Novel double-layered photoanodes based on porous-hollow TiO2 microspheres and La(OH)3:Yb3+/Er3+ for highly efficient dye-sensitized solar cells

  • Zhen Hu
  • Li ZhaoEmail author
  • Haiyong Guo
  • Shimin WangEmail author
  • Wenlu Li
  • Xiaojie Yang
  • Binghai Dong
  • Li Wan


A novel composite double-layer film was developed using TiO2/La(OH)3:Yb3+/Er3+ nanoparticles (P25/UC) and porous-hollow TiO2 microspheres (PHTS) for highly efficient dye-sensitized solar cells (DSSCs). P25/UC was used as the first layer and coated onto fluorine-doped tin oxide glass substrate to create a good contact and upconversion effect. The P25/UC layer can absorb and convert infrared light into visible red and green light, increasing light utilization. PHTS has a large size and a high specific surface area, was deposited onto the surface of the P25/UC film to improve the light scattering performance and dye adsorption of solar cells. The P25/UC composite double-layer film (P25/UC + PHTS) achieved the highest short-circuit current density of 20.33 mA/cm2 and photoelectron conversion efficiency of 8.89% due to the synergistic effect of the upconversion layers and light-scattering layers, which increased by 51.26% and 38.04% compared with that of the pure P25 film photoelectrode.



This work was supported by the National Natural Science Foundation of China (51572072), (5170021087) and China Postdoctoral Science Foundation (2017M622384).


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Authors and Affiliations

  1. 1.Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Key Laboratory for the Green Preparation and Application of Functional Materials, Ministry of Education, Faculty of Materials Science and EngineeringHubei UniversityWuhanPeople’s Republic of China

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