white light – TechConnect Briefs

Upconversion and White Light Generation Properties of Undoped and Yb3+ doped Yttrium Silicate Nano-Phosphors

Cinkaya H., Eryurek G., Bartolo B.D., Boston College, US

The optical systems that consist of rare earth ions embedded in a host lattice are very interesting materials for many applications such as optical sensing, data storage, nonlinear imaging and biomedical applications [1, 2, 3]. [...]

Optical-base pressure sensing ability of Yb3+:Y2Si2O7 nanoparticles

Erdem M., Eryurek G., Dibartolo B., Marmara University, TR

We report the the drastic dependence on pressure of the spectral output of Yb3+:Y2Si2O7 nanoparticles under IR excitation. The spectrum obtained at atmospheric pressure consisted of an intense blue band. At low pressure the spectrum [...]

Effect of Pressure and Excitation Power on Up-conversion Assisted White Light Emission in Yttrium Oxide and Silicate Nanophosphors

Eryurek G., Erdem M., Bilir G., Istanbul Technical University, TR

The production of warm artificial white light (WL) become a big challenge of engineers and scientists after the revolutionary introduction of incandescent lamp by Thomas Edison. Although several strategies have been developed in past, none [...]

Upconversion emission properties and un-expected white light emission from Er3+/Yb3+ doped Gd2O3 nano – phosphors

Bilir G., Erguzel O., Eryurek G., Istanbul Technical University, TR

Gd2O3 nano-powders doped with Er3+ and Yb3+ were synthesized using the combustion method. X-ray diffraction and the scanning electron microscope techniques were used to estimate the crystalline sizes and the morphologies of the materials. The [...]