TiO2：Ho^3＋纳米线下转换光阳极的制备及其光电性能

采用水热法制备Ti O2纳米线前驱体,将其浸入Ho（NO3）3水溶液并取出煅烧,得到TiO2：Ho^3＋下转换纳米线,用其制备染料敏化太阳能电池的光阳极,探讨其光电性能。用扫描电镜和X射线衍射分别表征TiO2：Ho^3＋纳米线的形貌和结构。荧光光谱和紫外-可见吸收光谱显示TiO2：Ho^3＋下转换纳米线可以将近紫外光和中紫外光转化为可以被N719染料吸收的可见光。与纯Ti O2纳米线作为光阳极的电池相比,以TiO2：Ho^3＋下转换纳米线作为光阳极的电池有较好的光电转换效率,且当Ho3＋掺杂量为4%时（质量分数）,电池效率提高了一倍。TiO2：Ho^3＋下转换纳米线拓宽光谱响应范围至近紫外光和...

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Published in中国有色金属学报：英文版 Vol. 25; no. 12; pp. 3974 - 3979
Main Author 李月英 郝洪顺 王丽君 郭伟华 苏青 秦磊 高文元 刘贵山 胡志强
Format Journal Article
LanguageEnglish
Published 2015
Subjects
TiO2：Ho^3＋纳米线
下转换荧光
光伏性能
染料敏化太阳能电池
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ISSN1003-6326

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Summary:采用水热法制备Ti O2纳米线前驱体,将其浸入Ho（NO3）3水溶液并取出煅烧,得到TiO2：Ho^3＋下转换纳米线,用其制备染料敏化太阳能电池的光阳极,探讨其光电性能。用扫描电镜和X射线衍射分别表征TiO2：Ho^3＋纳米线的形貌和结构。荧光光谱和紫外-可见吸收光谱显示TiO2：Ho^3＋下转换纳米线可以将近紫外光和中紫外光转化为可以被N719染料吸收的可见光。与纯Ti O2纳米线作为光阳极的电池相比,以TiO2：Ho^3＋下转换纳米线作为光阳极的电池有较好的光电转换效率,且当Ho3＋掺杂量为4%时（质量分数）,电池效率提高了一倍。TiO2：Ho^3＋下转换纳米线拓宽光谱响应范围至近紫外光和中紫外光区,提高了电池的短路电流密度,从而电池效率提高。
Bibliography:43-1239/TG
Yue-ying LI,Hong-shun HAO,Li-jun WANG,Wei-hua GUO,Qing SU,Lei QIN,Wen-yuan GAO,Gui-shan LIU,Zhi-qiang HU （1.Department of Inorganic Nonmetallic Materials Engineering, Dalian Polytechnic University, Dalian 116034, China, 2. Liaoning Provincial College Key Laboratory of New Materials and Material Modification, Dalian Polytechnic University, Dalian 116034, China, 3. National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, China）
Ho^3＋-doped titanium dioxide（TiO2：Ho^3＋） downconversion（DC） nanowires were synthesized through a simple hydrothermal method followed by a subsequent calcination process after being immersed in Ho（NO3）3 aqueous solution. Moreover, TiO2：Ho^3＋ nanowires（HTNWs） were used as the photoanode in dye-sensitized solar cells（DSSCs） to investigate their photoelectric properties. Scanning electron microscopy（SEM） and X-ray diffraction（XRD） were used to characterize the morphology and structure of the material, respectively. The photofluorescence and ultraviolet-visible absorption spectra of HTNWs reveal a DC from the near and middle ultraviolet light to visible light which matches the strong absorbed region of the N719 dye. Compared with the pure TNW photoanode, HTNWs DC photoanodes show greater photovoltaic efficiency. The photovoltaic conversion efficiency（η） of the DSSCs with HTNWs photoanode doped with 4% Ho2O3（mass fraction） is two times that with pure TNW photoanode. This enhancement could be attributed to HTNWs which could extend the spectral response range of DSSCs to the near and middle ultraviolet region and increase the short-circuit current density（Jsc） of DSSCs, thus leading to the enhancement of photovoltaic conversion efficiency.
Ho3＋-doped titanium dioxide nanowire; downconversion fluorescence; dye-sensitized solar cells; photovoltaic performance
ISSN:1003-6326