染料敏化太阳能电池阻挡层的制备及其性能研究

采用电子束蒸发法在光阳极导电玻璃基底上制备了一层致密的TiO2薄膜,并在氧氛围下进行不同温度的退火处理。以此TiO2薄膜为阻挡层来阻止电解质溶液中I3-与导电玻璃基底上光生电子的复合。分别利用X射线衍射（XRD）和X射线光电子能谱（XPS）对此薄膜的结构和成分进行表征。制备不同厚度的TiO2阻挡层薄膜并研究其对电池光电性能的影响。实验结果表明,阻挡层的引入有效地抑制了暗反应的发生,提高了染料敏化太阳能电池（DSSC）的开路电压、短路电流和光电转换效率,比未引入阻挡层的DSSC的光电转换效率提高了31.5%。     

TiO2介孔薄膜电阻对染料敏化太阳能电池光电转换性能的影响

TiO2介孔薄膜的电阻可能是影响染料敏化太阳能电池光电转化效率的主要因素之一.设计了一种可用于测试TiO2介孔薄膜电阻的方法,研究了2种不同电阻值的TiO2介孔薄膜的电阻变化规律和2种TiO2介孔薄膜组装的染料敏化太阳能电池(DSC)的光电转换性能.结果显示,采用低电阻的TiO2薄膜光电极有利于DSC光电转换效率的提高.     

丝网印刷法制备染料敏化太阳能电池光电性能的研究

采用水热法制备TiO2纳米颗粒,将获得的TiO2纳米颗粒制备成胶体,采用丝网印刷法在FTO表面刷涂制备染料敏化太阳能电池（DSSC）光阳极,通过扫描电子显微镜对电极表征和电池光电性能测试,探讨印刷层数及入射光强对DSSC光电性能的影响,实验结果表明,将制备的光阳极组装成电池后具有较好的光电性能,当印刷层数为8层、光强为80W／m2时,电池取得最好的光电性能。     

用背反射提高染料敏化太阳能电池光电转换效率的研究

当光射入染料敏化太阳能电池(DSCs)时,有部分光不能被染料、电解液、导电玻璃等吸收,这部分光将透过电池而未被利用,本研究利用普通镀铝玻璃镜做为背底,将这部分透射光通过背反射重新射入电池来提高DSCs的光电转换效率.研究结果表明,背反射能大幅度提高DSCs的短路电流,短路电流的增加率随着测试遮光罩开孔尺寸的增加而增加,并且随纳米TiO2薄膜厚度的增加而降低.     

染料敏化太阳能电池中电解质的研究进展

染料敏化太阳能电池是一种新型的太阳能电池（DSSC）。简要介绍了染料敏化太阳能电池的结构和基本原理，根据太阳能电池中电解质的类型分为液体电解质、准固态电解质和固体电解质，分别讨论了其研究进展及优缺点，同时对未来染料敏化太阳能电池的发展进行了展望。     

染料敏化太阳能电池的研究进展

近年来,染料敏化太阳电池以其简单的制作工艺,低廉的生产成本,较高的转换效率和光明的发展前景,已经成为国际上的研究热点。本文介绍了染料敏化太阳电池的研究背景和发展过程,简述了基于纳米TiO2半导体电极材料的太阳能电池的基本结构和工作机理,,并且就染料敏化太阳电池存在的问题和发展前景给予论述。     

染料敏化太阳能电池光阳极的研究进展

染料敏化太阳能电池(DSSC)具有成本低、质量轻、来源广等优点,是现有硅太阳能电池的替代品之一,应用前景广阔。DSSC制备的关键在于基材及与之相关的光阳极材料的制备。综述了光阳极近年的发展情况,详细分析了离子掺杂、基于微观结构改性的复合结构、表面处理和替代二氧化钛光阳极。水热法、电沉积法是目前制备高效光阳极的主要方法。最后对光阳极的研究方向进行了总结,并展望了未来染料敏化太阳能的发展趋势。     

染料敏化太阳能电池的研究进展

综述了近年来关于染料敏化太阳能电池制备的研究状况,详细介绍了国内外关于二氧化钛薄膜、反电极、染料和电解质的设计思路及制备情况,并讨论了制备方法对太阳能电池性能的影响.     

TiO_2薄膜制备工艺对染料敏化太阳能电池性能的影响

采用溶胶提拉法、粉末刮涂法以及将两种方法结合的混合涂覆法制备了TiO2薄膜,对不同工艺制备的TiO2薄膜进行了金相观察,并将薄膜组装成电池进行伏安曲线测试。I-V曲线表明,与溶胶提拉法和粉末刮涂法制备的TiO2薄膜相比,混合涂覆法综合了两者薄膜的结构优点,用此法制备出的TiO2薄膜组装成的染料敏化太阳能电池具有较大的光电流、光电压和最大输出功率。     

染料敏化太阳能电池的研究进展

本文介绍了染料敏化太阳能电池的基本结构和原理，并对光电极、敏化染料、电解质的研究进展及其发展趋势进行了概述。     

Enhancement of photovoltaic performance in dye-sensitized solar cells with the spin-coated TiO2 blocking layer

The TiO2 thin film layers were introduced with the spin-coating method between FTO electrode and TiO2 photoanode in dye sensitized solar cell (DSSC) to prevent electron back migration from the FTO electrode to electrolyte. The DSSC containg different thickness of TiO2 thin film (10-30, 40-60 and 120-150 nm) were prepared and photovoltaic performances were analysed with /-Vcurves and electrochemical impedance spectroscopy. The maximum cell performance was observed in DSSC with 10-30 nm of TiO2 thin film thickness (11.92 mA/cm2, 0.74 V, 64%, and 5.62%) to compare with that of pristine DSSC (11.09 mA/cm2, 0.65 V, 62%, and 4.43%). The variation of photoelectric conversion efficiency of the DSSCs with different TiO2 thin film thickness was discussed with the analysis of crystallographic and microstructural properties of TiO2 thin films.     

种子层对染料敏化ZnO纳米棒光伏电池性能的影响

用射频溅射法在透明导电玻璃上分别沉积了氧化锌（ZnO）和掺铝氧化锌（AZO）薄膜，其可见光透射率达到85％以上。用水热法在不同的薄膜作种子层的导电玻璃上生长了纳米棒，x射线衍射分析（XRD）发现所制得的纳米棒都有（002）择优取向；扫描电子显微镜（SEM）结果表明，采用不同的实验条件和参数可以有效的影响纳米棒的长度、直径、密度等，并得到了垂直于衬底的纳米结构。用所得到的纳米结构制作太阳能电池的效率达到了0．26％。     

Fabrication of dye-sensitized solar cells using Nb2O5 blocking layer made by sol-gel method

In this study, nanocrystalline Nb2O5 thin film has been prepared via sol-gel process using niobium ethoxide as a precursor. Sol-gel films using various ratios of H2O/Nb have been prepared on fluorinated tin oxide (FTO) glass substrate, and used as electron-blocking layer of dye-sensitized solar cell (DSSC). The Nb2O5 film as deposited was amorphous, but became crystalline with hexagonal phase after heat treatment at 600 degrees C. With higher H2O/Nb molar ratio, denser and more uniform Nb2O5 film surface was obtained. DSSCs with the structure of FTO/Nb2O5/TiO2/Dye/EL/Pt/FTO have been prepared, and their solar-cell performance was evaluated. By introduction of Nb2O5 sol-gel film between FTO and TiO2 layer in DSSCs, energy conversion efficiency could be improved.     

Effects of ZnO nanowire synthesis parameters on the photovoltaic performance of dye-sensitized solar cells

Determination of the effects of ZnO nanowires on the efficiency of ZnO nanowire-based dye-sensitized solar cells (DSSCs) is important. In this study, we determined the effects of different OH^- precursors, concentrations, the ratio of zinc nitrate to hexamethylene tetramine (HMT), and the hydrothermal synthesis temperature on the physical, crystal, and optical properties of ZnO nanowires and investigated the performance of the resulting DSSCs. We observed that ZnO nanowires synthesized using an equimolar ratio of HMT to zinc nitrate yielded a DSSC with high incident photon-to-current efficiency (IPCE), cell efficiency, short circuit current density (J_sc), and fill factor (FF), and low ZnO-dye-electrolyte interface resistance due to an increased amount of dye and a decreased density of defects. Furthermore, ZnO nanowires made using optimal concentrations and ratios of zinc nitrate to HMT had a high surface area and low defect density. All the photovoltaic performance parameters of DSSCs assessed such as IPCE, cell efficiency, J_sc, open circuit potential (V_oc), and FF increased with synthesis temperature, which was related to a decrease in the resistance at the ZnO-dye-electrolyte interface. We attributed these results to an increased amount of dye facilitated by a large nanowire surface area and fast electron transfer because of the improved crystalline structure of the ZnO nanowires and their low defect density. By optimizing the ZnO nanowires, we increased DSSC efficiency to 0.26% using ZnO nanowires synthesized with 25 mM of both zinc nitrate and HMT at 90 °C, while only a 0.02% increase in efficiency was obtained when NH₄OH was used as OH⁻ precursor.     

铜酞菁与富勒烯共混层对柔性薄膜太阳电池光伏性能的影响

在柔性PET-ITO衬底上制备了结构为ITO/CuPc/CuPc:C60/C60/Al的柔性薄膜太阳电池.结果发现,共混层的嵌入,可增大给体/受体界面,提高激子扩散效率,从而提高器件光电转换效率.当共混层CuPc与C60>的摩尔比为1 : 2时,光吸收效率较高,且共混层颗粒均匀分散,光电转换效率达0.63%.     

Influences of deposition and post-annealing temperatures on properties of TiO2 blocking layer prepared by spray pyrolysis for solid-state dye-sensitized solar cells

Influences of the temperature (T_s) for spray pyrolysis deposition of TiO₂ blocking layer (BL) using titanium diisopropoxide bis(acetylacetonate) (TAA) as a precursor and the temperature (T_p) for post-annealing of the BL films on the resulting BL film morphology and photovoltaic performance of solid-state dye-sensitized solar cells (SDSC) are investigated. A T_s ranging from 300 to 400 °C is found preferable for the formation of BL films with smooth surface and dense grain packing. A T_s lower than 300 °C results in insufficient decomposition of the TAA precursor and is unable to form smooth BL films, while a T_s over 400 °C leads to loosely packed grain in BL films. Power conversion efficiency (PCE) of ~ 4.0% is obtained for SDSC devices with BL films prepared at a T_s in the range of 300-450 °C. High temperature post-annealing (T_p = 500-550 °C) of the BL films prepared at a low T_s, such as 300 °C, can improve the PCE up to 4.6%. The improvements are considered due to the higher purity, increased crystallinity, and retained high grain packing density of the post-annealed BL films, which facilitate charge transport and suppress charge recombination.     

Block copolymer morphologies in dye-sensitized solar cells: probing the photovoltaic structure-function relation

We integrate mesostructured titania arrays into dye-sensitized solar cells by replicating ordered, oriented one-dimensional (1D) columnar and three-dimensional (3D) bicontinuous gyroid block copolymer phases. The solar cell performance, charge transport, and recombination are investigated. We observe faster charge transport in 1D "wires" than through 3D gyroid arrays. However, owing to their structural instability, the surface area of the wire arrays is low, inhibiting the solar cell performance. The gyroid morphology, on the other hand, outperforms the current state-of-the-art mesoporous nanoparticle films.     

The effect of growth conditions on the properties of ZnO nanorod dye-sensitized solar cells

In this article, we report ZnO nanorod samples grown on transparent conductive SnO₂:F (FTO) glass substrates by two different growth routes through hydrothermal method in a closed autoclave. One route is one-step continuous growth for 10 h. The other route is discrete multi-step growth for total 48 h. In this process, fresh solution was repeatedly introduced in every step. The structural, photoluminescence (PL) and photovoltaic properties of the as-prepared nanorod arrays were investigated. The nanorod arrays obtained through multi-step growth show longer rods, higher aspect ratio, larger spacing, better crystalline quality. The PL spectrum of nanorod arrays obtained through multi-step growth shows a strong and sharp near-band-gap emission (UV) peak and a weak green-yellow emission (GY) peak (I_UV/I_GY = 7.7), which also implies its good crystallinity and high optical quality. Dye-sensitized solar cells based on ZnO nanorod arrays were fabricated, and those grown with discrete multi-step procedure present better photovoltaic properties duo to its special morphology and better crystal quality.     

Ion coordinating sensitizer for high efficiency mesoscopic dye-sensitized solar cells: influence of lithium ions on the photovoltaic performance of liquid and solid-state cells

A Li+ coordinating sensitizer, NaRu(4-carboxylic acid-4'-carboxylate)(4,4'-bis[(triethylene glycol methyl ether) methyl ether]-2,2'-bipyridine)(NCS)2 (coded as K51), has been synthesized, and the effect of Li+ coordination on its performance in mesoscopic titanium dioxide dye-sensitized solar cells has been investigated. Fourier transform infrared spectra suggest that Li+ coordinates to the triethylene oxide methyl ether side chains on the dye molecules. With the addition of Li+ to a nonvolatile liquid electrolyte, we observe a significant increase in the photocurrent density, with only a small decrease in the open-circuit voltage, contrary to a non ion coordinating dye which displays a large drop in potential with the addition of Li+. For a solar cell incorporating an organic hole-transporter, we find the potential rises with increasing the Li+ concentration in the hole-transporter matrix. For the liquid electrolyte and solid-state cells, we obtain power conversion efficiencies of 7.8% and 3.8%, respectively, under simulated sunlight.