The Pros And Cons Of Solar Cells

1095 Words5 Pages
Near infrared (NIR) light has attracted much attention owing to its widespread applications in energy conversion, (-- removed HTML --) (-- removed HTML --) 1–3 (-- removed HTML --) (-- removed HTML --) sensing, (-- removed HTML --) (-- removed HTML --) 4 (-- removed HTML --) (-- removed HTML --) and bio-therapy. (-- removed HTML --) (-- removed HTML --) 5–7 (-- removed HTML --) (-- removed HTML --) In particular, to solve the energy problem all over the world, efficient utilization of natural energy is strongly required. Si solar cells (SCs) are the most widespread energy conversion devices used to harvest solar energy. However, Si SCs do not respond to NIR light of over 1200 nm in wavelength in the solar spectrum owing to their…show more content…
On the other hand, it has been found that spherical NPs of highly Sn-doped In (-- removed HTML --) 2 (-- removed HTML --) O (-- removed HTML --) 3 (-- removed HTML --) (ITO), which is a degenerated semiconductor with a carrier density of approximately 10 (-- removed HTML --) 21 (-- removed HTML --) cm (-- removed HTML --) −3 (-- removed HTML --) , exhibit LSPR in the NIR range of 1500–2000 nm. (-- removed HTML --) (-- removed HTML --) 13 (-- removed HTML --) (-- removed HTML --) NPs of other degenerated semiconductors, such as Ga- and Al-doped ZnO (GZO and AZO), with high carrier densities are predicted to be light absorptive materials by LSPR in the NIR range. (-- removed HTML --) (-- removed HTML --) 14 (-- removed HTML --) (-- removed HTML --) However, there still remains a gap between the Si absorption edge and the LSPR absorption range of NPs of these materials. (-- removed HTML --) (-- removed HTML --) Vanadium dioxide (VO (-- removed HTML --) 2 (-- removed HTML --) ) is unique in having metal-insulator transition at 69 °C, is a candidate material to fill the gap in the absorption range mentioned above, and attracts much attention from the both points of various applications (-- removed HTML --) (-- removed HTML --) 15–20 (-- removed HTML --) (-- removed HTML --) and a mechanism of the phase transition. In particular, LSPR in the NIR range of 1000–2000 nm has been reported for VO (-- removed HTML --) 2 (-- removed HTML --) NPs in the
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