| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
|
|---|
| Research Abstract |
The blue phosphorescence of oxidized nano-silicon layers has been investigated. It originates from molecular species in the oxide part of the material. Silicon nanocrystals are not involved in the emission process. It includes 6 sub-bands having vibrational origin and which respective intensities can be tuned by changing the excitation energy. A new band emitting in the ultraviolet region (275-290 nm) was found and attributed to water-related molecular species adsorbed at the surface of the porous material pores.
Applications in cosmetics, medicine, display and photovoltaics, have been studied. Red, blue or white emitting powders have been achieved. Samples emitting strong green (Tb doping), red (Eu doping) and also infrared (Er doping) were also developed. For electrically active devices, a new technique of metal deposition inside nano-silicon pores has been developed using a supercritical method. The layers are also promising as wide bandgap material for photovoltaics.
|
