scholarly journals Study of Ultraviolet Emission Spectra in ZnO Thin Films

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Y. M. Lu ◽  
X. P. Li ◽  
P. J. Cao ◽  
S. C. Su ◽  
F. Jia ◽  
...  
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Free Exciton ◽  
Emission Spectra ◽  
Low Energy ◽  
Zno Thin Films ◽  
Ultraviolet Emission ◽  
Exciton Transition ◽  
Pl Spectra ◽  
Uv Emission

Photoluminescence (PL) of ZnO thin films prepared on c-Al2O3substrates by pulsed laser deposition (PLD) are investigated. For all samples, roomtemperature (RT) spectra show a strong band-edge ultraviolet (UV) emission with a pronounced low-energy band tail. The origin of this UV emission is analyzed by the temperature dependence of PL spectra. The result shows that the UV emission at RT contains different recombination processes. At low temperature donor-bound exciton (D0X) emission plays a major role in PL spectra, while the free exciton transition (FX) gradually dominates the spectrum with increasing temperatures. It notes that at low temperature an emission band (FA) appears in low energy side of D0X and FX and can survive up to RT. Further confirmation shows that the origin of the band FA can be attributed to the transitions of conduction band electrons to acceptors (e, A0), in which the acceptor binding energy is estimated to be approximately 121 meV. It is concluded that at room temperature UV emission originates from the corporate contributions of the free exciton and free electrons-to-acceptor transitions.

Ultraviolet emission enhancement in ZnO thin films modified by nanocrystalline TiO 2

2017 ◽  
Vol 67 ◽  
pp. 139-144 ◽  
Author(s):  
Gaige Zheng ◽  
Xi Lu ◽  
Liming Qian ◽  
Fenglin Xian
Keyword(s):  
Thin Films ◽  
Zno Thin Films ◽  
Ultraviolet Emission ◽  
Emission Enhancement

Low temperature electrochemical deposition of nanoporous ZnO thin films as novel NO2 sensors

2013 ◽  
Vol 90 ◽  
pp. 530-534 ◽  
Author(s):  
Shouli Bai ◽  
Chuanzhen Sun ◽  
Teng Guo ◽  
Ruixian Luo ◽  
Yuan Lin ◽  
...  
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Electrochemical Deposition ◽  
Zno Thin Films

Low-temperature deposition of ZnO thin films on PET and glass substrates by DC-sputtering technique

2006 ◽  
Vol 496 (1) ◽  
pp. 112-116 ◽  
Author(s):  
A.N. Banerjee ◽  
C.K. Ghosh ◽  
K.K. Chattopadhyay ◽  
Hideki Minoura ◽  
Ajay K. Sarkar ◽  
...  
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Zno Thin Films ◽  
Glass Substrates ◽  
Dc Sputtering ◽  
Low Temperature Deposition ◽  
Temperature Deposition ◽  
Dc Sputtering Technique

Growth of Heteroepitaxial ZnO Thin Films on GaN-Buffered Al2O3 (0001) Substrates by Low-Temperature Hydrothermal Synthesis at 90 °C

2007 ◽  
Vol 17 (3) ◽  
pp. 463-471 ◽  
Author(s):  
J. H. Kim ◽  
E.-M. Kim ◽  
D. Andeen ◽  
D. Thomson ◽  
S. P. DenBaars ◽  
...  
Keyword(s):  
Thin Films ◽  
Hydrothermal Synthesis ◽  
Low Temperature ◽  
Zno Thin Films

Enhancement Of Free Exciton Peak Intensity In Reactively Sputtered ZnO Thin Films On (0001) Al2O3

2007 ◽  
Author(s):  
S. Tüzemen ◽  
Emre Gür ◽  
T. Yildirim ◽  
G. Xiong ◽  
R. T. Williams
Keyword(s):  
Thin Films ◽  
Free Exciton ◽  
Zno Thin Films ◽  
Exciton Peak ◽  
Peak Intensity

Bonding and stoichiometry in low-energy radio frequency magnetron sputtered ZnO thin films on flexible substrate

Vacuum ◽  
2021 ◽  
Vol 183 ◽  
pp. 109869
Author(s):  
Chukwudi E. Iheomamere ◽  
Corey L. Arnold ◽  
Urmilaben P. Rathod ◽  
Khalil D. Omotosho ◽  
Andrey A. Voevodin ◽  
...  
Keyword(s):  
Thin Films ◽  
Radio Frequency ◽  
Flexible Substrate ◽  
Radio Frequency Magnetron ◽  
Low Energy ◽  
Zno Thin Films

Optical Properties of Nanostructured Zinc Oxides Deposited on Silicon Substrates

2011 ◽  
Vol 312-315 ◽  
pp. 1132-1136 ◽  
Author(s):  
Mohamad Hafiz Mamat ◽  
Zuraida Khusaimi ◽  
Mohamad Mahmood Rusop
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Spin Coating ◽  
Sol Gel ◽  
Zno Thin Films ◽  
Silicon Substrates ◽  
Annealing Temperatures ◽  
Uv Emission ◽  
Zinc Oxides ◽  
Optically Transparent

Nanostructured zinc oxide (ZnO) thin films were prepared through sol-gel method and spin-coating technique. ZnO thin films then were annealed at temperature of 350°C, 400°C, 450°C and 500°C. The thin films were characterized using field emission scanning electron microscope (FESEM), UV-VIS-NIR spectrophotometer and photoluminescence (PL) spectrofluorometer for morphology and optical properties study. The morphology study indicates that the particle size of ZnO increased with annealing temperatures. All thin films are optically transparent (~ 80 % in transmittance) in the visible light-NIR region. PL spectra reveal improved UV emission with annealing temperatures up to 500°C.

Low-temperature preparation of transparent conductive Al-doped ZnO thin films by a novel sol–gel method

2014 ◽  
Vol 49 (14) ◽  
pp. 4722-4734 ◽  
Author(s):  
Dongyun Guo ◽  
Kuninori Sato ◽  
Shingo Hibino ◽  
Tetsuya Takeuchi ◽  
Hisami Bessho ◽  
...  
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Sol Gel ◽  
Zno Thin Films ◽  
Gel Method ◽  
Sol Gel Method ◽  
Low Temperature Preparation ◽  
Doped Zno ◽  
Temperature Preparation

scholarly journals High electron mobility and low carrier concentration of hydrothermally grown ZnO thin films on seeded a-plane sapphire at low temperature

2015 ◽  
Vol 10 (1) ◽  
Author(s):  
Nurul Azzyaty Jayah ◽  
Hafizal Yahaya ◽  
Mohamad Rusop Mahmood ◽  
Tomoaki Terasako ◽  
Kanji Yasui ◽  
...  
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Carrier Concentration ◽  
Electron Mobility ◽  
Zno Thin Films ◽  
High Electron ◽  
High Electron Mobility
Sign in / Sign up

Export Citation Format

Share Document