采用水热法制备硼硫(B/S)共掺杂纳米二氧化钛(B-S-TiO_2),并配制成浆料,利用丝网印刷技术在FTO导电玻璃上制备B-S-TiO_2薄膜;用化学浴沉积(CBD)法制备了CdS量子点敏化B-S-TiO_2薄膜电极,并用X射线衍射(XRD)、电子显微镜(TEM)、元素分析...采用水热法制备硼硫(B/S)共掺杂纳米二氧化钛(B-S-TiO_2),并配制成浆料,利用丝网印刷技术在FTO导电玻璃上制备B-S-TiO_2薄膜;用化学浴沉积(CBD)法制备了CdS量子点敏化B-S-TiO_2薄膜电极,并用X射线衍射(XRD)、电子显微镜(TEM)、元素分析能谱(EDS)和紫外–可见光谱对其进行表征分析;结果显示:B/S共掺杂不会改变TiO_2的晶型,掺杂后的TiO_2吸收边带发生明显红移,吸收强度显著增强;同样用化学浴沉积的方法制备Ni S工作电极,用改性的聚硫化物((CH3)4N)2S/((CH3)4N)2Sn)电解液,组装CdS量子点敏化硼硫(B/S)共掺杂纳米二氧化钛(B-S-TiO_2)太阳能电池,并测试电池光电性能。测试结果表明,在AM1.5G的照射下,电池的能量转化效率(η)由3.21%增大到3.69%,提高了14.9%,电池获得高达(Voc)1.218 V的开路电压和3.42 m A/cm2的短路光电流(Jsc),以及高达88.7%的填充因子(ff)。展开更多
As one of the most promising candidates for the third generation solar cells,quantum dots sensitized solar cells(QDSCs) have been comprehensively studied.In this work,we synthesize the CdSe QDs with the absorption ran...As one of the most promising candidates for the third generation solar cells,quantum dots sensitized solar cells(QDSCs) have been comprehensively studied.In this work,we synthesize the CdSe QDs with the absorption range from 450-550 nm,which are suitable to be applied in the QDSCs.Then,we found that the self-assembly(SA) deposition method is superior to the successive ionic layer adsorption and reaction(SILAR) deposition method in the fabrication of the photo anodes.Furthermore,the influence of TiO_2's thickness of the photo anodes to the QDSCs' efficiency has been studied.With the optimized CdSe QDs sensitized photo anodes,the efficiency of the QDSCs can reach 3.38%in this work.展开更多
铜锌锡硫(CZTS)半导体常作为对电极材料被应用于量子点敏化太阳能电池(QDSCs)中,然而效率一直低于4%。本文采用热注入法合成出纳米尺寸的CZTS并制成对电极(CZTS/FTO),用其组装的Cd Se QDSCs和Cd Se Te QDSCs的效率(PCE)分别达到了5.75%...铜锌锡硫(CZTS)半导体常作为对电极材料被应用于量子点敏化太阳能电池(QDSCs)中,然而效率一直低于4%。本文采用热注入法合成出纳米尺寸的CZTS并制成对电极(CZTS/FTO),用其组装的Cd Se QDSCs和Cd Se Te QDSCs的效率(PCE)分别达到了5.75%和7.64%。电化学阻抗谱、塔菲尔极化等表征证明电池效率的提高与CZTS良好的导电性及催化活性联系密切。展开更多
Recently, semiconductor quantum dot (QD) sensitized solar cells (QDSSCs) are expected to achieve higher conversion efficiency because of the large light absorption coefficient and multiple exciton generation in QDs. T...Recently, semiconductor quantum dot (QD) sensitized solar cells (QDSSCs) are expected to achieve higher conversion efficiency because of the large light absorption coefficient and multiple exciton generation in QDs. The morphology of TiO2 electrode is one of the most important factors in QDSSCs. Inverse opal (IO) TiO2 electrode, which has periodic mesoporous structure, is useful for QDSSCs because of better penetration of electrolyte than conventional nanoparticulate TiO2 electrode. In addition, the ordered three dimensional structure of IO-TiO2 would be better for electron transport. We have found that open circuit voltage Voc of QDSSCs with IO-TiO2 electrodes was much higher (0.2 V) than that with nanoparticulate TiO2 electrodes. But short circuit current density Jsc was lower in the case of IO-TiO2 electrodes because of the smaller surface area of IO-TiO2. In this study, for increasing surface area of IO-TiO2, we applied TiCl4 post treatment on IO-TiO2 and investigated the effect of the post treatment on photovoltaic properties of CdSe QD sensitized IO-TiO2 solar cells. It was found that Jsc could be enhanced due to TiCl4 post treatment, but decreased again for more than one cycle treatment, which indicates excess post treatment may lead to worse penetration of electrolyte. Our results indicate that the appropriate post treatment can improve the energy conversion efficiency of the QDSSCs.展开更多
采用恒电位电沉积法在FTO(fluorine-doped tin oxide)导电玻璃表面依次沉积CoS和CuS,形成FTO/CoS/CuS复合对电极,并用于量子点敏化太阳能电池。确定了电沉积电位和电沉积时间,并考察了电沉积温度对电极形貌及电催化活性的影响。采用SEM...采用恒电位电沉积法在FTO(fluorine-doped tin oxide)导电玻璃表面依次沉积CoS和CuS,形成FTO/CoS/CuS复合对电极,并用于量子点敏化太阳能电池。确定了电沉积电位和电沉积时间,并考察了电沉积温度对电极形貌及电催化活性的影响。采用SEM和TEM对电极的表面形貌和微观结构进行表征;采用紫外可见分光光度计对电极的光反射性能进行测试;通过测试交流阻抗、Tafel极化曲线、J-V曲线及IPCE谱图对电极的电化学性能进行表征。结果表明,FTO/CoS/CuS对电极具有更高的光反射率及电催化活性。与Au片、FTO/CoS和FTO/CuS对电极相比,光电转化效率分别提高了118.3%、48.8%、26.8%。展开更多
基金This work was supported by National Science Foundation of China （No. 51402085）, Key Natural Science Foun- dation of Tianjin （No. 12JCZDJC27500）, Research Program of Application Foundation of Qinghai Province （No. 2013-Z-701 No. 2013-Z-901） and the ministry of education Chuihui projects （Z2012110）.
文摘采用水热法制备硼硫(B/S)共掺杂纳米二氧化钛(B-S-TiO_2),并配制成浆料,利用丝网印刷技术在FTO导电玻璃上制备B-S-TiO_2薄膜;用化学浴沉积(CBD)法制备了CdS量子点敏化B-S-TiO_2薄膜电极,并用X射线衍射(XRD)、电子显微镜(TEM)、元素分析能谱(EDS)和紫外–可见光谱对其进行表征分析;结果显示:B/S共掺杂不会改变TiO_2的晶型,掺杂后的TiO_2吸收边带发生明显红移,吸收强度显著增强;同样用化学浴沉积的方法制备Ni S工作电极,用改性的聚硫化物((CH3)4N)2S/((CH3)4N)2Sn)电解液,组装CdS量子点敏化硼硫(B/S)共掺杂纳米二氧化钛(B-S-TiO_2)太阳能电池,并测试电池光电性能。测试结果表明,在AM1.5G的照射下,电池的能量转化效率(η)由3.21%增大到3.69%,提高了14.9%,电池获得高达(Voc)1.218 V的开路电压和3.42 m A/cm2的短路光电流(Jsc),以及高达88.7%的填充因子(ff)。
文摘As one of the most promising candidates for the third generation solar cells,quantum dots sensitized solar cells(QDSCs) have been comprehensively studied.In this work,we synthesize the CdSe QDs with the absorption range from 450-550 nm,which are suitable to be applied in the QDSCs.Then,we found that the self-assembly(SA) deposition method is superior to the successive ionic layer adsorption and reaction(SILAR) deposition method in the fabrication of the photo anodes.Furthermore,the influence of TiO_2's thickness of the photo anodes to the QDSCs' efficiency has been studied.With the optimized CdSe QDs sensitized photo anodes,the efficiency of the QDSCs can reach 3.38%in this work.
文摘铜锌锡硫(CZTS)半导体常作为对电极材料被应用于量子点敏化太阳能电池(QDSCs)中,然而效率一直低于4%。本文采用热注入法合成出纳米尺寸的CZTS并制成对电极(CZTS/FTO),用其组装的Cd Se QDSCs和Cd Se Te QDSCs的效率(PCE)分别达到了5.75%和7.64%。电化学阻抗谱、塔菲尔极化等表征证明电池效率的提高与CZTS良好的导电性及催化活性联系密切。
文摘Recently, semiconductor quantum dot (QD) sensitized solar cells (QDSSCs) are expected to achieve higher conversion efficiency because of the large light absorption coefficient and multiple exciton generation in QDs. The morphology of TiO2 electrode is one of the most important factors in QDSSCs. Inverse opal (IO) TiO2 electrode, which has periodic mesoporous structure, is useful for QDSSCs because of better penetration of electrolyte than conventional nanoparticulate TiO2 electrode. In addition, the ordered three dimensional structure of IO-TiO2 would be better for electron transport. We have found that open circuit voltage Voc of QDSSCs with IO-TiO2 electrodes was much higher (0.2 V) than that with nanoparticulate TiO2 electrodes. But short circuit current density Jsc was lower in the case of IO-TiO2 electrodes because of the smaller surface area of IO-TiO2. In this study, for increasing surface area of IO-TiO2, we applied TiCl4 post treatment on IO-TiO2 and investigated the effect of the post treatment on photovoltaic properties of CdSe QD sensitized IO-TiO2 solar cells. It was found that Jsc could be enhanced due to TiCl4 post treatment, but decreased again for more than one cycle treatment, which indicates excess post treatment may lead to worse penetration of electrolyte. Our results indicate that the appropriate post treatment can improve the energy conversion efficiency of the QDSSCs.
文摘采用恒电位电沉积法在FTO(fluorine-doped tin oxide)导电玻璃表面依次沉积CoS和CuS,形成FTO/CoS/CuS复合对电极,并用于量子点敏化太阳能电池。确定了电沉积电位和电沉积时间,并考察了电沉积温度对电极形貌及电催化活性的影响。采用SEM和TEM对电极的表面形貌和微观结构进行表征;采用紫外可见分光光度计对电极的光反射性能进行测试;通过测试交流阻抗、Tafel极化曲线、J-V曲线及IPCE谱图对电极的电化学性能进行表征。结果表明,FTO/CoS/CuS对电极具有更高的光反射率及电催化活性。与Au片、FTO/CoS和FTO/CuS对电极相比,光电转化效率分别提高了118.3%、48.8%、26.8%。
