Highly Uniform, Bifunctional Core/Double‐Shell‐Structured β‐NaYF4:Er3+, Yb3+ @ SiO2@TiO2 Hexagonal Sub‐microprisms for High‐Performance Dye Sensitized Solar Cells

Liang, Liangliang; Liu, Yumin; Bu, Chenghao; Guo, Kaimo; Sun, Weiwei; Huang, Niu; Peng, Tao; Sebo, Bobby; Pan, Mengmei; Liu, Wei; Guo, Shishang; Zhao, Xingzhong

doi:10.1002/adma.201204847

Cited by 227 publications

(158 citation statements)

References 43 publications

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“…After the deposition, an annealing step was required to crystallize TiO 2 but the temperature must be controlled to prevent the transformation of upconversion nanoparticles from hexagonal to cubic phase. Besides the UCNPs-TiO 2 photonic crystals, β-NaYF 4 :Er 3+ ,Yb 3+ @SiO 2 @TiO 2 hexagonal submicroprisms and β-NaYF 4 :Yb 3+ ,Er 3+ /SiO 2 /TiO 2 submicroplates were also synthesized by Liang et al [180,181]. Firstly, β-NaYF 4 :Yb 3+ ,Er 3+ plates or prisms were synthesized by hydrothermal treatment.…”

Section: Ucnps-semiconductorsmentioning

confidence: 99%

Upconversion Nanoparticle-Based Nanocomposites

Zhang

2014

Photon Upconversion Nanomaterials

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In recent years, the development of multi-functional nanomaterials with fantastic physical, chemical, and biological properties has become an attractive research topic, demonstrating high potential in biomedicine, catalysis, energy conversion, water treatment adsorbents, and so on. As one of the most important luminescence nanomaterials, upconversion nanoparticles (UCNPs) were also used to fabricate multi-functional nanocomposites (UCNPs-X). In this chapter, we summarize recent advanced upconversion nanoparticles-based nanocomposites, including UCNPs-mSiO 2 (mSiO 2 = mesoporous SiO 2 ), UCNPs-MNPs (MNPs = magnetic nanoparticles), UCNPs-metal, and UCNPs-semiconductor nanocomposites.

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Section: Ucnps-semiconductorsmentioning

confidence: 99%

Upconversion Nanoparticle-Based Nanocomposites

Zhang

2014

Photon Upconversion Nanomaterials

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“…For example, Y and Nd have been shown to both enhance [35,37] and decrease [19,36] the efficiency in different reports. Another type of material involves upconverting [38][39][40][41][42][43][44], downconverting [25,40,[45][46][47][48][49][50], or dual-mode [51] luminescent rare earth nanostructures, which allow improved light collection efficiency when incorporated into the TiO 2 photoanode in DSSCs. They can also help improve efficiency through light scattering [39,43,50,52], altering the energy level of the TiO 2 [43,48,53], or by reducing recombination processes [47,54,55] at the TiO 2 /electrolyte interface.…”

Section: Introductionmentioning

confidence: 99%

Increased efficiency of dye-sensitized solar cells by addition of rare earth oxide microparticles into a titania acceptor

Luitel

Fernando

Tatum

et al. 2016

Electrochimica Acta

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Please cite this article as: Tulashi Luitel, Kasun Fernando, Brandon S.Tatum, Bruce W.Alphenaar, Francis P.Zamborini, Increased efficiency of dye-sensitized solar cells by addition of rare earth oxide microparticles into a titania acceptor, Electrochimica Acta http://dx. GRAPHICAL Abstract ABSTRACTThe addition of 400 micron scale rare-earth metal oxide particles to the TiO 2 nanoparticle acceptor layer of a dye-sensitized solar cell (DSSC) dramatically increases the efficiency of the solar cell by 10-30%. Oxidized neodymium powder, Nd 2 O 3 , combined with TiO 2 nanoparticles forms a composite photoanode containing a wide range of Nd 2 O 3 particle sizes. Based on absorbance measurements, the dye-uptake on the Nd 2 O 3 /TiO 2 anode increases substantially compared to both a standard anode and to one made from a mixture of large and small TiO 2 particles. Electrochemical impedance spectroscopy (EIS) shows a similar electron lifetime, but increased electron transport diffusion coefficient through the Nd 2 O 3 /TiO 2 composite as compared to TiO 2 only. This shows that the Nd 2 O 3 /TiO 2 composite has a lower internal resistance for charge transport. This decrease in resistance, possibly due to the filling of trap states by the Nd 2 O 3 valence or f-states, and increased dye uptake results in improved efficiency by simple incorporation of Nd 2 O 3 powder.

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“…Xiong et al used TiO 2 nanoparticles (NPs) as cathode buffer layer to improve the efficiency and stability of inverted OSCs [12]. In addition, some functional materials were doped into TiO 2 buffer layer, such as metal NPs and some rare earth ions [13][14][15][16][17][18][19][20]. NaYF 4 :Yb 3+ ,Er 3+ NPs had been doped into active layer of solar cell and demonstrated a good effect for the performance improvement of OSCs especially the enhancement of short-circuit current density (J sc ) [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%