2012 38th IEEE Photovoltaic Specialists Conference最新文献_第7页

Effect of band bending and band offset in the transport of minority carriers across the ordered/disordered interface of a-Si/c-Si heterojunction solar cell a-Si/c-Si异质结太阳能电池中少数载流子在有序/无序界面上输运的能带弯曲和能带偏移影响

2012 38th IEEE Photovoltaic Specialists Conference Pub Date : 2012-06-03 DOI: 10.1109/PVSC.2012.6317605

K. Ghosh, C. Tracy, S. Goodnick, S. Bowden

{"title":"Effect of band bending and band offset in the transport of minority carriers across the ordered/disordered interface of a-Si/c-Si heterojunction solar cell","authors":"K. Ghosh, C. Tracy, S. Goodnick, S. Bowden","doi":"10.1109/PVSC.2012.6317605","DOIUrl":"https://doi.org/10.1109/PVSC.2012.6317605","url":null,"abstract":"The transport of photogenerated minority carriers (photocarriers) across the heterointerface of amorphous silicon (a-Si) and crystalline silicon (c-Si) in a-Si/c-Si heterostructure solar cell is shown in this work to critically depend on the non-Maxwellian energy distribution function of those carriers impinging on the heterointerface. A theoretical model is presented that integrates the effect of the high electric field inversion region upon energy distribution function of the impinging carriers with the transmission probability of those carriers across the heterointerface. The transport of the photocarriers across the high electric field inversion region is simulated by the full solution of the Boltzmann transport equation by Monte Carlo technique while the transmission probability of carriers across the heterointerface is calculated through the percolation path technique. The results are discussed under two different condition of band bending; strongly inverted and weakly inverted c-Si surface. The results comparing different conditions of band bending show that the energy distribution of the carriers impinging on the heterointerface is non-Maxwellian and the integrated photocarrier collection increases with the strength of the inversion field since the carrier population is weighted towards higher energy where the transmission probability through the barrier is higher. Thus we demonstrate that hot carriers play an important role in heterostructure cell operation.","PeriodicalId":6318,"journal":{"name":"2012 38th IEEE Photovoltaic Specialists Conference","volume":"03 1","pages":"000221-000226"},"PeriodicalIF":0.0,"publicationDate":"2012-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86347898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Investigation of electrical characteristics of P3HT:PCBM organic solar cells P3HT:PCBM有机太阳能电池电学特性研究

2012 38th IEEE Photovoltaic Specialists Conference Pub Date : 2012-06-03 DOI: 10.1109/PVSC.2012.6318167

Yang Shen, Mool C. Gupta

引用次数: 10

Transparent conductive oxide / encapsulant interface characterization following Damp Heat exposure 湿热暴露后透明导电氧化物/密封剂界面特性

2012 38th IEEE Photovoltaic Specialists Conference Pub Date : 2012-06-03 DOI: 10.1109/PVSC.2012.6317659

K. Stika, S. Pélisset, S. Schreiber, F. de Borman Chautems, P. Dafniotis, Laure‐Emmanuelle Perret‐Aebi, C. Ballif

{"title":"Transparent conductive oxide / encapsulant interface characterization following Damp Heat exposure","authors":"K. Stika, S. Pélisset, S. Schreiber, F. de Borman Chautems, P. Dafniotis, Laure‐Emmanuelle Perret‐Aebi, C. Ballif","doi":"10.1109/PVSC.2012.6317659","DOIUrl":"https://doi.org/10.1109/PVSC.2012.6317659","url":null,"abstract":"The role of surface analysis, specifically XPS (X-ray Photoelectron Spectroscopy) and SIMS (Secondary Ion Mass Spectrometry) has been explored to broaden our understanding of TCO / encapsulant interactions focusing on TCO resistivity evolution. Peel laminates of PVB, Ionomer and EVA encapsulants with LPCVD boron doped ZnO were exposed to Damp Heat and removed at different points in the aging cycle for analysis. Distinct response patterns were observed for the different encapsulant families and selected ionomers were found to be most effective at protecting and maintaining the conductivity of the TCO. Trends in interfacial ion enrichment as a function of damp heat exposure were determined by a combination of XPS and SIMS to provide the necessary quantitation, sensitivity and surface specificity. In this study, the transition from a cohesive peel within the encapsulant toward an adhesive peel between the TCO and encapsulant layers provided an important point of comparison. Depth profiling to determine the distribution of mobile species throughout the thickness of the TCO added yet another dimension to our understanding of TCO / encapsulant interactions.","PeriodicalId":6318,"journal":{"name":"2012 38th IEEE Photovoltaic Specialists Conference","volume":"100 1","pages":"000470-000473"},"PeriodicalIF":0.0,"publicationDate":"2012-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88987945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel dual-layered passivation approach for 18.8% efficiency laser doped selective emitter cells 18.8%效率激光掺杂选择性发射极电池的新型双层钝化方法

2012 38th IEEE Photovoltaic Specialists Conference Pub Date : 2012-06-03 DOI: 10.1109/PVSC.2012.6317772

Tseng-Jung Chang, Te-Yu Wei, S. H. Chen, Li-Wei Cheng

引用次数: 0

Large-grain polysilicon seed layers on glass for epitaxial silicon solar cells 外延硅太阳能电池用玻璃上的大颗粒多晶硅种子层

2012 38th IEEE Photovoltaic Specialists Conference Pub Date : 2012-06-03 DOI: 10.1109/PVSC.2012.6317639

S. Shumate, H. Mohammed, D. Hutchings, H. Naseem

引用次数: 3

Dry-epitaxial lift-off, integration, interconnect and encapsulation of foldable/rollable high efficiency solar cell modules 可折叠/可卷曲高效太阳能电池组件的干外延提升、集成、互连和封装

2012 38th IEEE Photovoltaic Specialists Conference Pub Date : 2012-06-03 DOI: 10.1109/PVSC.2012.6318187

J. Farah

{"title":"Dry-epitaxial lift-off, integration, interconnect and encapsulation of foldable/rollable high efficiency solar cell modules","authors":"J. Farah","doi":"10.1109/PVSC.2012.6318187","DOIUrl":"https://doi.org/10.1109/PVSC.2012.6318187","url":null,"abstract":"OptiCOMP Networks is developing a new method for manufacturing thin, lightweight, flexible, portable high efficiency III-V PV modules that can be folded and rolled for space and terrestrial applications. Multi-junction inverted (IMM3J) and non-inverted cells are lifted off the Ge or GaAs growth wafer and transferred to inexpensive flexible polyimide permanent carrier substrate. The lift-off happens in fraction of a second. OptiCOMP uses proprietary materials and bonding techniques. No expensive ion implantation or slow chemical etching of a sacrificial layer is needed. Several cells are integrated on a common blanket polymeric sheet and interconnected by soldering copper ribbons. Both sides of the epi-layer can be contacted from the top side of the wafer. This eliminates the need for copper cladded polymeric substrates and reduces weight. The cells were fully encapsulated using transparent spray-on polyimide layer which replaces the cover glass. The thickness and CTE of the blanket polyimide layer were chosen to stress-balance the structure so that it remains flat in spite of 300°C temperature variations in orbit. The entire solar cell structure is less than 250 μm thick and achieves a specific power ratio of 340 W/kg. The base wafer is reused to grow another epi-layer and the cycle repeated. The cost of substrate materials is about 40% of the cost of the finished cell. OptiCOMP's process will result in savings in raw materials up to 30% of the cost of the cell and will enable terrestrial applications.","PeriodicalId":6318,"journal":{"name":"2012 38th IEEE Photovoltaic Specialists Conference","volume":"45 1","pages":"002868-002873"},"PeriodicalIF":0.0,"publicationDate":"2012-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83083231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Insolation dependent solar module performance evaluation from PV monitoring data 基于光伏监测数据的太阳能组件性能评估

2012 38th IEEE Photovoltaic Specialists Conference Pub Date : 2012-06-03 DOI: 10.1109/PVSC.2012.6317834

V. Herbort, R. von Schwerin, B. Compton, L. Brecht, H. te Heesen

引用次数: 6

18.8 % efficient laser-doped semiconductor fingers screen-printed silicon solar cell with light-induced plating 18.8%高效激光掺杂半导体手指屏印刷硅太阳能电池

2012 38th IEEE Photovoltaic Specialists Conference Pub Date : 2012-06-03 DOI: 10.1109/PVSC.2012.6317805

Kee Soon Wang, D. Lin, Xinrui An, L. Mai, E. Mitchell, S. Wenham

引用次数: 3

A control strategy to reduce the effect of intermittent solar radiation and wind velocity in the hybrid photovoltaic/wind SCIG system without losing MPPT 一种在不损失MPPT的情况下降低光伏/风力混合SCIG系统中间歇性太阳辐射和风速影响的控制策略

2012 38th IEEE Photovoltaic Specialists Conference Pub Date : 2012-06-03 DOI: 10.1109/PVSC.2012.6317860

R. Wandhare, V. Agarwal

{"title":"A control strategy to reduce the effect of intermittent solar radiation and wind velocity in the hybrid photovoltaic/wind SCIG system without losing MPPT","authors":"R. Wandhare, V. Agarwal","doi":"10.1109/PVSC.2012.6317860","DOIUrl":"https://doi.org/10.1109/PVSC.2012.6317860","url":null,"abstract":"The intermittent but complimentary nature of solar photovoltaic and wind mill generated power explored a new area of research for the hybrid PV/wind systems. This paper proposes a novel strategy for the control of power conditioning units to minimize the disturbances on the output power from the hybrid system, integrated with PV and wind turbine, in spite of highly intermittent nature of these sources. The proposed scheme balances the wide variation of power yield from wind and/or PV system and provides sufficient margin to the other sources (e.g. hydro, steam turbine, etc.) connected to the system to take over, so that to maintain power balance throughout the operation. The presented strategy makes use of high energy density ultracapacitor to absorb the effect of intermittent solar radiation and widely varying wind velocity. The MPPT associated with these sources remains unaffected and does not hamper overall generation from the system. The DC link of the conventional back to back topology of the wind farm is integrated with the PV panels with their MPPT trackers. The control strategy uses an inner fast current control loop and an outer slow voltage correcting loop for both the grid side VSI and the ultracapacitor converter. Simulation results are presented in the support of effectiveness of the proposed technique. A prototype is developed with the available 1.5kW PV installation, 1.2kW emulated wind turbine and ultracapacitor bank to validate some aspect of the proposed strategy.","PeriodicalId":6318,"journal":{"name":"2012 38th IEEE Photovoltaic Specialists Conference","volume":"28 1","pages":"001399-001404"},"PeriodicalIF":0.0,"publicationDate":"2012-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79272772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Defect band luminescence intensity reversal as related to application of anti-reflection coating on mc-Si PV Cells 在mc-Si光伏电池上应用增透涂层的缺陷带发光强度反转

2012 38th IEEE Photovoltaic Specialists Conference Pub Date : 2012-06-03 DOI: 10.1109/PVSC.2012.6317606

H. Guthrey, S. Johnston, Fei Yan, B. Gorman, M. Al‐Jassim

{"title":"Defect band luminescence intensity reversal as related to application of anti-reflection coating on mc-Si PV Cells","authors":"H. Guthrey, S. Johnston, Fei Yan, B. Gorman, M. Al‐Jassim","doi":"10.1109/PVSC.2012.6317606","DOIUrl":"https://doi.org/10.1109/PVSC.2012.6317606","url":null,"abstract":"Photoluminescence (PL) imaging is widely used to identify defective regions within mc-Si PV cells. Recent PL imaging investigations of defect band luminescence (DBL) in mc-Si have revealed a perplexing phenomenon. Namely, the reversal of the DBL intensity in various regions of mc-Si PV material upon the application of a SiNx:H anti-reflective coating (ARC). Regions with low DBL intensity before ARC application often exhibit high DBL intensity afterwards, and the converse is also true. PL imaging alone cannot explain this effect. We have used high resolution cathodoluminescence (CL) spectroscopy and electron beam induced current (EBIC) techniques to elucidate the origin of the DBL intensity reversal. Multiple sub-bandgap energy levels were identified that change in peak position and intensity upon the application of the ARC. Using this data, in addition to EBIC contrast information, we provide an explanation for the DBL intensity reversal based on the interaction of the detected energy levels with the SiNx:H ARC application. Multiple investigations have suggested that this is a global problem for mc-Si PV cells. Our results have the potential to provide mc-Si PV producers a pathway to increased efficiencies through defect mitigation strategies.","PeriodicalId":6318,"journal":{"name":"2012 38th IEEE Photovoltaic Specialists Conference","volume":"95 1","pages":"000227-000230"},"PeriodicalIF":0.0,"publicationDate":"2012-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79460307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1