无机材料学报 ›› 2019, Vol. 34 ›› Issue (6): 590-598.DOI: 10.15541/jim20180406

• 研究论文 • 上一篇    下一篇

Nb2O5包覆对TiO2纳米阵列/上转换发光复合结构柔性染料敏化太阳能电池性能的影响

吕喜庆,张环宇,李瑞,张梅,郭敏()   

  1. 北京科技大学 冶金与生态工程学院, 北京 100083
  • 收稿日期:2018-09-06 修回日期:2018-11-13 出版日期:2019-06-20 网络出版日期:2019-05-23
  • 作者简介:吕喜庆(1994-), 男, 硕士研究生. E-mail:xiqinglv@163.com
  • 基金资助:
    国家自然科学基金(51572020);国家自然科学基金(51772023);国家重点基础研究发展规划 973计划(2014CB643401)

Nb2O5 Coating on the Performance of Flexible Dye Sensitized Solar Cell Based on TiO2 Nanoarrays/Upconversion Luminescence Composite Structure

Xi-Qing LÜ,Huan-Yu ZHANG,Rui LI,Mei ZHANG,Min GUO()   

  1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2018-09-06 Revised:2018-11-13 Published:2019-06-20 Online:2019-05-23
  • Supported by:
    National Natural Science Foundation of China(51572020);National Natural Science Foundation of China(51772023);National Program on Key Basic Research Project(2014CB643401)

摘要:

采用水热法与旋涂法, 成功制备出基于钛网基底的TiO2纳米线阵列/Yb-Er-F掺杂TiO2上转换发光纳米粒子(TNWAs/YEF-TiO2-UCNPs)复合结构光阳极, 并将其组装成柔性染料敏化太阳能电池(DSSC)。探讨了Yb-Er-F掺杂TiO2上转换发光纳米粒子的光学性能对复合结构DSSC光电转换性能的影响, 在此基础上系统研究了不同NbCl5浓度包覆对复合结构形貌和DSSCs性能的影响。结果表明:Yb-Er-F掺杂TiO2上转换发光纳米粒子的引入可以增大光阳极的入射光利用范围, 但同时也会增加其内部的电子复合。通过Nb2O5纳米粒子层的包覆可以在半导体/电解液界面形成能量势垒, 增加复合阻抗Rrec, 抑制电子复合; 提高电子收集效率ηec和光生电子寿命τe, 进一步增大短路电流和开路电位, 最终提高电池的光电转换效率。采用20 mmol/L的NbCl5乙醇溶液旋涂制备的Nb2O5@TNWAs/YEF-TiO2-UCNPs复合结构柔性DSSC获得了最佳的光电转换效率(6.89%), 比未经包覆的TNWAs/YEF-TiO2-UCNPs复合结构提升了24.3%。

关键词: Nb2O5包覆, Yb-Er-F掺杂TiO2, 上转换发光纳米粒子, 复合结构, 柔性染料敏化太阳能电池

Abstract:

By using hydrothermal and spin-coating method, Ti mesh supported composite structure, TiO2 nanowire arrays/Yb-Er-F doped TiO2 upconversion luminescence nanoparticles (TNWAs/YEF-TiO2-UCNPs), was synthesized and assembled into flexible dye-sensitized solar cell (DSSC). The effect of YEF-TiO2-UCNPs optical property on the power conversion efficiency (PCE) of this device was studied. In addition, the influence of NbCl5 solution coating on morphology and performance of flexible DSSC was also investigated in detail. It is shown that the YEF-TiO2- UCNPs could expand the range of incident light utilization, in the meantime, however, increase the electron recombination in photoanode. Nb2O5 coating layer served as an energy barrier at the semiconductor/electrolyte interface, increased the composite resistance Rrec to inhibit electron recombination, improved the electron collection efficiency ηec and photogenerated electron lifetime τe, then elevated the short circuit current and the open circuit voltage, finally enhanced the performance of DSSC. The Nb2O5@TNWAs/YEF-TiO2-UCNPs composite structured DSSC achieved the best PCE of 6.89% with 20 mmol/L NbCl5 ethanol solution coating, increased 24.3% compared with the uncoated blank device.

Key words: Nb2O5 coating, Yb-Er-F doped TiO2, upconversion luminescence nanoparticle, composite structure, flexible dye sensitized solar cells

中图分类号: