A method to enhance near-infrared quantum tailoring using silver nanopillar array structures
A technology of quantum tailoring and structural enhancement, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, and can solve the problem of low luminous efficiency and low spectral line intensity of near-infrared quantum tailoring materials, which limit the light emission of solar cells. Converter sheet application prospects and other issues, to achieve the effect of improving photoelectric conversion efficiency, simple preparation process, suitable for promotion
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[0042] The preparation method of the silver nanocolumn array structure is specifically:
[0043] Step S11: soak the anodized aluminum template (AAO) prepared by the two-step anodic oxidation method in 1M sodium hydroxide solution, and perform pore expansion treatment.
[0044] Step S12: using the AAO template obtained in step S11 to grow silver nanocolumn arrays in the pores by electroless deposition. In a 50 ml polytetrafluoroethylene-lined autoclave, AAO templates with different pore sizes were soaked in 15 ml of 1M silver nitrate solution and reacted at 60 °C for 12 h to obtain large-area, highly ordered, and controllable gaps. Silver nanocolumn array (the gap size of the silver nanocolumn array is 40nm, 25nm and 10nm respectively).
[0045] The specific preparation process of the AAO template in step S11 is:
[0046] (1) Annealing
[0047] Put the high-purity aluminum foil (99.99%) in a tube furnace and anneal at 450~550℃ for 3~4h under the protection of nitrogen to rem...
Embodiment 1
[0071] (1) Soak the AAO template prepared by the two-step anodic oxidation method in 1M sodium hydroxide solution, and perform hole expansion treatment. The hole expansion treatment time is 20s, and the AAO template with a pore diameter of 60nm and a pore wall thickness of 40nm is obtained. ,Such as figure 2 As shown in (a) figure;
[0072] (2) Place the expanded AAO template in a 50 ml polytetrafluoroethylene-lined autoclave, add 15 ml of 1M silver nitrate solution, and react at 60°C for 12 hours to obtain two adjacent gaps with a size of 40 nm. Silver nanopillar arrays, such as image 3 As shown in (a) figure;
[0073] (3) Spin-coat 100 μl of NaYF 4 :2%Pr 3+ The nanoparticles were spin-coated into the silver nanocolumn array structure with a gap size of 40nm, the spin-coating speed was 2000 r.p.m, and the spin-coating time was 1min;
[0074] (4) Measurement of NaYF 4 :2%Pr 3+ Near-infrared quantum-tailored luminescence spectra of nanoparticles spin-coated on silver n...
Embodiment 2
[0076] (1) The AAO template prepared by the two-step anodic oxidation method was soaked in 1M sodium hydroxide solution, and the pore expansion treatment was performed. The pore expansion treatment time was 35s, and the AAO template with a pore diameter of 75nm and a pore wall thickness of 25nm was obtained. ,Such as figure 2 As shown in (b) figure;
[0077] (2) Place the expanded AAO template in a 50 ml polytetrafluoroethylene-lined autoclave, add 15 ml of 1M silver nitrate solution, and react at 60°C for 12 hours to obtain two adjacent gaps with a size of 25 nm. Silver nanopillar arrays, such as image 3 As shown in (b) figure;
[0078] (3) Spin-coat 100 μl of NaYF 4 :2%Pr 3+ The nanoparticles were spin-coated into the silver nanopillar array structure with a gap size of 25nm, the spin-coating speed was 2000 r.p.m, and the spin-coating time was 1min;
[0079] (4) Measurement of NaYF 4 :2%Pr 3+ Near-infrared quantum-tailored luminescence spectra of nanoparticles spin-...
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