| Yazarlar |
Maura Cesaria
Università del Salento, Italy |
Gökhan BİLİR
Kafkas Üniversitesi, Türkiye |
|
Gönül Özen
İstanbul Teknik Üniversitesi, Turkey |
|
Marco Bettinelli
Università degli Studi di Verona, Italy |
|
John Collins
Wheaton College, United States |
|
Fabio Piccinelli
Università degli Studi di Verona, Italy |
|
Baldassare di Bartolo
Boston College, United States |
| Özet |
| We report the production of a broad band emission (ranging from 400 to 900 nm) following the monochromatic infrared light (803.5 nm) continuous wave excitation of either nominally un-doped or Nd-doped up to 20% yttrium oxide (Y2O3) nanopowders, Y3Al5O12 (YAG) and Cr3+ doped Gd3Ga5O12 (GGG) nanocrystallites. Our experimental results indicate that such emission feature is (i) a nano-scale phenomenon, (ii) demands a threshold pumping power, (iii) cannot be ascribed to an overlap of sharp emission bands in the un-doped case and, (iv) even if assisted by the dopant presence, is a host matrix-related process. In the case of the Y2O3-based samples, we demonstrate the possibility to obtain “warm” white light with high efficiency and color rendering index approaching the theoretical limit with an alternative approach. Our experimental results make our white light emission very interesting at both fundamental and applicative levels and may open the way to an alternative route with respect to incandescent lamps. |
| Anahtar Kelimeler |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SCOPUS dergilerinde yayımlanan tam makale |
| Dergi Adı | NATO Science for Peace and Security Series B: Physics and Biophysics |
| Dergi ISSN | 1874-6500 |
| Makale Dili | İngilizce |
| Basım Tarihi | 01-2015 |
| Cilt No | 68 |
| Sayı | 1 |
| Sayfalar | 273 / 284 |
| Doi Numarası | 10.1007/978-94-017-9133-5__12 |
| Atıf Sayıları | |
| Google Scholar | 1 |
