Journal
INORGANIC CHEMISTRY
Volume 53, Issue 15, Pages 8045-8053Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic501041h
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Funding
- National Natural Science Foundation of China [21171044, 21371040]
- National Key Basic Research Program of China (973 Program) [2013CB632900]
- Fundamental Research Funds for the Central Universities [HIT. IBRSEM. A. 201409]
- Program for Innovation Research of Science in Harbin Institute of Technology (PIRS of HIT) [A201416, B201414]
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New near-infrared (NIR)-to-green upconversion nano-particles of Ho3+-Yb3+-F- tridoped TiO2 (UC-F-TiO2) were designed and fabricated via the hydrosol hydrothermal method. Under 980 nm NIR excitation, UC-F-TiO2 emit strong green upconversion fluorescence with three emission bands at 543, 644, and 751 nm and convert the NIR light in situ to the dye-sensitive visible light that could effectively reduce the distance between upconversion materials and sensitizers; thus, they minimize the loss of the converted light. Our results show that this UC-F-TiO2 offers excellent opportunities for the other types of solar cells applications, such as organic solar cells, c-Si solar cells, multijunction solar cells, and so on. When integrating the UC-F-TiO2 into dye-sensitized solar cells (DSSCs), superior total energy conversion efficiency was achieved. Under AM1.5G light, open-circuit voltage reached 0.77 +/- 0.01 V, short-circuit current density reached 21.00 +/- 0.69 mA cm(-2), which resulted in an impressive overall energy conversion efficiency of 9.91 +/- 0.30%, a 37% enhancement compared to DSSCs with pristine TiO2 photoanode.
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