| Project/Area Number |
22560040
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Applied optics/Quantum optical engineering
|
|---|
| Research Institution | Shizuoka University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2010 – 2012
|
| Project Status |
Completed (Fiscal Year 2012)
|
| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
|---|
| Keywords | 紫外光源 / 発光材料 / 酸化亜鉛 / 紫外発光 / レアアースフリー / 電子線励起 |
|---|
| Research Abstract |
Recently, the Hg free UV emissiondevices have been demanded for the application of catalyst and medical situations. The field emission lamp (FEL) using phosphor which shows UV emission is some advantages, for example, large area production, the resin free and the suppression of degradations compared with LEDs. ZnO is well known material which shows UV emission peaked at 375 nm of exciton or blue-green emission peaked around 510 nm from oxygen vacancies. This phosphor is quite stable under high density electron beam irradiation. In our previous work, it was found that ZnO - based oxide materials showed UV emission under excitation by electron beam. Especially, ZnAl_2O_4showed strong UV emission peaked at 250 nm. In this work, to investigate to mechanism of UV emission from ZnAl_2O_4. From the results, CL intensity became strong according to increase of firing temperature, because of improvement of crystallinity of the powders. The peak position of CL spectra wereshifted from 235 nm to 250 nm by control of the ratio of source materials. The band gap of ZnAl_2O_4was about 7 eV. It was thought that the origin of UV emission was caused from oxygen vacancies.
|
