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Beilstein J. Nanotechnol. 2018, 9, 2788–2793, doi:10.3762/bjnano.9.260
Figure 1: (a) FE-SEM morphologies of NaYF4:Yb3+/Er3+ as a function of the reaction time (2, 3, 5 and 12 h). A...
Figure 2: (a) Photoluminescence spectra of NaYF4:Yb3+/Er3+ samples under 980 nm laser illumination with a pow...
Figure 3: (a) FE-SEM images showing the multiple layers of a-Si:H solar cell; (b) current–voltage and (c) EQE...
Figure 4: (a) Current–voltage curves and (b) EQE curves of an a-Si:H solar cell with an UC layer compared wit...