SPIE Optics + Photonics for Sustainable Energy最新文献_第8页

Design of a holographic micro-scale spectrum-splitting photovoltaic system 全息微尺度分光光伏系统的设计

SPIE Optics + Photonics for Sustainable Energy Pub Date : 2015-09-05 DOI: 10.1117/12.2187073

Yuechen Wu, S. Vorndran, Silvana Ayala Pelaez, J. Russo, R. Kostuk

{"title":"Design of a holographic micro-scale spectrum-splitting photovoltaic system","authors":"Yuechen Wu, S. Vorndran, Silvana Ayala Pelaez, J. Russo, R. Kostuk","doi":"10.1117/12.2187073","DOIUrl":"https://doi.org/10.1117/12.2187073","url":null,"abstract":"Micro-scale PV technology combines the high conversion efficiency of concentrated photovoltaics (CPV) with the low costs and the simple form of flat panel PV. Some of the benefits of micro-scale PV include: reduced semiconductor material usage; improved heat rejection capacity; and more versatile PV cell interconnect configurations. Spectrumsplitting is also a beneficial technique to increase the efficiency and reduce the cost of photovoltaic systems. It spatially separates the incident solar spectrum into spectral components and directs them to PV cells with matching bandgaps. This approach avoids the current and lattice matching problems that exist in tandem multi-junction systems. In this paper, we applied the ideas of spectrum-splitting in a micro-scale PV system, and demonstrated a holographic micro-scale spectrum-splitting photovoltaic system. This system consists of a volume transmission hologram in combination with a micro-lens array. An analysis methodology was developed to design the system and determine the performance of the resulting system. The spatial characteristics of the dispersed spectrum, the overall system conversion efficiency, and the improvement over best bandgap will be discussed.","PeriodicalId":142821,"journal":{"name":"SPIE Optics + Photonics for Sustainable Energy","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114362241","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

Testing and optical modeling of novel concentrating solar receiver geometries to increase light trapping and effective solar absorptance 新型聚光太阳能接收器几何形状的测试和光学建模，以增加光捕获和有效的太阳能吸收

SPIE Optics + Photonics for Sustainable Energy Pub Date : 2015-09-05 DOI: 10.1117/12.2186647

J. Yellowhair, C. Ho, Jesus D. Ortega, J. Christian, C. Andraka

{"title":"Testing and optical modeling of novel concentrating solar receiver geometries to increase light trapping and effective solar absorptance","authors":"J. Yellowhair, C. Ho, Jesus D. Ortega, J. Christian, C. Andraka","doi":"10.1117/12.2186647","DOIUrl":"https://doi.org/10.1117/12.2186647","url":null,"abstract":"Concentrating solar power receivers are comprised of panels of tubes arranged in a cylindrical or cubical shape on top of a tower. The tubes contain heat-transfer fluid that absorbs energy from the concentrated sunlight incident on the tubes. To increase the solar absorptance, black paint or a solar selective coating is applied to the surface of the tubes. However, these coatings degrade over time and must be reapplied, which reduces the system performance and increases costs. This paper presents an evaluation of novel receiver shapes and geometries that create a light-trapping effect, thereby increasing the effective solar absorptance and efficiency of the solar receiver. Several prototype shapes were fabricated from Inconel 718 and tested in Sandia’s solar furnace at an irradiance of ~30 W/cm2. Photographic methods were used to capture the irradiance distribution on the receiver surfaces. The irradiance profiles were compared to results from raytracing models. The effective solar absorptance was also evaluated using the ray-tracing models. Results showed that relative to a flat plate, the new geometries could increase the effective solar absorptance from 86% to 92% for an intrinsic material absorptance of 86%, and from 60% to 73% for an intrinsic material absorptance of 60%.","PeriodicalId":142821,"journal":{"name":"SPIE Optics + Photonics for Sustainable Energy","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127637086","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: 11

Investigating photoluminescence quantum yield of silicon nanocrystals formed in SiOx with different initial Si excess 研究不同初始硅过量在SiOx中形成的硅纳米晶体的光致发光量子产率

SPIE Optics + Photonics for Sustainable Energy Pub Date : 2015-09-04 DOI: 10.1117/12.2191105

Nguyen Xuan Chung, Rens Limpens, T. Gregorkiewicz

引用次数: 8

Analysis of metallic nanoantennas for solar energy conversion 用于太阳能转换的金属纳米天线分析

SPIE Optics + Photonics for Sustainable Energy Pub Date : 2015-09-04 DOI: 10.1117/12.2188597

B. Mora Ventura, R. Díaz de León, G. Garcia-Torales, J. Flores, J. Alda, F. J. González

引用次数: 2

On the road toward a hot carrier solar cell 在通往热载体太阳能电池的道路上

SPIE Optics + Photonics for Sustainable Energy Pub Date : 2015-09-04 DOI: 10.1117/12.2190910

P. Taylor, J. Fields, R. Collins

引用次数: 0

Performance comparison of front-side silver pastes using polyalkylene carbonates for cleaner burning binder system 聚碳酸亚烯清洁燃烧粘结剂系统正面银浆性能比较

SPIE Optics + Photonics for Sustainable Energy Pub Date : 2015-09-04 DOI: 10.1117/12.2189561

R. Stephenson, P. Ferraro

引用次数: 0

Organic photovoltaic devices with concurrent solar energy harvesting and charge storage capability 具有同步太阳能收集和电荷存储能力的有机光伏器件

SPIE Optics + Photonics for Sustainable Energy Pub Date : 2015-09-04 DOI: 10.1117/12.2187671

A. Takshi, Tete Tevi, F. Rahimi

{"title":"Organic photovoltaic devices with concurrent solar energy harvesting and charge storage capability","authors":"A. Takshi, Tete Tevi, F. Rahimi","doi":"10.1117/12.2187671","DOIUrl":"https://doi.org/10.1117/12.2187671","url":null,"abstract":"Due to large variation of the solar energy availability in a day, energy storage is required in many applications when solar cells are used. However, application of external energy storage devices, such as batteries and supercapacitors, increases the cost of solar energy systems and requires additional charging circuitry. This combination is bulky and relatively expensive, which is not ideal for many applications. In this work, a novel idea is presented for making electrochemical devices with dual properties of solar energy harvesting and internal charge storage. The device is essentially a supercapacitor with a photoactive electrode. Energy harvesting occurs through light absorption at one of the electrodes made of a composite of a conducting polymer (i.e. PEDOT:PSS) and a Porphyrin dye. The energy storage takes place in the both photoactive and counter electrode (CE). We have studied the effect of the CE material on the device characteristics. Using Y-Carbon (a commercial available electrode), an open circuit voltage of 0.49 V was achieved in light across the cell with ~1 mF capacitance. The other two choices for CE were activated carbon and carbon nanotube based electrodes. The cyclic voltammetry and impedance spectroscopy demonstrated that the Y Carbon electrode was a better match.","PeriodicalId":142821,"journal":{"name":"SPIE Optics + Photonics for Sustainable Energy","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127125769","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: 4

Ultrafast time-resolved spectroscopy of lead halide perovskite films 卤化铅钙钛矿薄膜的超快时间分辨光谱

SPIE Optics + Photonics for Sustainable Energy Pub Date : 2015-09-04 DOI: 10.1117/12.2187714

M. Idowu, S. Yau, O. Varnavski, T. Goodson

引用次数: 0

Photochemical upconversion of light for renewable energy and more 光化学上转换光为可再生能源等

SPIE Optics + Photonics for Sustainable Energy Pub Date : 2015-09-04 DOI: 10.1117/12.2195424

T. Schmidt, Rowan W. MacQueen

引用次数: 3

Effect of size and composition fluctuations on the luminescent properties of ensemble of InGaAs nano-objects 尺寸和组成波动对InGaAs纳米物体系综发光性能的影响

SPIE Optics + Photonics for Sustainable Energy Pub Date : 2015-09-04 DOI: 10.1117/12.2183491

A. Yakovliev, Roman Holubenko

{"title":"Effect of size and composition fluctuations on the luminescent properties of ensemble of InGaAs nano-objects","authors":"A. Yakovliev, Roman Holubenko","doi":"10.1117/12.2183491","DOIUrl":"https://doi.org/10.1117/12.2183491","url":null,"abstract":"The luminescent properties of InGaAs/GaAs heterostructures with InGaAs nanoscale objects were investigated. Multilayer heterostructures were grown using molecular beam epitaxy technique. The shapes of the photoluminescence spectra were studied in the temperature range from 10 K to 290 K. The electronic spectrum of heterosystems as well as the energy of interband transitions for InGaAs nano-objects were calculated for different sizes and InGaAs component composition. It is shown that the shape of the photoluminescence spectra is determined by the Gaussian distribution of the energy of band-to-band optical transitions between the ground states of the conduction band and valence band of nanoscale objects. The physical reason for the observed energy dispertion is the variation of sizes, heterogeneity of component composition and strain relief in the ensemble of InGaAs nano-objects. Non-monotonous temperature dependence of the width of the photoluminescence spectra indicates the existence of temperature-dependent redistribution of photoexcited charge carriers between neighbouring nanoislands having different energy of the ground states.","PeriodicalId":142821,"journal":{"name":"SPIE Optics + Photonics for Sustainable Energy","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115707250","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