Abstract
We show that a high-efficiency diffraction grating can be embedded into nanoparticulate TiO 2 film via imprinting combined with TiCl 4 treatment. The grating-embedded film consists of two layers in intimate contact. A thin TiO 2 layer was first patterned on a glass substrate by imprinting. The patterned layer was TiCl 4 -treated with a higher concentration than the over-coated thicker layer, so that it diffracts incident light as a refractive-index grating. Gratings with a period scaled down to 1 µm could be embedded into the film. Diffraction efficiency increased with an increasing grating height and an efficiency over 80% was achieved in the near-ultraviolet and visible range. Dye-sensitized solar cells fabricated using a grating-embedded TiO 2 photoanode exhibited much better photovoltaic performance than those without a grating. It was also found that the incorporation of a diffraction grating greatly enhances the photocatalytic activity of nanoparticulate TiO 2 film. All these are attributed to improved light harvest.
| Original language | English |
|---|---|
| Article number | 737 |
| Journal | Applied Physics A: Materials Science and Processing |
| Volume | 123 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2017 Dec 1 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Materials Science(all)
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Improved light harvest in diffraction grating-embedded TiO 2 nanoparticle film . / Lee, Jeeyoung; Lee, Myeongkyu.
In: Applied Physics A: Materials Science and Processing, Vol. 123, No. 12, 737, 01.12.2017.Research output: Contribution to journal › Article
TY - JOUR
T1 - Improved light harvest in diffraction grating-embedded TiO 2 nanoparticle film
AU - Lee, Jeeyoung
AU - Lee, Myeongkyu
PY - 2017/12/1
Y1 - 2017/12/1
N2 - We show that a high-efficiency diffraction grating can be embedded into nanoparticulate TiO 2 film via imprinting combined with TiCl 4 treatment. The grating-embedded film consists of two layers in intimate contact. A thin TiO 2 layer was first patterned on a glass substrate by imprinting. The patterned layer was TiCl 4 -treated with a higher concentration than the over-coated thicker layer, so that it diffracts incident light as a refractive-index grating. Gratings with a period scaled down to 1 µm could be embedded into the film. Diffraction efficiency increased with an increasing grating height and an efficiency over 80% was achieved in the near-ultraviolet and visible range. Dye-sensitized solar cells fabricated using a grating-embedded TiO 2 photoanode exhibited much better photovoltaic performance than those without a grating. It was also found that the incorporation of a diffraction grating greatly enhances the photocatalytic activity of nanoparticulate TiO 2 film. All these are attributed to improved light harvest.
AB - We show that a high-efficiency diffraction grating can be embedded into nanoparticulate TiO 2 film via imprinting combined with TiCl 4 treatment. The grating-embedded film consists of two layers in intimate contact. A thin TiO 2 layer was first patterned on a glass substrate by imprinting. The patterned layer was TiCl 4 -treated with a higher concentration than the over-coated thicker layer, so that it diffracts incident light as a refractive-index grating. Gratings with a period scaled down to 1 µm could be embedded into the film. Diffraction efficiency increased with an increasing grating height and an efficiency over 80% was achieved in the near-ultraviolet and visible range. Dye-sensitized solar cells fabricated using a grating-embedded TiO 2 photoanode exhibited much better photovoltaic performance than those without a grating. It was also found that the incorporation of a diffraction grating greatly enhances the photocatalytic activity of nanoparticulate TiO 2 film. All these are attributed to improved light harvest.
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U2 - 10.1007/s00339-017-1368-5
DO - 10.1007/s00339-017-1368-5
M3 - Article
AN - SCOPUS:85033484133
VL - 123
JO - Applied Physics
JF - Applied Physics
SN - 0340-3793
IS - 12
M1 - 737
ER -