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将电沉积法和化学浴沉积法结合,分别将CdTe和CdS量子点纳米晶材料引入到TiO_2纳米管阵列上制备CdTe/CdS量子点共敏化TiO_2光电极。利用扫描电镜、X射线衍射和X射线能量色散光谱等测试手段对所得样品的形貌、晶型和组分进行表征。在模拟太阳光照射条件下,通过电化学工作站测试其光电化学性能。研究结果表明,相对于单一量子点敏化CdS/TiO_2和CdTe/TiO_2光电极而言,共敏化CdTe/CdS/TiO_2光电极表现出更好的光电转化性能,短路电流密度和光电转换效率分别可以达到3.1 m A·cm~(-2)和1.85%。此外,采用电化学阻抗测试技术对材料性能提升的原因进行深入的探究。  相似文献   
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为了拓宽染料敏化太阳电池对太阳光谱的响应范围,提高电池的光电转换效率,将两种含有不同受体结构(绕丹宁-3-乙酸基(RA)和氰基丙烯酸基(CA))的三苯胺染料(TR1和TC1)进行共敏化。TR1染料平伏吸附在TiO2表面,而TC1染料直立吸附在TiO2表面。将两种染料按照不同摩尔比共敏化TiO2后,TC1占据TR1的部分位置,拓展光谱的同时也抑制了电荷复合,电子寿命较TR1敏化的太阳电池长。在TR1与TC1摩尔比为5:5的共敏剂溶液敏化的共敏电池器件中,短路光电流密度(Jsc)为11.7 mA/cm2,开路电压(Voc)为704 mV,填充因子(FF)为0.73,光电转换效率(η)为6.03%。该结果明显优于单一染料敏化的电池器件。  相似文献   
3.
在染料敏化太阳电池中,染料敏化剂分成无机染料与有机染料两大类。无机染料受稀有金属钌的制约而成本较高,开发有机染料是降低染料敏化太阳电池成本的有效手段,成为目前研究的热点。本文从有机染料敏化剂的分子设计入手,简述了染料敏化太阳电池中有机染料敏化剂的基本结构,将有机染料敏化剂分为吲哚啉类染料、香豆素类染料、三苯胺类染料、菁...  相似文献   
4.
将电沉积法和化学浴沉积法结合,分别将CdTe和CdS量子点纳米晶材料引入到TiO2纳米管阵列上制备CdTe/CdS量子点共敏化TiO2光电极。利用扫描电镜、X射线衍射和X射线能量色散光谱等测试手段对所得样品的形貌、晶型和组分进行表征。在模拟太阳光照射条件下,通过电化学工作站测试其光电化学性能。研究结果表明,相对于单一量子点敏化CdS/TiO2和CdTe/TiO2光电极而言,共敏化CdTe/CdS/TiO2光电极表现出更好的光电转化性能,短路电流密度和光电转换效率分别可以达到3.1 mA·cm-2和1.85%。此外,采用电化学阻抗测试技术对材料性能提升的原因进行深入的探究。  相似文献   
5.
采用曙红与香豆素混合的方法,配制成敏化剂修饰纳米晶薄膜.实验结果证明,这种共敏化的方法可以在可见光范围内有效提高电池的吸光度,使得电池的性能比单独使用曙红敏化有了大幅度提高.在模拟太阳光下,曙红与香豆素共敏化的电池的开路电压达到了532 mV,短路电流达到了0.1125 mA/cm2.  相似文献   
6.
A novel class of dyes, namely benzoporphyrins, was synthesized and implemented into dye‐sensitized solar cells. They feature complementary absorptions compared to N719 , which renders them promising candidates for co‐sensitization in DSSCs. Notably, metallated benzoporphyrins reveal a TiO2–nanoparticle attachment that is size and aggregation dependent. Therefore, unproductive energy‐transfer events between the selectively attached dyes can be prevented. In light of the latter, an efficiency improvement of 39 % has been achieved upon selective adsorption of benzoporphyrins and N719 onto different layers of TiO2 photoelectrode.  相似文献   
7.
This work presents theoretical modeling of some systems, using density functional theory (DFT), for enhancing the photoresponse of a dye-sensitized solar cell. The optimization of the dye (NKX 2587) as well as the dye derivatives was carried out using B3LYP and 6-311g (d,p) level of theory, using DFT as incorporated in Gaussian 03 level of programming. The HOMO–LUMO energy gaps are lower for (CdSe)13-Dye-(TiO2)6 multijunction systems in comparison with both the isolated dyes as well as dye-TiO2 systems. The absorption peaks were found to be mostly red-shifted for (CdSe)13-Dye-(TiO2)6 multijunction systems with respect to the Dye-TiO2 systems, indicating the enhancement of the absorption behavior of the dye sensitizer by its interaction with the CdSe framework. The results thus indicate some sort of co-sensitization of the TiO2 by the dye sensitizer as well as the CdSe quantum dot and are hence expected to increase the efficiency of the solar device. © 2019 Wiley Periodicals, Inc.  相似文献   
8.
Giant power conversion efficiency is achieved by using bifunction ZrO2 : Er3+/Yb3+assisted co-sensitised dye-sensitized solar cells. The evolution of the crystalline structure and its microstructure are examined by X-ray diffraction, scanning electron microscopy studies. The bi-functional behaviour of ZrO2 : Er3+/Yb3+ as upconversion, light scattering is confirmed by emission and diffused reflectance studies. The bi-function ZrO2 : Er3+/Yb3+ (pH=3) assisted photoanode is co-sensitized by use of N719 dye, squaraine SPSQ2 dye and is sandwiched with Platinum based counter electrode. The fabricated DSSC exhibited a giant power conversion efficiency of 12.35 % with VOC of 0.71 V, JSC of 27.06 mA/cm2, FF of 0.63. The results, which motivated the development of a small DSSC module, gave 6.21 % and is used to drive a tiny electronic motor in indoor and outdoor lighting conditions. Small-area DSSCs connected in series have found that a VOC of 4.52 V is sufficient to power up Internet of Things (IoT) devices.  相似文献   
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