• Title/Summary/Keyword: Concentrated photovoltaic solar cell

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A Study on the Fixed-Concentrating Hybrid Panel using Reflector (반사판을 이용한 고정식 집속형 복합 Panel에 대한 연구)

  • Kim, Kiu-Jo;Kim, Wan-Tae;Lee, Tae-Ho;Yoo, Hung-Chul;Huh, Chang-Su
    • Journal of the Korean Solar Energy Society
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    • v.21 no.2
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    • pp.1-8
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    • 2001
  • The most effective methods for utilizing solar energy are to use the sunlight and solar thermal energy such as hybrid panel simultaneously and to use concentrator. From such a view point systems using various kinds of photovoltaic panels are constructed in the world. However, there has not been a hybrid panel with a concentrator. If the sunlight is concentrated on solar cell, cell conversion efficiency increases and the temperature of the solar cell s increases. As the temperature of the solar cells increases, the cell conversion efficiency gradually decreases. For maintaining the cell conversion efficiency constant, it is necessary to keep solar cell at low temperature. In this paper, after designing a concentration rate for concentrating, we propose a model for cooling the cell and for using wasted heat. And, we compare it with conventional panels after calculating the electrical and thermal efficiency, using the energy balance equation.

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A Study on the Solar Radiation Analysis for Components and Classified Wavelength in Korea (국내 태양광자원의 성분 및 파장별 분석에 관한 연구)

  • Jo, Dok-Ki;Yun, Chang-Yeol;Kim, Kwang-Deuk;Kang, Young-Heack
    • Journal of the Korean Solar Energy Society
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    • v.32 no.2
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    • pp.35-41
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    • 2012
  • Knowledge of the solar radiation components and classified wavelength data are essential for modeling many solar photovoltaic systems. This is particularly the case for applications that concentrate the incident energy to attain high photo-dynamic efficiency achievable only at the higher intensities. In order to estimate the performance of concentrating PV systems, it is necessary to know the intensity of the beam radiation, as only this components can be concentrated, and The new PV cell can generate electricity from ultraviolet and infrared light as well as visible light. The Korea Institute of Energy Research(KIER) has began collecting solar radiation components data since January, 1988, and solar radiation classified wavelength data since November, 2008. KIER's solar radiation components and classified wavelength data will be extensively used by concentrating PV system users or designers as well as by research institutes. It is essential to utilize the solar radiation data as application and development of solar energy system increase. Consider able efforts have been made constructing a standard data base system from measure data.

A study on the fixed-concentrating hybrid panel using reflector (반사판을 이용한 고정식 집속형 복합 Panel에 대한 연구)

  • Kim, Kiu-Jo;Kim, Seung-Whan;Yoo, Hung-Chul;Kim, Wan-Tae;Huh, Chang-Su
    • Proceedings of the KIEE Conference
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    • 2001.04a
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    • pp.463-466
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    • 2001
  • The most effective methods of utilizing solar energy are to use the sunlight and solar thermal energy such as hybrid panel simultaneously and to use concentrator. From such a view point, systems using various kinds of photovoltaic panels were constructed in the world. However there have not been a type of panel using concentrator and hybrid simultaneously. If the sunlight are concentrated on the solar cell, cell conversion efficiency increase and the temperature of the solar cells increases. As the temperature of the solar cells increases, so cell conversion efficiency decreases. Therefore, for maintaining cell conversion efficiency at these conditions, it is necessary to keep the cell at low temperature. In this paper, after designing a concentrate rate for concentrating, we proposed model for cooling cell and using waste heat, and we compared with conventional panels after calculating the electrical and thermal efficiency using energy balance equation.

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A Study on the Application of Fixed-concentrated PV Module Hybrid Panel for BIPV (고정식 집속형 PV모듈 복합패널의 BIPV적용성 검토)

  • Seo, Yu-Jin;Huh, Chang-Su
    • Journal of the Korean Solar Energy Society
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    • v.25 no.4
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    • pp.77-83
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    • 2005
  • The verified thermal efficiency, thermal capacity confirmed the effects of the cooling system. Therefore, it is useful for preventing the PV cell temperature rising when solar radiation accumulates in summer. When adopting a hybrid panel for the BIPV system, the affected areas include the vertical outside walls facing the south, southeast, and southwest on the curtain walls excluding windows. The standards on replace aluminum panel which were the popular exterior material were investigated, Designing practice made sure that it could be manufactured in various sizes, and confirmed the most proper method to install a hybrid panel in the BIPV system.

TMC (Tracker Motion Controller) Using Sensors and GPS Implementation and Performance Analysis (센서와 GPS를 이용한 TMC의 구현 및 성능 분석)

  • Ko, Jae-Hong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.2
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    • pp.828-834
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    • 2013
  • In this paper, TMC (Tracker Motion Controller) as one of the many research methods for condensing efficiency improvements can be condensed into efficient solar system configuration to improve the power generation efficiency of the castle with Concentrated solar silicon and photovoltaic systems (CPV)experiments using PV systems. Microprocessor used on the solar system, tracing the development of solar altitude and latitude of each is calculated in real time. Also accept the value from the sensor, motor control and communication with the central control system by calculating the value of the current position of the sun, there is a growing burden on the applicability. Through the way the program is appropriate for solar power systems and sensors hybrid-type algorithm was implemented in the ARM core with built-in TMC, Concentrated CPV system compared to the existing PV systems, through the implementation of the TMC in the country's power generation efficiency compared and analyzed. Sensor method using existing experimental results Concentrated solar power systems to communicate the value of GPS location tracking method hybrid solar horizons in the coordinate system of the sun's azimuth and elevation angles calculated by the program in the calculations of astronomy through experimental resultslook clear day at high solar irradiation were shown to have a large difference. Stopped after a certain period of time, the sun appears in the blind spot of the sensor, the sensor error that can occur from climate change, however, do not have a cloudy and clear day solar radiation sensor does not keep track of the position of the sun, rather than the sensor of excellence could be found. It is expected that research is constantly needed for the system with ongoing research for development of solar cell efficiency increases to reduce the production cost of power generation, high efficiency condensing type according to the change of climate with the optimal development of the ability TMC.

Study on the Characteristics of GaInP/AlGaInP Heterojunction Photovoltaic Cells under Concentrated Illumination (집광 조건에서의 GaInP/AlGaInP 이종접합 구조 태양전지 특성 연구)

  • Kim, Junghwan
    • Applied Chemistry for Engineering
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    • v.30 no.4
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    • pp.504-508
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    • 2019
  • The feasibility of replacing the tope cell of pn GaInP homojunction with our GaInP/AlGaInP heterojunction structure in III-V semiconductor multijunction photovoltaic (MJPV) cells having the highest current conversion efficiency was investigated. The performance of photovoltaic (PV) cells grown on $2^{\circ}$ and $10^{\circ}$ off-oriented GaAs substrates were compared to each other. The PV cells on the $10^{\circ}$ off-cut substrate showed higher short-circuit current density ($J_{sc}$) and conversion efficiency values than that of using the $2^{\circ}$ one. For $2{\times}2mm^2$ area PV cell on $10^{\circ}$ off substrate, the $J_{sc}$ of $9.21mA/cm^2$ and the open-circuit voltage of 1.38 V were measured under 1 sun illumination. For $5{\times}5mm^2$ cell on $10^{\circ}$ off substrate, the conversion efficiency was decreased from 6.03% (1 sun) to 5.28% (20 sun) due to a decrease in fiill factor (FF).

The Characteristic of the Performance of the Bypass Diode with Composition Change of the String in Si-PV Module (결정질 PV 모듈의 string 구성에 따른 바이패스 다이오드 동작 특성)

  • Ji, Yang-Geun;Kong, Ji-Hyun;Kang, Gi-Hwan;Yu, Gwon-Jong;Ahn, Hyung-Gun;Han, Deuk-Young
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.12
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    • pp.2212-2217
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    • 2010
  • Previous studies have been focused on the voltage of Bypass diode and Isc(Short Circuit Current) of the influenced solar cell. The Bypass diode starts working when it gets the reverse applied voltage. Previous studies have only concentrated on Isc of the influenced solar cell and Imp of PV module to explain the bypassing performance. PV module is usually working together with inverter having MPPT(Maximum Power Point Tracking) function for best performance. bypassing point is regulated by MPPT function of inverter. In this paper, simulation results of Bypass diode in PV module have been analyzed to represent the relationship of the bypassing point with the composition of PV module. From the results, the more cells are connected with each string, the earlier bypassing performance happens under the fixed number of strings. As diode groups increase or irradiation decreases, the bypassing performance starts fast.

Preparation of CuS Counter Electrodes Using Electroplating for Quantum Dot-sensitized Solar Cells (전기 도금 공정을 활용한 양자점 감응 태양전지 CuS 상대 전극 제작)

  • SEUNG BEOM HA; IN-HEE CHOI;JAE-YUP KIM
    • Transactions of the Korean hydrogen and new energy society
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    • v.34 no.6
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    • pp.785-791
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    • 2023
  • Copper sulfide (CuxS) has been extensively utilized as a counter electrode (CE) material for quantum dot solar cells (QDSCs) due to its exceptional catalytic activity for polysulfide electrolytes. The typical fabrication method of Cu2S CEs based on brass substrate is dangerous, involving the use of a highly concentrated hydrochloric acid solution in a relatively high temperature. In contrast, electroplating presents a safer alternative by employing a less acidic solution at a room temperature. In addition, the electroplating method increases the probability of obtaining CEs of consistent quality compared to the brass method. In this study, the optimized electroplating cycle for CuS CEs in QDSCs has been studied for the highly efficient photovoltaic performances. The QDSCs, featuring electroplated CuS CEs, achieved an impressive efficiency of 7.18%, surpassing the conventional method employing brass CEs, which yielded an efficiency of 6.62%.

Plasmonic Enhanced Light Absorption by Silver Nanoparticles Formed on Both Front and Rear Surface of Polycrystalline Silicon Thin Film Solar Cells

  • Park, Jongsung;Park, Nochang;Varlamov, Sergey
    • Proceedings of the Korean Vacuum Society Conference
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    • 2014.02a
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    • pp.493-493
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    • 2014
  • The manufacturing cost of thin-film photovoltics can potentially be lowered by minimizing the amount of a semiconductor material used to fabricate devices. Thin-film solar cells are typically only a few micrometers thick, whereas crystalline silicon (c-Si) wafer solar cells are $180{\sim}300\mu}m$ thick. As such, thin-film layers do not fully absorb incident light and their energy conversion efficiency is lower compared with that of c-Si wafer solar cells. Therefore, effective light trapping is required to realize commercially viable thin-film cells, particularly for indirect-band-gap semiconductors such as c-Si. An emerging method for light trapping in thin film solar cells is the use of metallic nanostructures that support surface plasmons. Plasmon-enhanced light absorption is shown to increase the cell photocurrent in many types of solar cells, specifically, in c-Si thin-film solar cells and in poly-Si thin film solar cell. By proper engineering of these structures, light can be concentrated and coupled into a thin semiconductor layer to increase light absorption. In many cases, silver (Ag) nanoparticles (NP) are formed either on the front surface or on the rear surface on the cells. In case of poly-Si thin film solar cells, Ag NPs are formed on the rear surface of the cells due to longer wavelengths are not perfectly absorbed in the active layer on the first path. In our cells, shorter wavelengths typically 300~500 nm are also not effectively absorbed. For this reason, a new concept of plasmonic nanostructure which is NPs formed both the front - and the rear - surface is worth testing. In this simulation Al NPs were located onto glass because Al has much lower parasitic absorption than other metal NPs. In case of Ag NP, it features parasitic absorption in the optical frequency range. On the other hand, Al NP, which is non-resonant metal NP, is characterized with a higher density of conduction electrons, resulting in highly negative dielectric permittivity. It makes them more suitable for the forward scattering configuration. In addition to this, Ag NP is located on the rear surface of the cell. Ag NPs showed good performance enhancement when they are located on the rear surface of our cells. In this simulation, Al NPs are located on glass and Ag NP is located on the rear Si surface. The structure for the simulation is shown in figure 1. Figure 2 shows FDTD-simulated absorption graphs of the proposed and reference structures. In the simulation, the front of the cell has Al NPs with 70 nm radius and 12.5% coverage; and the rear of the cell has Ag NPs with 157 nm in radius and 41.5% coverage. Such a structure shows better light absorption in 300~550 nm than that of the reference cell without any NPs and the structure with Ag NP on rear only. Therefore, it can be expected that enhanced light absorption of the structure with Al NP on front at 300~550 nm can contribute to the photocurrent enhancement.

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Linear Fresnel Lens Optimization for Middle Concentrated Photovoltaic (중집광형 태양광 집광장치 용 선형 프레넬 렌즈의 최적화설계연구)

  • Song, Je Heon;Yu, Jin Hee;Lee, Jun Ho;Jang, Won Keun;Lee, Dong Gil
    • Korean Journal of Optics and Photonics
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    • v.24 no.5
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    • pp.213-216
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    • 2013
  • This paper presents a combination of linear Fresnel lenses optimized for ${\times}25$ solar concentration. The combined lens consists of $5{\times}5$ linear Fresnel lenses. Each Fresnel lens is of $10{\times}10$ mm and optimized to tilt the incoming light onto a solar cell of the same size. All of the optimized Fresnel segments have the same pattern height of 35 ${\mu}m$, draft angle of $4^{\circ}$, and edge groove round of 1 ${\mu}m$ but with different facet angles varying from $14.1^{\circ}$ to $31.2^{\circ}$. The solar concentrating efficiency of the combination is shown to be over 80% and more robust than a conventional single ${\times}25$ circular Fresnel lens in terms of pointing misalignment and manufacturing errors. A sensitivity analysis finds that the edge groove round should be kept as small as machining allows since the concentrating efficiency drops ~5% per 1 ${\mu}m$ increase of the edge groove.