Comparison between P25 and anatase-based TiO<Subscript>2</Subscript> quasi-solid state dye sensitized solar cells

Pure anatase TiO2 films have been made via hydration of titanium isopropoxide using a sol-gel tech-nique, while mixed TiO2 films which contained both anatase and rutile TiO2 were made from commercial P25 powder. Quasi-solid state dye-sensitized solar cells were fabricated with these two kinds of mesoporous films and a comparison study was carried out. The result showed that the open-circuit photovoltages （Voc） for both kinds of cells were essentially the same, whereas the short-circuit photo-currents （1sc） of the anatase-based cells were about 33% higher than that of the P25-based cells. The highest photocurrent intensity of the anatase-based cell was 6.12 mA/cm^2 and that of the P25-based cell was 4.60 mA/cm^2. Under an illumination with the light intensity of 30 mW/cm^2, the corresponding energy conversion efficiency was measured to be 7.07% and 6.89% for anatase-based cells and P25-based cells, respectively.     

Performances improvement of eosin Y sensitized solar cells by modifying TiO_2 electrode with silane-coupling reagent

Chemical fixing of xanthene dye (eosin Y) on the surface of TiO2 electrode was carried out by modifying the electrode with silane-coupling reagent to obtain stable dye-sensitized TiO2 electrode. Such silane modification can not only evidently enhance the stability of dye-sensitized TiO2 electrode but also im-prove the energy conversion efficiency of the assembled cells by increasing short-circuit photocurrent (JSC) and open-circuit photovoltage (VOC). It was found that the improvements of cell performances ...     

A new type quasi-solid state electrolyte for dye-sensitized solar cells

Dye-sensitized nanocrystalline TiO2 thin film solar cells (DSSCs) have attracted worldwide attention be- cause of their high efficiencies and low cost compared with the conventional silicon solar cells. An impressive conversion efficiency exceeding 10% wa…     

染料敏化太阳能电池光阳极及其敏化研究进展

染料敏化太阳能电池是近十几年来发展起来的新型的高效率、低成本的光电池。起负载敏化剂以及收集和传输电子作用的光阳极是关系到该电池性能的重要部件,且其敏化的效果是整个光电池光电转换效率的关键。本文介绍染料敏化纳米晶TiO2太阳能电池的基本结构和工作原理,从原理上指出了光阳极提高和改进的目标所在。综述了作为光阳极的纳米晶TiO2薄膜的分类及常用的制备方法和敏化方法。在制备技术方面,指出丝网印刷技术由于其大面积制备的可操作性,是实现未来工业化的手段,但它依然需要改进和优化;在染料敏化上,寻找低成本、高性能的敏化剂将是今后研究的重点。通过光敏化。获得具有好的光收集效率、快速的电荷传输以及优越的抑制电荷复合性能的多孔膜,将是未来染料敏化纳米晶TiO2太阳能电池光阳极研究的方向。     

Fabrication of a TiO2-P25/(TiO2-P25+TiO2 nanotubes) junction for dye sensitized solar cells

The dye sensitized solar cell（DSSC）, which converts solar light into electric energy, is expected to be a promising renewable energy source for today’s world. In this work, dye sensitized solar cells, one containing a single layer and one containing a double layer, were fabricated. In the double layer DSSC structure, the under-layer was TiO₂-P25 film, and the top layer consisted of a mixture of TiO₂-P25 and TiO₂ nanotubes. The results indicated that the efficiency of the DSSC with the double layer structure was a significant improvement in comparison to the DSSC consisting of only a single film layer. The addition of TiO₂-P25 in the top layer caused an improvement in the adsorption of dye molecules on the film rather than on the TiO₂ nanotubes only. The presence of the TiO₂ nanotubes together with TiO₂-P25 in the top layer revealed the enhancement in harvesting the incident light and an improvement of electron transport through the film.     

High conversion efficiency of pristine TiO<Subscript>2</Subscript> nanotube arrays based dye-sensitized solar cells

We prepared highly-ordered titanium dioxide nanotube arrays (TNAs) by anodizing Ti foils in F-containing electrolytes.The crystalline nature and morphology of the TNAs were studied using X-ray diffraction patterns and scanning electron microscopy.We found the morphology of TNAs affects the light-to-electricity conversion efficiency (η) of dye-sensitized solar cells (DSSCs).The efficiency of DSSCs reached 5.95% under the condition of light illuminated from the counter electrode.The high efficiency of TNA-based DSSCs was attributed to the neat top surface of TNAs,which allows more dye molecule loading on the surface of the TiO 2 nanotubes,and fewer electron recombination centers and a low interface resistance of integrated TNAs.     

大面积染料敏化太阳能电池的结构组件设计与性能测试

介绍了大面积染料敏化太阳能电池（DSC）的制备和设计思路,探讨了电阻对大面积染料敏化太阳电池光伏特性的影响,给出了解决这一问题的途径,并进行了内部串联（DSC）与内部并联（DSC）两种组件的性能测试。     

基于SQ2染料与P3HT的固态染料敏化太阳能电池

将近红外吸收染料SQ2与可见光吸收空穴传输材料P3HT结合起来制备固态染料敏化太阳能电池,并用锂盐对TiO2/SQ2表面进行处理来调节器件的光伏性能.通过模拟太阳光照射测试和单色光量子转换效率(IPCE)测试来研究器件的光电性能.测试结果表明,经过锂盐处理后,器件的短路电流(JSC)、填充因子(FF)和转换效率都获得提升.IPCE测试显示,经过锂盐处理后器件在P3HT吸收光谱范围内产生的量子效率没有变化,但在SQ2吸收光谱范围内产生的量子效率明显提升.通过分析得出结论是：锂盐处理不能提高P3HT所吸收的光量子转换效率,但可以提升SQ2染料所吸收的光量子转换效率,进而提高了固态染料敏化太阳能电池的光电转换效率.     

TiO<Subscript>2</Subscript>@MgO core-shell film: Fabrication and application to dye-sensitized solar cells

In this study,TiO2@MgO core-shell film was obtained by using a simple chemical bath deposition method to coat a thin MgO film around TiO2 nanoparticles. The core-shell configuration was characterized by X-ray diffractometer (XRD),scanning elec-tron microscopy (SEM),energy dispersive X-ray spectroscopy (EDX),and high-resolution transmission electron microscopy (HRTEM). Lattice fringes were observed for the TiO2 particles,and the MgO shell showed an amorphous structure,revealing a clear distinction between the core and shell materials. Applying the core-shell film as photoanode to the dye-sensitized solar cells (DSSCs),it shows a superior performance compared to the pure TiO2 electrode. Under the illumination of simulated sunlight (75 mW-cm-2),the short circuit photocurrent (Jsc),the open circuit photovoltage (Voc),and the fill factor (fF) are 8.80 mA-cm-2,646 mV,and 0.69,respectively,and the conversion efficiency (η) in-creased by 21.8% (from 4.32% to 5.26%) when dipping for opti-mum condition.     

Quasi—solid—state nanocrystalline TiO2 solar cells using gel network polymer electrolytes based on polysiloxanes

A quasi-solid-state dye-sensitized manocrystal-line porous TiO2 film solar cell was fabricated using a novel gel network polymer electrolyte based on polysiloxanes with both polyethylene oxide internal plasticized side chains and quaternary ammonium groups.The cell exhibited better photoelectrical conversion performance under 60 mW/cm^2 irradiation.The short photocurrnt (Isc) of 5.0mA/cm^2 and open voltage(Voc) of 0.68V were achieved,and the energy conversion efficiency(η) and fill factor (ff) were 3.4% and 0.60,respectively.     

Electrolytes in solid-state dye-sensitized nanocrystalline solar cells

In this paper, the structure and operating principle of the dye-sensitized nanocrystalline solar cells (DSSC) are discussed. The electrolytes can be divided into three types: liquid electrolyte, quasi-solid electrolyte and solid electrolyte. Based on the relevant study of our group, we summarized mainly the research progress of the quasi-solid electrolyte and solid electrolyte in solid-state DSSC.     

Performances improvement of eosin Y sensitized solar cells by modifying TiO2 electrode with silane-coupling reagent

Chemical fixing of xanthene dye （eosin Y） on the surface of TiO2 electrode was carried out by modifying the electrode with silane-coupling reagent to obtain stable dye-sensitized TiO2 electrode. Such silane modification can not only evidently enhance the stability of dye-sensitized TiO2 electrode but also improve the energy conversion efficiency of the assembled cells by increasing short-circuit photocurrent （Jsc） and open-circuit photovoltage （Voc）. It was found that the improvements of cell performances differ depending on the composition of the electrolyte. The optimum cell of the cell performance was achieved in the electrolyte with 0.5 mol/L TBAI/0.05 mol/L 12/EC：PC（3：1 w/w）, yielding Jsc of 4.69 mA. cm-2, Voc of 0,595 V, fill factor （FF） of 0.64 and ηof 1,78%, Different spectroscopic techniques including UV-Vis spectra, fluorescence spectra, EIS and dark current measurements were employed to derive reasonable analysis and explanations.     

TiO_2纳米管制备及其在染料敏化太阳能电池中的应用

采用强碱水热法由钛粉和NaOH溶液水热反应合成二氧化钛纳米管,并用透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X-射线电子衍射(XRD)等表征手段对反应产物进行表征,该方法制备的二氧化钛纳米管长度为200～300 nm,管径为20～25 nm.采用丝网印刷技术将二氧化钛纳米管粉末印制在掺杂氟的SnO2导电玻璃(FTO)上,并进行热处理.随后,将印制了薄膜的FTO导电玻璃浸泡在染料中,浸泡一段时间后,将其与导电面涂了铂的FTO导电玻璃组装成染料敏化太阳能电池,并对电池性能进行测试.在模拟太阳光照射下,该电池的填充因子为0.43,短路电流为0.48 mA,断路电压为0.35 V,光电转换效率为0.07%.     

Quasi-solid state dye-sensitized solar cells based on pyridine or imidazole containing copolymer chemically crosslinked gel electrolytes

Quasi-solid state dye-sensitized solar cells based on chemically crosslinking with backbone polymers of poly(vinylpyridine-co-acrylonitrile) (P(VP-co-AN)) or poly(vinylimidazole-co-acrylonitrile) (P(VIM-co- AN)) and diiodide compounds of I(CH2)6I or I(CH2CH2O)nCH2CH2I solidified EC/PC/KI/I2 gel electrolytes have been fabricated. The ionic conductivities and apparent diffusion coefficients of I3? of the electro- lytes and cell performances have been investigated. Providing chemically crosslinking points, pyridine or imidazole from the backbone polymers benefited the open circuit voltage and fill factor of the cells. Consequently, the overall energy conversion efficiencies of the quasi-solid DSSCs improved over 10% even near 20% from that of the liquid electrolyte before solidification. Besides, the employing of crosslinker I(CH2CH2O)nCH2CH2I showed higher electrolytic and cell characters than that of I(CH2)6I.     

二氧化钛纳米管复合薄膜电极制备及其在染料敏化太阳能电池中的应用

采用强碱水热法合成二氧化钛纳米管,并与二氧化钛纳米颗粒混合作为染料敏化太阳能电池电极材料.当纳米管与纳米颗粒按照1:1摩尔比混合时,经过500℃烧结1h后,转化成锐钛矿晶型;平均孔体积0.30 cm3/g,平均孔径11.42 nm,比表面积为105.58 m2/g;电极对染料的吸附量达到4.85×10-8mol/cm2;电池的短路光电流密度8.70 mA/cm2,开路光电压0.76 V,填充因子0.60,光电转化效率3.96%.     

染料敏化太阳能电池纳晶TiO2多孔薄膜研究进展

染料敏化太阳能电池(DSSC)是一种非常有前途的清洁太阳能光电转化装置.其中,光阳极是DSC的工作电极,起着吸附染料分子、接收和传输电子的作用.阳极的微结构(孔径、孔隙率、粗糙因子)和组成对于提高电池的光电催化、转化效率具有决定作用.主要综述了染料敏化太阳能电池中TiO2光阳极的制备、改性方法以及添加剂对纳晶TiO2多...     

低聚3-噻吩甲酸对纳晶TiO_2电极的敏化

通过光照化学聚合法合成低聚3-噻吩甲酸太阳能电池光敏染料,对染料的光、电化学性能进行测定.结果表明在模拟太阳光AM1.5照射下,以其为染料敏化剂的太阳能电池的光电转换效率达到0.12%.该染料具有良好的吸附性和光稳定性,适于用作太阳能电池的光敏染料.     

Preparation of porous nanoparticle TiO_2 films for flexible dye-sensitized solar cells

A TiO2 paste was prepared by mixing commercial TiO2 (P25), ethanol, distilled water and a small amount of Ti (IV) tetrai-sopropoxide (TTIP), following by a hydrothermal treatment. Before hydrothermal treatment, a stirring for 48 h can prevent cracking TiO2 films. TTIP significantly promote the chemical connection between TiO2 particles and its adherence to the substrate, the TTIP amount of 6 mol% is suitable. UV irradiation can remove some impurities and water from the TiO2 film with an optimal time of 2 h....     

Preparation of nano-crystal N-Zn/TiO<Subscript>2</Subscript> anode films and the effects of co-sensitization on the performance of dye-sensitized solar cells

A nano-crystal N-Zn/TiO₂ anode film was prepared using a combined technology. X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy and cyclic voltammetry characterizations showed that the two elements N and Zn were doped into nano-crystal TiO₂ successfully. This resulted in a strong redshift in the UV-Visible spectrum. UV-Visible measurements showed that the light absorption of N719 and P3OT were complementary and covered the entire visible region. This led to a high utilization of visible light. Solar cells based on the N-Zn/TiO₂ anode film were co-sensitized using P3OT and N719. The cells have a short-circuit current density of 7.91 mA/cm², an open-circuit photovoltage of 0.659 V, and a photoelectric conversion efficiency of 2.64%. Also, the relationship among the N-Zn/TiO₂-film anode’s electric structure, the dye’s LUMO, electrochemical impedance, and photoelectric conversion efficiency are discussed in the paper.     

Nanostructured SnO2 photoanode-based dye-sensitized solar cells

This review focuses on recent developments in the nanostructured SnO2 photoanodes for dye-sensitized solar cells （DSSCs） applications. Carefully designed and fabricated nanostructured SnO2 films are advantageous for effective improvement in performance of DSSCs. Nano- crystals can offer a large surface area for dye adsorption; nanowires are able to provide a direct transfer pathway for the rapid collection of photogenerated electrons; the mes- oporous, monodisperse beads with a submicrometer-sized diameter ensure a large specific surface area for dye adsorption and simultaneously promote light scattering; the surface modification of SnO2 by other oxides may improve the photovoltage and photocurrent, hence resulting in the higher power conversion efficiency of SnO2-based DSSCs.