2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2最新文献_第3页

System performance considerations for low concentration linear-focus silicon-based photovoltaic modules 低浓度线性聚焦硅基光伏组件的系统性能考虑

2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2 Pub Date : 2013-01-01 DOI: 10.1109/pvsc-vol2.2012.6656791

R. Varieras, Jusong Wang, D. King

引用次数: 12

Dislocation density reduction during impurity gettering in multicrystalline silicon 多晶硅杂质掺杂过程中位错密度的降低

2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2 Pub Date : 2013-01-01 DOI: 10.1109/pvsc-vol2.2013.6656733

H. J. Choi, M. Bertoni, J. Hofstetter, D. Fenning, D. M. Powell, S. Castellanos, T. Buonassisi

{"title":"Dislocation density reduction during impurity gettering in multicrystalline silicon","authors":"H. J. Choi, M. Bertoni, J. Hofstetter, D. Fenning, D. M. Powell, S. Castellanos, T. Buonassisi","doi":"10.1109/pvsc-vol2.2013.6656733","DOIUrl":"https://doi.org/10.1109/pvsc-vol2.2013.6656733","url":null,"abstract":"Isothermal annealing above 1250 °C has been reported to reduce the dislocation density in multicrystalline silicon (mc-Si), presumably by pairwise dislocation annihilation. However, this high-temperature process may also cause significant impurity contamination, canceling out the positive effect of dislocation density reduction on cell performance. Here, efforts are made to annihilate dislocations in mc-Si in temperatures as low as 820 °C, with the assistance of an additional driving force to stimulate dislocation motion. A reduction of more than 60% in dislocation density is observed for mc-Si containing intermediate concentrations of certain metallic species after P gettering at 820 °C. While the precise mechanism remains in discussion, available evidence suggests that the net unidirectional flux of impurities in the presence of a gettering layer may cause dislocation motion, leading to dislocation density reduction. Analysis of minority carrier lifetime as a function of dislocation density suggests that lifetime improvements after P diffusion in these samples can be attributed to the combined effects of dislocation density reduction and impurity concentration reduction. These findings suggest there may be mechanisms to reduce dislocation densities at standard solar cell processing temperatures.","PeriodicalId":6420,"journal":{"name":"2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2","volume":"30 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82369991","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

Demonstration of hybrid prototype sealant for encapsulating organic photovoltaics 用于封装有机光伏的混合原型密封胶的演示

2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2 Pub Date : 2013-01-01 DOI: 10.1109/pvsc-vol2.2013.6656714

Minjae Kim, M. C. Clingerman, Alex W. Kawczak, P. R. Berger

{"title":"Demonstration of hybrid prototype sealant for encapsulating organic photovoltaics","authors":"Minjae Kim, M. C. Clingerman, Alex W. Kawczak, P. R. Berger","doi":"10.1109/pvsc-vol2.2013.6656714","DOIUrl":"https://doi.org/10.1109/pvsc-vol2.2013.6656714","url":null,"abstract":"Technical and economic viability of photovoltaic (PV) technology are governed by three parameters: efficiency, cost and lifetime. Since its inception, the main driver in organic photovolatics (OPV) research has been towards achieving high efficiency. Continued effort was fructified as achievement of 10 % efficiency, which was considered as a break-even point for commercial viability. Shifting of focus to lifetime is a next logical step. Increase lifetime of OPV by reliable encapsulation enhances technical feasibility and economic viability. So far, focus has been given on encapsulation barrier films, and little effort has been made on sealants; of this limited effort, the testing of existing commercial sealants is the general trend. Requirements of Sealants for OPV encapsulation include compatibility with low-cost and low-temperature OPV processing, lightness, flexibility, transparency, as well as thermal and UV stability. Hybrid sealants take advantages of good permeability of inorganic sealants and flexibility of organic sealants. In this contribution, we report on the demonstration of new flexible hybrid prototype sealants by calcium corrosion test. Sealants are screen-printable, flexible and can be cured at 130 °C in 15 minutes. Sealing capability of our hybrid sealants was compared with commercial silicone based hybrid sealant, i.e. polydimethylsiloxane (PDMS).","PeriodicalId":6420,"journal":{"name":"2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2","volume":"22 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79099950","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

Effect of Sb on GaNAs intermediate band solar cells Sb对砷化镓中间带太阳能电池的影响

2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2 Pub Date : 2013-01-01 DOI: 10.1109/pvsc-vol2.2012.6656723

N. Ahsan, N. Miyashita, M. M. Islam, K. Yu, W. Walukiewicz, Y. Okada

引用次数: 0

InGaAs/GaAsSb type-II quantum dots for intermediate band solar cell 中间波段太阳能电池用InGaAs/GaAsSb型量子点

2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2 Pub Date : 2013-01-01 DOI: 10.1109/pvsc-vol2.2013.6656699

Y. Shoji, K. Akimoto, Y. Okada

引用次数: 5

Ultralight-trapping filters with volume reflection holograms 带有体反射全息图的超光捕获滤光片

2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2 Pub Date : 2013-01-01 DOI: 10.1109/pvsc-vol2.2013.6656775

Deming Zhang, J. Russo, M. Gordon, S. Vorndran, R. Kostuk

引用次数: 0

Impacts of post-treatments on cell performance of CIGS solar cells with Zn-compound buffer layers 后处理对含锌化合物缓冲层CIGS太阳能电池性能的影响

2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2 Pub Date : 2013-01-01 DOI: 10.1109/pvsc-vol2.2013.6656766

T. Nakada, Taizou Kobayashi, T. Kumazawa, H. Yamaguchi

引用次数: 2

Novel hybrid amorphous/organic tandem junction solar cell 新型杂化非晶/有机串联结太阳能电池

2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2 Pub Date : 2013-01-01 DOI: 10.1109/pvsc-vol2.2013.6656737

S. Pattnaik, T. Xiao, R. Shinar, J. Shinar, V. Dalal

{"title":"Novel hybrid amorphous/organic tandem junction solar cell","authors":"S. Pattnaik, T. Xiao, R. Shinar, J. Shinar, V. Dalal","doi":"10.1109/pvsc-vol2.2013.6656737","DOIUrl":"https://doi.org/10.1109/pvsc-vol2.2013.6656737","url":null,"abstract":"We report on a novel hybrid amorphous Si-organic series-connected tandem junction solar cell. The solar cell is fabricated on indium tin oxide (ITO)-coated glass and uses an a-(Si,C):H as the first cell and a P3HT/PCBM organic cell as the second cell. An intermediate ITO layer is used as an ohmic layer which provides an excellent contact to both the first and the second cells. By adjusting the bandgap and thickness of the first a-(Si,C):H cell, we achieve an almost complete matching of currents produced by the first and the second cells. The first cell produces ∼0.95–1.0-V open-circuit voltage, and the second cell produces ∼0.6-V open-circuit voltage. The combined cell produces 1.5-V open-circuit voltage and had a fill factor of 77%, showing the effectiveness of the intermediate ITO layer to act as an excellent connecting layer between the two cells.When such an ITO layer is not used, the fill factor is very poor. The solar conversion efficiency of the organic cell was 4.3%, whereas the efficiency of the tandem cell was 5.7%. We also measured the stability of the organic cell with and without an inorganic cell acting as a filter in front. It is shown that the degradation of the organic cell is much higher when it is subjected to a full solar spectrum, as compared with when it is subjected to light passing through an inorganic cell first, which filters out ultraviolet (UV) and blue photons. Thus,we showthat this new cell combination has the potential to significantly increase the efficiency of organic cells while also decreasing the instability. We also discuss the potential of achieving much higher efficiencies, that is approaching 20%, by using an appropriate combination of amorphous and organic cells. An example is shown next.","PeriodicalId":6420,"journal":{"name":"2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2","volume":"146 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77247858","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

The effects of device geometry and TCO/buffer layers on damp heat accelerated lifetime testing of Cu(In,Ga)Se2 solar cells 器件几何形状和TCO/缓冲层对Cu(In,Ga)Se2太阳能电池湿热加速寿命测试的影响

2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2 Pub Date : 2013-01-01 DOI: 10.1109/pvsc-vol2.2012.6656788

C. Thompson, S. Hegedus, P. Carcia, R. S. Mclean

{"title":"The effects of device geometry and TCO/buffer layers on damp heat accelerated lifetime testing of Cu(In,Ga)Se2 solar cells","authors":"C. Thompson, S. Hegedus, P. Carcia, R. S. Mclean","doi":"10.1109/pvsc-vol2.2012.6656788","DOIUrl":"https://doi.org/10.1109/pvsc-vol2.2012.6656788","url":null,"abstract":"In Cu(In,Ga)Se2 solar cells encapsulated with polyethylene terephthalate (PET) or glass top sheets, the effects of damp heat (D-H) accelerated lifetime testing (ALT) depend on water vapor transmission rate (WVTR) of both transparent conducting oxide (TCO) and the intrinsic zinc oxide (i-ZnO) buffer, as well as device geometry. PET top sheets have a WVTR of ∼10 g/m2·day, and glass has a WVTR of 0. Previously, coupons encapsulated with PET degraded to 50% of initial efficiency after 1000 h D-H ALT. We show that PET encapsulated coupons degrade at the same rate as glass encapsulated coupons after 2000 h D-H ALT to 92% of initial efficiency. The only change from previous work is that, here, i-ZnO covers the entire coupon surface, not the just active area. The WVTR of the i-ZnO/TCO stack is 2 × 10−3 g·H2 O/m2·day. A set of unencapsulated devices went through D-H ALT, one where scribing was used to define the active area of the device and another without scribing; both were protected only by 50-nm i-ZnO. The bare-unscribed device performed as well as the previous glass and PET encapsulated coupons after 1500 h D-H ALT; the bare-scribed device degraded to 78% of initial efficiency, indicating that TCO integrity is a critical ALT parameter.","PeriodicalId":6420,"journal":{"name":"2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2","volume":"31 1","pages":"1-14"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90177916","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: 5

Large area back-contact back-junction solar cells with efficiency exceeding 21% 大面积背接触背结太阳能电池，效率超过21%

2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2 Pub Date : 2013-01-01 DOI: 10.1109/pvsc-vol2.2012.6656700

G. Galbiati, V. Mihailetchi, A. Halm, L. J. Koduvelikulathu, R. Roescu, R. Kopecek, K. Peter, J. Libal

{"title":"Large area back-contact back-junction solar cells with efficiency exceeding 21%","authors":"G. Galbiati, V. Mihailetchi, A. Halm, L. J. Koduvelikulathu, R. Roescu, R. Kopecek, K. Peter, J. Libal","doi":"10.1109/pvsc-vol2.2012.6656700","DOIUrl":"https://doi.org/10.1109/pvsc-vol2.2012.6656700","url":null,"abstract":"In this work high efficiency solar cells are fabricated with the use of low-cost industrially available technologies. The solar cell concept is called ZEBRA: a litho-free process in which standard 156×156 mm2 monocrystalline n-type Cz-Si are processed into high efficiency Interdigitated Back Contact (IBC) solar cells. In our first trial we obtained conversion efficiencies of more than 20% on solar cells with 239 cm2 area. With the help of a three-dimensional simulation of the device, a further improvement to more than 21.5% was demonstrated. We indentify the open-circuit voltage and the series resistance as the main losses to achieve the simulated efficiency. After an extensive optimization, targeting mainly the improvement of the fill factor, the cell results are presented in this work. The optimised solar cells show an improvement in the energy conversion efficiency of up to 21%. Furthermore, the simple metallization and the module interconnection designed for the ZEBRA cells allow for a bifacial application. Indoor and outdoor measurements on single-cell modules show an enhancement in the generated power of up to 12% at one sun front illumination conditions.","PeriodicalId":6420,"journal":{"name":"2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2","volume":"16 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80229382","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