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提高薄膜太阳能电池的效率 总被引:2,自引:0,他引:2
降低硅太阳能电池成本的方法之一是尽量减少高质量硅材料的使用量,如薄膜太阳能电池。不过这种太阳能电池的效率只达到了约11-12%。研究人员们正在寻求提升其效率的方法。最近取得突破的技术有 相似文献
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通过应用Scharfetter-Gummel解法数值求解Poisson方程,对热平衡态p(ZnTe)/i(CdTe)/n(CdS)薄膜太阳能电池进行计算机数值模拟。结果表明,p(ZnTe)/i(CdTe)/n(CdS)的能带结构有利于光生载流子传输与收集,CdTe中高内建场提高了光生载流子通过有源区的输运能力,对CdTe进行适量P型掺杂还能提高其电池的短波收集效率。 相似文献
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林秀瑶 《电子技术与软件工程》2016,(3):254
薄膜太阳能电池是有效利用新能源的新型光伏器件。本文综述了硅基类、化合物类以及染料敏化三种薄膜太阳能电池研究现状,并展望了未来的发展前景。 相似文献
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人类进入21世纪,能源问题更为突出,常规能源的匮乏不足,面临在有限资源和环保严格要求的双重制约下实现经济和社会可持续发展已成为全球热点问题。传统的石油、煤等化石能源的开发利用,在一定程度上带来了环境污染、温室效应 相似文献
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薄膜太阳能电池前景 总被引:2,自引:0,他引:2
本刊编辑部 《电子工业专用设备》2009,38(1):1-7
光伏产业已成为我国可再生能源产业中继风力发电之后发展最快的产业,光伏发电技术也是全球研究的热点之一。在薄膜太阳能光伏电池的优势和现有薄膜PV基础上,分析了薄膜光伏技术进入商业化的问题所在,探索了薄膜太阳能电池的应用及产能潜势,展望了α—Si与CdTe薄膜光伏产业前景。 相似文献
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O. Kunz Z. Ouyang S. Varlamov A. G. Aberle 《Progress in Photovoltaics: Research and Applications》2009,17(8):567-573
The first energy conversion efficiencies of over 5% are reported for evaporated solid‐phase crystallised (SPC) polycrystalline silicon thin‐film solar cells. All cells have a size of 2 cm2 and are formed on planar glass superstrates. Back surface reflectance is provided by a simple coating with commercial white paint. The best cells have short‐circuit current densities of about 19 mA/cm2 and external quantum efficiencies peaking at above 80%. The diffusion length in the base of the solar cells is larger than the base thickness, providing significant room for further efficiency improvements via an increased thickness of the base layer. Additional improvements are expected via the use of textured glass sheets, boosting the light trapping capabilities of the cells. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
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Prakash Koirala Jian Li Heayoung P. Yoon Puruswottam Aryal Sylvain Marsillac Angus A. Rockett Nikolas J. Podraza Robert W. Collins 《Progress in Photovoltaics: Research and Applications》2016,24(8):1055-1067
Polycrystalline CdS/CdTe thin‐film solar cells in the superstrate configuration have been studied by spectroscopic ellipsometry (SE) using glass side illumination. In this measurement method, the first reflection from the ambient/glass interface is rejected, whereas the second reflection from the glass/film‐stack interface is collected; higher order reflections are also rejected. The SE analysis incorporates parameterized dielectric functions ε for solar cell component materials obtained by in situ and variable‐angle SE. In the SE analysis of the complete cells, a step‐wise procedure ranks the fitting parameters, including thicknesses and those defining the spectra in ε, according to their ability to reduce the root‐mean‐square deviation between the simulated and measured SE spectra. The best fit thicknesses from this analysis are found to be consistent with electron microscopy. Based on the SE results, the solar cell quantum efficiency (QE) can be simulated without any free parameters, and comparisons with measured QE enable optical model refinements as well as identification of optical and electronic losses. These capabilities have wide applications in photovoltaic module mapping and in‐line monitoring. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
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Nahdia Majeed Maria Saladina Michal Krompiec Steve Greedy Carsten Deibel Roderick C. I. MacKenzie 《Advanced functional materials》2020,30(7)
There is currently a worldwide effort to develop materials for solar energy harvesting which are efficient and cost effective, and do not emit significant levels of CO2 during manufacture. When a researcher fabricates a novel device from a novel material system, it often takes many weeks of experimental effort and data analysis to understand why any given device/material combination produces an efficient or poorly optimized cell. It therefore takes the community tens of years to transform a promising material system to a fully optimized cell ready for production (perovskites are a contemporary example). Herein, developed is a new and rapid approach to understanding device/material performance, which uses a combination of machine learning, device modeling, and experiment. Providing a set of electrical device parameters (charge carrier mobilities, recombination rates, trap densities, etc.) in a matter of seconds thus offers a fast way to directly link fabrication conditions to device/material performance, pointing a way to further and more rapid optimization of light harvesting devices. The method is demonstrated by using it to understand annealing temperature and surfactant choice and in terms of charge carrier dynamics in organic solar cells made from the P3HT:PCBM, PBTZT‐stat‐BDTT‐8:PCBM, and PTB7:PCBM material systems. 相似文献
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Erik Wallin Ulf Malm Tobias Jarmar Olle Lundberg Marika Edoff Lars Stolt 《Progress in Photovoltaics: Research and Applications》2012,20(7):851-854
We report a new certified world‐record efficiency for thin‐film Cu(In,Ga)Se2‐based photovoltaic sub‐modules of 17.4% (aperture area). The record efficiency of the 16 cm2, monolithically integrated, sub‐module has been independently confirmed by Fraunhofer ISE. The record device is the result of extensive co‐optimization of all processing steps. During the optimization process, strong focus has been put on the scalability of processes to cost‐effective mass production, as reflected, for example, in Cu(In,Ga)Se2 deposition time and substrate temperature. Device manufacturing as well as results of electrical and material characterization is discussed. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
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Enrique Barrign Pilar Espinet‐Gonzlez Yedileth Contreras Ignacio Rey‐Stolle 《Progress in Photovoltaics: Research and Applications》2015,23(11):1597-1607
The electrical and optical coupling between subcells in a multijunction solar cell affects its external quantum efficiency (EQE) measurement. In this study, we show how a low breakdown voltage of a component subcell impacts the EQE determination of a multijunction solar cell and demands the use of a finely adjusted external voltage bias. The optimum voltage bias for the EQE measurement of a Ge subcell in two different GaInP/GaInAs/Ge triple‐junction solar cells is determined both by sweeping the external voltage bias and by tracing the I–V curve under the same light bias conditions applied during the EQE measurement. It is shown that the I–V curve gives rapid and valuable information about the adequate light and voltage bias needed, and also helps to detect problems associated with non‐ideal I–V curves that might affect the EQE measurement. The results also show that, if a non‐optimum voltage bias is applied, a measurement artifact can result. Only when the problems associated with a non‐ideal I–V curve and/or a low breakdown voltage have been discarded, the measurement artifacts, if any, can be attributed to other effects such as luminescent coupling between subcells. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
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The present status of (CdZn)S/Cu2S thin film solar cells is reviewed. A new source design has been used to improve the (CdZn)S films. Light reflection loss
has been reduced to ∼ 5% by texturing the (CdZn)S surface prior to Cu2S formation. Using 90% transparent grids, current densities over 16 ma/cm2 and open circuit voltages over 0.7 volts have been obtained, with a best power conversion efficiency of 6.29%. 相似文献
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Lin Zhu Kan‐Hua Lee Masafumi Yamaguchi Hidefumi Akiyama Yoshihiko Kanemitsu Kenji Araki Nobuaki Kojima 《Progress in Photovoltaics: Research and Applications》2019,27(11):971-977
Quantum dot (QD) solar cells have drawn much attention in research because of their tunable band gap and potential to realize many novel concepts, such as intermediate transitions. However, high nonradiative recombination rates in the QD layer stand in the way of realizing high‐efficiency QD solar cells. In this paper, the efficiency potential of QD solar cells is discussed based on external radiative efficiency (ERE), open‐circuit voltage loss, fill factor loss, and nonradiative recombination loss via current‐voltage characteristics in a detailed balance model. The intrinsic loss of QD solar cells substantially increases with increasing binding energy and volume density of the QDs. The ERE of QD solar cells decreases with increasing binding energy and volume density of the QDs due to nonradiative recombination. 相似文献