cells. We first examine a six-level quantum IBSC model and demonstrate by simulation that the maximum of output power in a solar cell with quantum structure increases more than 16 percent in the case of coherence existence. We then propose an IBSC model which can absorb continuous spectra of sunlight and show that the quantum coherence can increase the output power of the cell. For instance, calculations indicate that the coherence makes an increase of about 31% in the maximum output power of a cell that the width of the conduction and intermediate bands are 100 and 10 meV, respectively. Also, our calculations show that the quantum coherence effect is still observed in increasing the solar cell power by expanding the width of the conduction band, although the output power is reduced due to increase in the thermalization loss. However, expanding the width of the intermediate band reduces the coherence effect.

scholarly journals Tandem Solar Cells Based on Cu2O and c-Si Subcells in Parallel Configuration: Numerical Simulation

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Mihai Răzvan Mitroi ◽  
Valerică Ninulescu ◽  
Laurenţiu Fara
Keyword(s):  
Numerical Simulation ◽  
Solar Cells ◽  
Solar Cell ◽  
Output Power ◽  
High Efficiency ◽  
Low Cost ◽  
Maximum Output Power ◽  
Model Parameters ◽  
Maximum Output ◽  
Parallel Configuration

A tandem solar cell consisting of a bottom c-Si high-efficiency subcell and a top low-cost Cu2O subcell in parallel configuration is evaluated for the first time by a use of an electrical model. A numerical simulation based on the single-diode model of the solar cell is performed. The numerical method determines both the model parameters and the parameters of the subcells and tandem from the maximization of output power. The simulations indicate a theoretical limit value of the tandem power conversion efficiency of 31.23% at 298 K. The influence of temperature on the maximum output power is analyzed. This tandem configuration allows a great potential for the development of a new generation of low-cost high-efficiency solar cells.

Improvement in Power of Shingled Solar Cells for Photo-Voltaic Module

2020 ◽  
Vol 20 (11) ◽  
pp. 7096-7099
Author(s):  
Hongsub Jee ◽  
Jinho Song ◽  
Daehan Moon ◽  
Jaehyeong Lee ◽  
Chaehwan Jeong
Keyword(s):  
Solar Cells ◽  
Output Power ◽  
Current Density ◽  
Power Loss ◽  
Maximum Output Power ◽  
Photovoltaic Module ◽  
Maximum Output ◽  
Conductive Adhesives ◽  
Electrically Conductive ◽  
Electrically Conductive Adhesives

This paper presents a study on the effects of heat treatment conditions on electrically conductive adhesives. Among the advantages of the shingled solar cells include larger active area and smaller current density since one of the main factors of the power loss is due to a decrease in current density. Therefore, when there is a small current, there is a benefit in regards to the power loss. The advantage of this new technique of developing photovoltaic modules is the increase of module power using the same installed area. Electrically conductive adhesives play an important role in the manufacture of shingled solar cells and understanding the effects of its curing condition is necessary to maximize its output power. Through changing the curing time and temperature, the optimized curing conditions for electrically conductive adhesives and fabricated shingled strings for development of a module could be established. Finally, we demonstrated a 500 mm × 500 mm photovoltaic module with a conventional and the other using the shingled method for purposes of comparison and a shingled module showed about 29% increase in maximum output power compared to a conventional module with the same installed area.

scholarly journals The Effect of Solar Radiation and Temperature on Solar Cell Performance in Khartoum state

2021 ◽  
pp. 45-55
Author(s):  
Wail Hessen ALawad ALHessen ◽  
Abdelnabe Ali Elamin Ali ◽  
Mohammed Habib Ahmed El_kanzi
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Solar Radiation ◽  
Operating Temperature ◽  
Short Circuit ◽  
Maximum Output Power ◽  
Cell Performance ◽  
Maximum Output ◽  
Operation Condition ◽  
Solar Cell Performance

In this paper, the performance of solar cells was studied and evaluated . The role of several effects for operation condition such as temperature, sunlight intensity on the solar cells output parameters has been studied. Experimental results showed that relationship between the amount of solar cell output parameters variations such as maximum output power, open circuit voltage, short circuit current, and efficiency in terms of temperature and light intensity. The measurements were carried out for the intensity of solar radiation in Khartoum area in Sudan, from February month to April month which records the solar radiation in W/m2, The results were collected from 10 Am to 4 pm, three days per week, data were averaged and also illustrated in the form of graphs of solar radiation as a function of the time of the day. The operating temperature plays a key role in the photovoltaic conversion process. Both the electrical efficiency and the power output of the solar cell depend on the operating temperature. Solar cell performance decreases with increasing temperature.

scholarly journals Can Impurities be Beneficial to Photovoltaics?

2009 ◽  
Vol 156-158 ◽  
pp. 107-114
Author(s):  
Antonio Luque ◽  
Antonio Martí
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Quantum Dot ◽  
State Of The Art ◽  
The State ◽  
Bulk Materials ◽  
Intermediate Band ◽  
Intermediate Band Solar Cells

The state of the art of the intermediate band solar cells is presented with emphasis on the use of impurities or alloys to form bulk intermediate band materials. Quantum dot intermediate band solar cells start to present already attractive efficiencies but many difficulties jeopardize the immediate achievement of record efficiency cells. To complement this research it is worthwhile examining bulk materials presenting an IB. Four or perhaps more materials have already proven to have it and several paths for the research of more are today open but no solar cell has yet been published based on them. This topic has already attracted many researches and abundant funds for their development worldwide.

Research of Matching Power for Photovoltaic Charging Control System

2014 ◽  
Vol 620 ◽  
pp. 220-224
Author(s):  
Xin Sheng He ◽  
Zuo Cai Dai ◽  
Chun Fu Gao ◽  
Shao Tai Deng
Keyword(s):  
Solar Cells ◽  
Output Power ◽  
Solar Power ◽  
Maximum Output Power ◽  
Optimum Operating ◽  
Variable Step Size ◽  
Maximum Output ◽  
Resistive Load ◽  
Step Size ◽  
Load Matching

For the maximum output power varies with changes in load characteristics match the characteristics of solar cells in photovoltaic power generation system, the system runs through dynamic MPPT maximum power of self-optimizing process to achieve power from the PV charge control match. First, the output characteristic simulation analysis of the solar load resistive, capacitive load showed that solar power batteries for load matching efficiency is higher than in a purely resistive load. Then, using the improved algorithm for variable step size perturbation and observation of the received output power of solar power and load matching control, experiments showed that the optimum operating point of the circuit can control the real-time monitoring of solar cells and load. The output power from the battery load matching circuit to match the time working in the best working condition, if the energy is surplus or shortage, the system can control dynamic self-optimizing adjustment to charge, which leads to batteries absorbed power increasing and the efficiency of solar energy collection improving.

Simulation and On-Site Performance of a Novel 3D Concentrator for Photovoltaic Application

2013 ◽  
Vol 457-458 ◽  
pp. 1467-1473
Author(s):  
Peng Lei ◽  
Jun Yuan Lai ◽  
Jiong Ma ◽  
Peng Jin
Keyword(s):  
Solar Cell ◽  
Output Power ◽  
Silicon Solar Cell ◽  
Low Cost ◽  
Maximum Output Power ◽  
Maximum Output ◽  
Acceptance Angle ◽  
Solar Simulator ◽  
Poly Silicon ◽  
Photovoltaic Application

We presented a family of new 3D concentrators. Simulations showed they could significantly increase the illumination on objective plane compared with 2D trough concentrators. A 3D concentrator prototype with a nominal 35° half acceptance angle was made. Its performance was tested under an indoor solar simulator and by on-site experiment. Under solar simulator, a low cost poly-silicon solar cell coupled with a 3D concentrator achieved a 2.25 times of maximum output power compared with a similar bare solar cell. In the on-site experiment, poly-silicon solar cell with a 3D compound parabolic based reflective concentrator gained an average of 1.4 times maximum output power when the incidence sunlight within the critical angle.

scholarly journals Concentrating System’s Design and Performance Analysis for Spacial Solar Array

2018 ◽  
Vol 36 (3) ◽  
pp. 471-479
Author(s):  
Limin Shao ◽  
Shuli Yang
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Output Power ◽  
Open Circuit Voltage ◽  
Operating Temperature ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Solar Array ◽  
Maximum Output

A large area of sunlight onto solar cells is gathered by concentrating system for spacial concentrating solar array, which reduces the amount of solar cells by increasing light intensity onto the solar cells of the unit area. Under concentrating conditions, the short-circuit current, open-circuit voltage, fill factor, efficiency, operating temperature and strong thermal-electrical coupling characteristics of concentrating solar cells are different from the conventional solar cells because of the high intensity and high operating temperature. The concentrating module design, solar cell selection, and design of solar cell heat-dissipation have been carried out. The thermal-electric coupling model of special concentrating photovoltaic system has been established. The relationships among concentrated ratio, substrate-thickness, thermal conductivity of substrate-material and solar cell’s temperature, density of short-circuit current, open-circuit voltage, maximum output power have been analyzed, which provide a view to a reasonabl0e match and selection of multi-parameters in engineering design. Results show that the concentrated ratio has an overall effect on the open-circuit voltage, short-circuit current, efficiency and operating temperature of the solar cell. There is a strong coupling relationship among the parameters, and the positive and negative impacts caused by the concentrating characteristics should be weighed in the engineering design. The short-circuit current density of concentrating solar cells is proportional to the concentrated ratio. Under the lower concentrated ratio circumstance, fill factor and efficiency is not substantially affected by the concentrated ratio. The maximum output power and open-circuit voltage increase with the increase of concentrated ratio. Temperature of concentrating solar cells has an adverse effect on the open-circuit voltage, efficiency and output power, which needs high efficient radiator measures to be taken. The operating temperature of solar cells could be decreased significantly by the high thermal conductivity of the substrate-material. The concentrated ratio between 9~15 is recommended for spacial solar array, which not only embodies the advantage of concentrator like improving the cell-efficiency and decreasing the cost, but also doesn’t exact the deploying precision of concentrating system.

Efficiency Estimations for Multijunction and Intermediate Band Solar Cells Using Actual Measured Solar Spectra in Japan

2015 ◽  
Vol 137 (3) ◽  
Author(s):  
Shunya Naitoh ◽  
Yoshitaka Okada
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Equivalent Circuit ◽  
Triple Junction ◽  
Maximum Efficiency ◽  
Spectral Variation ◽  
Intermediate Band ◽  
Intermediate Band Solar Cell ◽  
Intermediate Band Solar Cells

An intermediate band solar cell (IBSC) whose equivalent circuit is similar to a multijunction (MJ) solar cell but with an additional parallel diode connection is shown to be more robust to spectral variation than a series-connected MJ solar cell. We have calculated the limiting efficiencies of IBSC and MJ solar cells using the measured solar spectra in Japan. Even though the maximum efficiency of an IBSC is lower than a triple junction (3J) solar cell at airmass (AM)1.5, the IBSC would generate more annual electricity by 1% than 3J cell at 1 sun, if they had been optimized at AM1.5.

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