倪萌,M K Leung,K Sumathy
高被引论文摘要
被引频次:123
太阳能电池研究的新进展
倪萌,M K Leung,K Sumathy
简要回顾了第一代晶体硅和第二代薄膜太阳能电池的发展状况并介绍了基于薄膜技术的第三代高性能太阳能电池的基本原理和发展趋势。
太阳能电池;硅;薄膜;第三代太阳能电池
来源出版物:可再生能源, 2004 (2): 9-11
被引频次:116
阴极修饰对染料敏化TiO2太阳能电池性能的改进
范乐庆,吴季怀,黄昀昉,等
摘要:通过对染料敏化TiO2纳米晶太阳能电池中阴极进行修饰来提高电池的光电性能。结果表明:在阴极表面镀上具有催化性能的白金、镍或石墨均可提高电池的光电转化效率(IPCE)、短路电流、开路电压和填充因子等性能。其中白金修饰阴极后,电池的性能较好,IPCE从7.59%升至48.32%,短路电流从0.91 mA升至7.23 mA,开路电压从478 mV升至571 mV以及填充因子从0.09升至0.47。并给出用UV—3100型紫外可见分光光度计测定染料RuL2(SCN)2溶液的吸收光谱。
关键词:TiO2;阴极修饰;纳米晶太阳能电池;光电性能
来源出版物:电子元件与材料, 2003, 22(5): 1-3
被引频次:111
太阳能电池及材料研究
梁宗存,沈辉,李戬洪
摘要:综述了近些年来太阳能电池及材料最新发展和研究现状,对各类太阳能电池的制备方法作了系统的介绍和评估,并从材料、工艺与性能等方面分析了它们的优势和不足之处,最后对太阳能电池的发展趋势进行了讨论和预测。
关键词:太阳能电池;材料;转换效率;薄膜
来源出版物:材料导报, 2000, 14(8): 38-40
被引频次:108
染料敏化纳米晶太阳能电池
杨术明,李富友,黄春辉
摘要:半导体纳米晶颗粒形成的膜具有非常大的比表面积,其表面上可以吸附大量的染料分子,因而可以有效地吸收太阳光,并将其转化为电能。本文介绍了染料敏化纳米晶太阳能电池的基本原理以及电池的结构。从电池各个组成部分分别介绍了染料敏化纳米晶太阳能电池的发展及其研究现状。
关键词:太阳能电池;TiO2纳米晶;染料敏化剂
来源出版物:化学通报, 2002, 65(5): 292-296
被引频次:105
太阳能发电技术综述
于静车,俊铁,张吉月
摘要:本文论述了太阳能的利用技术,重点讨论了太阳能的发电技术,综合介绍了太阳能塔热气流发电技术、太阳能热发电技术和太阳光发电等国内外各种太阳能发电技术,并进行了比较。在阐述各种发电技术的理论与优缺点的基础上,对太阳能发电技术的前景做了探讨。同时,也简要地介绍了我国在太阳能发电技术上的发展现状,指出了我国大力开发太阳能发电系统的有利条件和自然空间。
关键词:太阳能利用技术;光伏发电;太阳能热发电;太阳能电池
来源出版物:世界科技研究与发展, 2008, 30(1): 56-59
被引频次:102
太阳能电池板自动跟踪控制系统的设计
王雪文,王洋,阎军锋,等
摘要:目的:提高太阳能电池的转换效率。方法:光敏电阻光强比较与精确数据处理相结合。结果:设计出了一套自动使太阳能电池板保持与太阳光垂直的控制系统,构建了自动跟踪系统模型。结论:所构建的光敏电阻比较法,达到预期的性能指标,控制精度高,具有广泛的应用潜力。
关键词:太阳能电池;设计;构建;自动跟踪
来源出版物:西北大学学报(自然科学版), 2004, 34(2): 163-164
被引频次:98
纳晶多孔TiO2薄膜电极的化学处理
张东社,刘尧,王维波,等
摘要:水热法和涂敷法制备的两种纳晶多孔TiO2薄膜电极,经四氯化钛和异丙氧醇钛化学处理,其光电流效率和光电转换效率都得到明显提高,通过表面粗糙度、染料吸附量、光电流-电位关系、红外光谱及吸收光谱等性能的测量和分析,对化学处理的机理进行了讨论。
关键词:纳晶多孔TiO2薄膜;染料敏化;化学处理;太阳能电池
来源出版物:科学通报, 2000, 45(9): 929-932
被引频次:97
有机太阳能电池材料研究新进展
张天慧,朴玲钰,赵谡玲,等
摘要:介绍了有机太阳能电池研究的背景、基本原理、分类,并对有机太阳能电池材料进行了全面综述,包括小分子太阳能电池材料、大分子太阳能电池材料、D-A体系材料和有机无机杂化体系材料。
关键词:有机太阳能电池;小分子太阳能电池材料;大分子太阳能电池材料;D-A体系材料;有机无机杂化体系材料
来源出版物:有机化学, 2010, 31(02): 260-272
被引频次:95
太阳能电池研究和发展现状
毛爱华
摘要:总结了单晶硅、多晶硅、非晶硅、CuInSe2,CdTe,GaAs等太阳能电池的结构、性能指标等,介绍了我国和其他一些国家太阳能电池的发展状况。
关键词:太阳电池;发展状况
来源出版物:包头钢铁学院学报, 2002, 21(1): 94-98
被引频次:93
染料敏化太阳能电池的研究进展
陈炜,孙晓丹,李恒德,等
摘要:综述了染料敏化太阳能电池的研究进展,总结了染料敏化太阳能电池关键材料:(1)染料;(2)电极材料;(3)电解质等的研究现状和发展趋势,指出了各自存在的问题,并提出了部分解决设想。
关键词:太阳能电池;染料敏化;纳米电极;固态电解质
来源出版物:世界科技研究与发展, 2004, 26(5): 27-35
被引频次:17004
来源出版物:Nature, 1991, 353(6346): 737-740
被引频次:6451
Polymer photovoltiac cells: Enhanced efficiencies via a network of internal donor-acceptor heterojunctions
Yu, G; Gao, J; Ummelen, JC; et al.
Abstract:The carrier collection efficiency (ηc) and energy conversion efficiency (ηe) of polymer photovoltaic cells were improved by blending of the semiconducting polymer with C60 or its functionalized derivatives. Composite films of poly(2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene) (MEH-PPV) and fullerenes exhibit ηc of about 29 percent of electrons per photon and ηe of about 2.9 percent, efficiencies that are better by more than two orders of magnitude than those that have been achieved with devices made with pure MEH-PPV. The efficient charge separation results from photoinduced electron transfer from the MEH-PPV (as donor) to C60 (as acceptor);
the highcollection efficiency results from a bicontinuous network of internal donor-acceptor heterojunctions.
来源出版物:Science, 1995, 270(5243): 1789-1791
被引频次:4061
High-efficiency solution processable polymer photovoltaic cells by self-organization of polymer blends
Li, G; Shrotriya, V; Huang, JS; et al.
Abstract:Converting solar energy into electricity provides a much-needed solution to the energy crisis the world is facing today. Polymer solar cells have shown potential to harness solar energy in a cost-effective way. Significant efforts are underway to improve their efficiency to the level of practical applications. Here, we report highly efficient polymer solar cells based on a bulk heterojunction of polymer poly(3-hexylthiophene) and methanofullerene. Controlling the active layer growth rate results in an increased hole mobility and balanced charge transport. Together with increased absorption in the active layer, this results in much-improved device performance, particularly in external quantum efficiency. The power-conversion efficiency of 4.4% achieved here is the highest published so far for polymer-based solar cells. The solution process involved ensures that the fabrication cost remains low and the processing is simple. The high efficiency achieved in this work brings these devices one step closer to commercialization.
来源出版物:Nature Materials, 2005, 4(11): 864-868
被引频次:4010
Nanowire dye-sensitized solar cells
Law, M; Greene, LE; Johnson, JC; et al.
Abstract:Excitonic solar cells-including organic, hybrid organic inorganic and dye-sensitized cells (DSCs)-are promising devices for inexpensive, large-scale solar energy conversion. The DSC is currently the most efficient and stable excitonic photocell. Central to this device is a thick nanoparticle film that provides a large surface area for the adsorption of light-harvesting molecules. However, nanoparticle DSCs rely on trap-limited diffusion for electron transport, a slow mechanism that can limit device efficiency, especially at longer wavelengths. Here we introduce a version of the dye-sensitized cell in which the traditional nanoparticle film is replaced by a dense array of oriented, crystalline ZnO nanowires. The nanowire anode is synthesized by mild aqueous chemistry and features a surface area up to one-fifth as large as a nanoparticle cell. The direct electrical pathways provided by the nanowires ensure the rapid collection of carriers generated throughout the device, and a full Sun efficiency of 1.5% is demonstrated, limited primarily by the surface area of the nanowire array.
来源出版物:Nature Materials, 2005, 4(6): 455-459
被引频次:3710
Hybrid nanorod-polymer solar cells
Huynh, WU; Dittmer, JJ; Alivisatos, AP
Abstract:We demonstrate that semiconductor nanorods can be used to fabricate readily processed and efficient hybrid solar cells together with polymers. By controlling nanorod length, we can change the distance on which electrons are transported directly through the thin film device. Tuning the band gap by altering the nanorod radius enabled us to optimize the overlap between the absorption spectrum of the cell and the solar emission spectrum. A photovoltaic device consisting of 7-nanometer by 60-nanometer CdSe nanorods and the conjugated polymer poly-3(hexylthiophene) was assembled from solution with an external quantum efficiency of over 54% and a monochromatic power conversion efficiency of 6.9% under 0.1 milliwatt per square centimeter illumination at 515 nanometers. Under Air Mass (A.M.) 1.5 Global solar conditions, we obtained a power conversion efficiency of 1.7%.
来源出版物:Science, 2002, 295(5564): 2425-2427
被引频次:3588
Porphyrin-sensitized solar cells with cobalt (II/III)–based redox electrolyte exceed 12 percent efficiency
Yella, A; Lee, HW; Tsao, HN; et al.
Abstract:The iodide/triiodide redox shuttle has limited the efficiencies accessible in dye-sensitized solar cells. Here, we report mesoscopic solar cells that incorporate a Co(II/III)tris(bipyridyl)–based redox electrolyte in conjunction with a custom synthesized donor-π-bridge-acceptor zinc porphyrin dye as sensitizer (designated YD2-o-C8). The specific molecular design of YD2-o-C8 greatly retards the rate of interfacial back electron transfer from the conduction band of the nanocrystalline titanium dioxide film to the oxidized cobalt mediator, which enables attainment of strikingly high photovoltages approaching 1 volt. Because the YD2-o-C8 porphyrin harvests sunlight across the visible spectrum, large photocurrents aregenerated. Cosensitization of YD2-o-C8 with another organic dye further enhances the performance of the device, leading to a measured power conversion efficiency of 12.3% under simulated air mass 1.5 global sunlight.
来源出版物:Sience, 2011, 334(6056): 629-634
被引频次:3585
Thermally stable, efficient polymer solar cells with nanoscale control of the interpenetrating network morphology
Ma, WL; Yang, CY; Gong, X; et al.
Abstract:By applying the specific fabrication conditions summarized in the Experimental section and postproduction annealing at 150 °C, polymer solar cells with power-conversion efficiency approaching 5 % are demonstrated. These devices exhibit remarkable thermal stability. We attribute the improved performance to changes in the bulk heterojunction material induced by thermal annealing. The improved nanoscale morphology, the increased crystallinity of the semiconducting polymer, and the improved contact to the electron-collecting electrode facilitate charge generation, charge transport to, and charge collection at the electrodes, thereby enhancing the device efficiency by lowering the series resistance of the polymer solar cells.
来源出版物:Advanced Functional Materials, 2005, 15(10): 1617-1622
被引频次:3511
Detailed balance limit of efficiency ofp‐njunction solar cells
Shockley, W; Queisser, HJ
Abstract:In order to find an upper theoretical limit for the efficiency ofp‐njunction solar energy converters, a limiting efficiency, called thedetailed balance limitof efficiency, has been calculated for an ideal case in which the only recombination mechanism of hole‐electron pairs is radiative as required by the principle of detailed balance. The efficiency is also calculated for the case in which radiative recombination is only a fixed fractionfcof the total recombination, the rest being nonradiative. Efficiencies at the matched loads have been calculated with band gap andfcas parameters, the sun and cell being assumed to be blackbodies with temperatures of 6000°K and 300°K, respectively. The maximum efficiency is found to be 30% for an energy gap of 1.1 ev andfc= 1. Actual junctions do not obey the predicted current‐voltage relationship, and reasons for the difference and its relevance to efficiency are discussed.
来源出版物:Journal of Applied Physics, 1961, 32(3): 510-519
被引频次:3188
Two‐layer organic photovoltaic cell
Tang, CW
Abstract:A thin‐film, two‐layer organic photovoltaic cell has been fabricated from copper phthalocyanine and a perylene tetracarboxylic derivative. A power conversion efficiency of about 1% has been achieved under simulated AM2 illumination. A novel feature of the device is that the charge‐generation efficiency is relatively independent of the bias voltage, resulting incells with fill factor values as high as 0.65. The interface between the two organic materials, rather than the electrode/organic contacts, is crucial in determining the photovoltaic properties of the cell.
来源出版物:Applied Physics Letters, 1986, 48(2): 183-185
被引频次:3185
Plastic solar cells
Brabec, CJ; Sariciftci, NS; Hummelen, JC
Abstract:Recent developments in conjugated-polymer-based photovoltaic elements are reviewed. The photophysics of such photoactive devices is based on the photo-induced charge transfer from donor-type semiconducting conjugated polymers to acceptor-type conjugated polymers or acceptor molecules such as Buckminsterfullerene, C-60. This photo-induced charge transfer is reversible, ultrafast (within 100 fs) with a quantum efficiency approaching unity, and the charge-separated state is metastable (up to milliseconds at 80 K). Being similar to the first steps in natural photosynthesis, this photo-induced electron transfer leads To a number of potentially interesting applications, which include sensitization of the photoconductivity and photovoltaic phenomena. Examples of photovoltaic architectures are presented and their potential in terrestrial solar energy conversion discussed. Recent progress in the realization of improved photovoltaic elements with 3% power conversion efficiency is reported.
来源出版物:Advanced Functional Materials, 2001, 11(1): 15-26
A low-cost, high-efficiency solar cell based on dye-sensitized
Oregan, B; Ratzel, M
The large-scale use of photovoltaic devices for electricity generation is prohibitively expensive at present: generation from existing commercial devices costs about ten times more than conventional methods 1. Here we describe a photovoltaic cell, created from low-to mediumpurity materials through low-cost processes, which exhibits a commercially realistic energy-conversion efficiency. The device is based on a 10-μm-thick, optically transparent film of titanium dioxide particles a few nanometres in size, coated with a monolayer of a charge-transfer dye to sensitize the film for light harvesting. Because of the high surface area of the semiconductor film and the ideal spectral characteristics of the dye, the device harvests a high proportion of the incident solar energy flux (46%) and shows exceptionally high efficiencies for the conversion of incident photons to electrical current (more than 80%). The overall light-to-electric energy conversion yield is 7.1-7.9% in simulated solar light and 12% in diffuse daylight. The large current densities (greater than 12 mA cm-2) and exceptional stability (sustaining at least five million turnovers without decomposition), as well as the low cost, make practical applications feasible.