Incandescent lamp-like white-light emission from doped and undoped oxide nanopowders
Yazarlar (7)
Maura Cesaria Università Del Salento, İtalya
Prof. Dr. Gökhan BİLİR Kafkas Üniversitesi, Türkiye
Gönül Özen
İstanbul Teknik Üniversitesi, Türkiye
İstanbul Teknik Üniversitesi, Türkiye
Marco Bettinelli Università Degli Studi Di Verona, İtalya
John Collins
Wheaton College, Amerika Birleşik Devletleri
Wheaton College, Amerika Birleşik Devletleri
Fabio Piccinelli Università Degli Studi Di Verona, İtalya
Baldassare Di Bartolo
Boston College, Amerika Birleşik Devletleri
Boston College, Amerika Birleşik Devletleri
| Makale Türü | Özgün Makale (SCOPUS dergilerinde yayınlanan 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 / Sayı / Sayfa | 68 / 1 / 273–284 | DOI | 10.1007/978-94-017-9133-5__12 |
| 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 |
BM Sürdürülebilir Kalkınma Amaçları
| Atıf Sayıları |