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Enhanced photovoltaic properties of overlayer-coated nanocrystalline TiO2 dye-sensitized solar cells (DSSCs) 总被引:1,自引:0,他引:1
Jin Young Kim Sangwook Lee Jun Hong Noh Hyun Suk Jung Kug Sun Hong 《Journal of Electroceramics》2009,23(2-4):422-425
TiO2 dye-sensitized solar cells (DSSCs) coated with various oxide layers were fabricated via a screen printing method and the effects of the oxide layers on the photovoltaic properties were systematically investigated. The open circuit voltage (V oc) was closely dependent to the conduction band (CB) edge position and the band gap energy (E g) of the oxide layers, while the short circuit current density (J sc) was related to the iso-electric point (IEP). V oc showed an increasing behavior with the CB edge position of the oxide layers, which could be explained by the blocking effect of the insulating layers. Although J sc was basically proportional to the IEP and the resulting dye adsorption, there were other factors like the resistance of oxide layers. The cell efficiency could be enhanced by 60% when the cells were coated with the oxide layers of high E g and IEP. 相似文献
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采用溶液浸渍法在ITO导电玻璃表面的多孔TiO2薄膜上沉积了FeS2薄膜.在硫气氛中热处理后,制得了FeS2/TiO2复合薄膜.采用FeS<,2./TiO2薄膜作为正电极组装成色素增感太阳电池(DSSC).应用X射线衍射仪(XRD)、扫描电镜(SEM)、数显测厚指示表、可见-紫外分光光度计、XJCM-8型太阳电池测试仪等研究了FeS2/TiO2薄膜的不同热处理条件、薄膜表面形貌、厚度、吸光度以及光电性能.结果表明:此方法制得的FeS2/TiO2复合薄膜具有良好的光电性能,适宜用于制备DSSC电池. 相似文献
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根据电子在半导体中的扩散理论,建立了模拟染料敏化太阳电池(DSSC)J-V输出特性的数学模型。研究表明,随着光电极厚度(d)的增大,开路电压(VOC)下降;短路电流密度(JSC)先迅速增大,后缓慢减小;最大功率输出值MPP则先迅速增大,再迅速减小,表明d对DSSC光电转化效率影响显著。对DSSC的各参数进行了分析,发现操作参数,如光强、温度,对最佳电极厚度的确定没有影响,而物性参数,如光吸收系数、电子扩散系数及电子生命则决定了DSSC光电极厚度的大小。将模型结果与文献实验结果进行了对比,两者符合良好,说明模型结果可靠,可以为DSSC的优化设计提供理论依据。 相似文献
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介绍了新型碳材料在染料敏化太阳电池(DSSCs)中应用的研究进展,在TiO2光电极中加入多层碳纳米管(MWCNTs)不仅能增加电子寿命,提高电池转换效率,还能减少电极裂纹,增加电极的机械强度;用碳纳米粉或碳纳米管替代Pt作为对电极能降低电池制作成本,提高电极的电化学活性,提高电池转换效率,与其他材料复合还能增加电池机械性能和环境的稳定性。综述了材料的制备工艺和MWCNTs加入比例对电池性能的影响及单层碳纳米管(SWCNT)和Ag复合作为对电极的性能。总之,新型碳材料由于其诸多的优点是应用在DSSCs中理想的电极材料。 相似文献
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由于染料敏化太阳电池(简称DSCs)的光电转换效率高、制作的成本较低且工艺较简单等特点,被认为是薄膜太阳电池中最具市场潜力的新型电池之一。固态电解质在染料敏化太阳电池中起着运输载流子、还原染料等实现电池内部循环的作用。由于效率较高的液态电解质具有易泄露和挥发等特点,会影响电池的寿命和稳定性,所以制备性能较好的固态电解质对电池的产业化及实用化有重要意义,也是DSCs电池发展的必然趋势。论述了DSCs电池的基本工作原理及结构组成、发展现状及趋势,并结合相关工作介绍固态电解质对其寿命及稳定性的影响。 相似文献
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Bo-Kun Koo Dong-Yoon Lee Hyun-Ju Kim Won-Jae Lee Jae-Sung Song Hee-Jae Kim 《Journal of Electroceramics》2006,17(1):79-82
Time dependent characteristics of the dye sensitized solar cells (DSSCs) having different counter electrodes were studied.
For this study, three different types of counter electrodes CNT, sputtered platinum and electroplated platinum were used.
Electrochemical impedance spectroscopy was used to study the aging effect of three counter electrode through measuring electrochemical
properties of counter electrode/electrolyte interface as a function of time.
In the case of DSSC with CNT counter electrode, photoelectric conversion efficiency was almost constant. On the other hand,
DSSC with sputtered Pt/electroplated Pt counter electrode, decline in efficiency was observed.
EIS measured that, decline in efficiency of sputtered Pt/electroplated Pt DSSC was due to increase in the series resistance. 相似文献
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染料敏化太阳电池碳对电极研究进展 总被引:1,自引:0,他引:1
作为染料敏化太阳电池(DSCs)对电极Pt催化层的取代材料,低成本、来源广泛的碳材料展现出一定的应用前景。碳对电极组装的DSCs的转换效率已达到9.15%,其值接近Pt对电极DSCs的最高转换效率。主要对碳材料在对电极中的应用类型、涂层工艺以及组装后DSCs的光电性能、稳定性等进行阐述,同时对其存在的问题和发展趋势进行分析。 相似文献
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Dae-Jin Yang Su-Chul Yang Jae-Min Hong Hyunjung Lee Il-Doo Kim 《Journal of Electroceramics》2010,24(3):200-204
For a working electrode in dye-sensitized solar cells (DSSCs), an anatase TiO2 electrode with a hollow hemisphere structure (with diameters of 0.4, 1.5, and 5.0 μm) was fabricated using colloidal templating
and RF-sputtering techniques. The experimental results of a short-circuit current density of 1.96 mA/cm2, an open-circuit voltage of 0.73 V, and a power conversion efficiency (AM 1.5) of 0.67% were obtained with a shell thickness
of 300 nm, a hemisphere diameter of 0.4 μm, and a 100 nm thick blocking layer. The microstructural features, i.e. hemisphere
diameter and shell thickness, played an important role in promoting the charge-collection ability. 相似文献
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采用水热法在FTO导电玻璃基底上,制备了一维有序的TiO_2纳米棒阵列。采用化学浴沉积方法在TiO_2纳米棒有序阵列上沉积Sb_2S_3纳米粒子,形成壳核式Sb_2S_3/TiO_2复合纳米棒阵列结构。通过控制化学浴的沉积时间,可以得到不同厚度Sb_2S_3纳米粒子壳层。通过电子扫描电镜(SEM)、X射线衍射(XRD)、能谱分析(EDS)、以及紫外-可见漫反射吸收光谱(UV-Vis DRS)等对样品形貌、结构组成以及光性能进行了测定和分析。最终基于P3HT/Sb_2S_3(3 h)/TiO_2为光电极所组装的杂化太阳电池能量转换效率最高,获得了1.15%的能量转换效率。 相似文献
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利用直流磁控溅射法在不同氧流量下沉积TiO2薄膜,并制备了染料敏化太阳电池(Dsscs).研究了氧流量对TiO2薄膜晶体结构、表面化学成分和对染料敏化TiO2电极光电性质的影响.发现在锐钛矿和金红石的混合晶型的TiO2薄膜中,对应金红石结构的拉曼谱峰强弱与TiO2电极的开路电压有相同的变化趋势;随着氧流量的增大,TiO2薄膜表明吸附的氧原子减少,这在一定程度上有助于增大染料敏化TiO2电极的短路光电流. 相似文献
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染料敏化太阳电池具有成本廉价、制作工艺简单以及性能稳定的特点,为人类廉价和方便地使用太阳能提供了有效的方法。目前,染料敏化太阳电池的最高转换效率由n-DSSCs保持,利用介孔TiO2纳米晶作电极材料,转换效率达到了12%,但是要进一步提高电池效率遇到了挑战。采用ZnO光阳极和NiO光阴极,分别以N719和C343为光敏剂,研究了组建叠层染料敏化太阳电池的可行性。J-V测试结果表明,从NiO端照射时,pn-DSSCs的开路电压Voc可达694mV,为相应的n-DSSCs和p-DSSCs的开路电压之和。器件的Jsc、FF和h分别为2.73mA/cm2、34.8%、0.66%。研究了电解质中I2与I-相对浓度变化对电池性能和电荷迁移电阻的影响,随着I2/I-浓度比从1∶20增加到1∶1,电池效率从0.71%增加到0.98%。 相似文献
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Jinfen Niu Peixuan Dai Guifang Qi Qian Zhang Binghua Yao Xiaojiao Yu 《Integrated ferroelectrics》2016,176(1):150-159
Using tetrabutyl titanate as the titanium precursor, H3PO4 as the source of phosphorus, P-doped TiO2 nanoparticles HPT were prepared by hydrothermal method. Then P-doped nanotubes ETNT and DTNT were prepared by two-step hydrothermal and calcination method by taking titanate nanotubes (TNT) TiO2 as raw materials. The resulting materials were characterized by XRD, TEM, DRS and N2 adsorption. The photocatalytic degradation of phenol experiments showed that the P-doped nanotubes, especially the DTNT photocatalyst exhibited higher degradation efficiency than the others. Hydroxyl radicals (?OH) have been confirmed to be the active species during the photo-catalytic oxidation reaction. 相似文献