scholarly journals Doping concentration dependence of the photoluminescence spectra of n-type GaAs nanowires

2016 ◽  
Vol 108 (18) ◽  
pp. 182106 ◽  
Author(s):  
Shermin Arab ◽  
Maoqing Yao ◽  
Chongwu Zhou ◽  
P. Daniel Dapkus ◽  
Stephen B. Cronin
Keyword(s):  
Concentration Dependence ◽  
Doping Concentration ◽  
Photoluminescence Spectra ◽  
Gaas Nanowires

scholarly journals On the doping concentration dependence and dopant selectivity of photogenerated carrier assisted etching of 4H–SiC epilayers

2019 ◽  
Vol 323 ◽  
pp. 134778
Author(s):  
Shojan P. Pavunny ◽  
Rachael L. Myers-Ward ◽  
Kevin M. Daniels ◽  
Wendy Shi ◽  
Karthik Sridhara ◽  
...  
Keyword(s):  
Concentration Dependence ◽  
Doping Concentration ◽  
Photogenerated Carrier

Doping-concentration dependence of a boron-doped p-type Ge layer grown on a Si (100) substrates by using RTCVD

2014 ◽  
Vol 64 (3) ◽  
pp. 443-450
Author(s):  
Yeon-Ho Kil ◽  
Hyeon Deok Yang ◽  
Jong-Han Yang ◽  
Sukill Kang ◽  
Tae Soo Jeong ◽  
...  
Keyword(s):  
Concentration Dependence ◽  
Doping Concentration ◽  
Boron Doped ◽  
P Type

scholarly journals Influence of Mn2+ doping on structural phase transformation and optical property of TiO2:Mn2+ nanoparticles

2019 ◽  
Vol 29 (3) ◽  
Author(s):  
Trinh Thi Loan ◽  
Nguyen Ngoc Long
Keyword(s):  
Tio2 Nanoparticles ◽  
Doping Concentration ◽  
Sol Gel ◽  
Structural Phase ◽  
Photoluminescence Spectra ◽  
X Ray Diffraction ◽  
Defect States ◽  
Ion Doping ◽  
Raman Modes ◽  
Synthesized Materials

Titanium dioxide (TiO2) nanoparticles with various Mn2+-doping concentration (from 0 to 12 mol%) were successfully synthesized by the sol–gel method using titanium tetrachloride (TiCl4), and manganese II chloride tetrahydrate (MnCl2.4H2O)  as precursors. The phase and crystallinity of the synthesized materials were investigated by powder X-ray diffraction pattern and Raman spectroscopy. Diffuse reflection and photoluminescence spectra were taken to investigate the absorption and emission characteristics of the synthesized samples. The results show that the anatase and rutile phases existed simultaneously in all the doping TiO2 nanoparticles and the Mn2+ doping enhances anatase-rutile transformation. The Mn2+ contents did not affect the lattice of TiO2 host, but affected positions of its Raman modes. The optical band gap of the TiO2:Mn2+ decreases with the increase of doping concentration. Photoluminescence spectra of the TiO2:Mn2+ nanopaticles showed the transitions between the bands, the transitions related to defect states and the Mn2+ ion doping leads to quenching the photoluminescence.

A Novel Blue-Green-Emitting Phosphor Gd4.67Si3O13:Tb3+

2016 ◽  
Vol 16 (4) ◽  
pp. 3861-3864
Author(s):  
Ye Jin ◽  
Qingping Wang
Keyword(s):  
Doping Concentration ◽  
Dipole Interaction ◽  
Concentration Quenching ◽  
Photoluminescence Spectra ◽  
X Ray Diffraction ◽  
Quenching Mechanism ◽  
Solid State Method ◽  
X Ray ◽  
As Doping ◽  
Cie Coordinates

A novel blue-green-emitting phosphor Gd4.67Si3O13:Tb3+ has been synthesized by a conventional high temperature solid-state method at 1350 °C for 6 h. X-ray diffraction and photoluminescence spectra were used to characterize the as-synthesized phosphor. The excitation spectrum is composed of a broadband and two sharp peaks, at 274 nm, and 311 nm, respectively. The emission spectrum is composed of multiple sharp peaks, of which the strongest peak is at 544 nm (5D4 →7F5). The critical doping content of Tb3+ is 5%, with the emission intensity increasing proportionally with Tb3+ concentration increase until it reaches 5%. As doping concentration from 5% to 7%, the luminescence intensity gradually reduces. Concentration quenching mechanism for Tb3+ is demonstrated to be dipole–dipole interaction. The Commission Internationale de L’Eclairage (CIE) coordinates are also investigated in this work. The CIE coordinates of the Gd4.67Si3O13:0.03Tb3+ phosphor upon 311 nm excitation are (0.242, 0.323). All the results indicate that the blue-green-emitting phosphor Gd4.67Si3O13:Tb3+ has potential research value.

scholarly journals Doping concentration dependence of microstructure and magnetic behaviours in Co-doped TiO2 nanorods

2014 ◽  
Vol 9 (1) ◽  
pp. 673 ◽  
Author(s):  
Li-Ting Tseng ◽  
Xi Luo ◽  
Thiam Tan ◽  
Sean Li ◽  
Jiabao Yi
Keyword(s):  
Concentration Dependence ◽  
Doping Concentration ◽  
Tio2 Nanorods ◽  
Doped Tio2 ◽  
Co Doped
Sign in / Sign up

Export Citation Format

Share Document