scholarly journals Photoinduced effect in Cu doping La0.67Sr0.33Cux Mn1-xO3 thin films

2009 ◽  
Vol 58 (7) ◽  
pp. 4953
Author(s):  
Jin Ke-Xin ◽  
Zhao Sheng-Gui ◽  
Chen Chang-Le
Keyword(s):  
Thin Films ◽  
Cu Doping ◽  
Photoinduced Effect

scholarly journals The effect of Cu doping on the ordering of FexPt1－x thin films

2006 ◽  
Vol 55 (5) ◽  
pp. 2567
Author(s):  
Li Bao-He ◽  
Feng Chun ◽  
Yang Tao ◽  
Zhai Zhong-Hai ◽  
Teng Jiao ◽  
...  
Keyword(s):  
Thin Films ◽  
Cu Doping

STUDYING STRUCTURAL, OPTICAL, ELECTRICAL, AND SENSING PROPERTIES OF NANOCRYSTALLINE SnO2:Cu FILMS PREPARED BY SOL–GEL METHOD FOR CO GAS SENSOR APPLICATION AT LOW TEMPERATURE

2017 ◽  
Vol 24 (08) ◽  
pp. 1750110 ◽  
Author(s):  
SELMA M. H. AL-JAWAD ◽  
ABDULHUSSAIN K. ELTTAYF ◽  
AMEL S. SABER
Keyword(s):  
Thin Films ◽  
Absorption Coefficient ◽  
Doping Concentration ◽  
Energy Gap ◽  
Sol Gel ◽  
Ultraviolet Emission ◽  
Rutile Structure ◽  
Cu Doping ◽  
Sensing Properties ◽  
Co Gas

Nanocrystalline SnO2 and SnO2:Cu thin films derived from SnCl[Formula: see text]H2O precursors have been prepared on glass substrates using sol–gel dip-coating technique. The deposited film was [Formula: see text][Formula: see text]nm thick and the films were annealed in air at 500[Formula: see text]C for 1[Formula: see text]h. Structural, optical and sensing properties of the films were studied under different preparation conditions, such as Cu-doping concentration of 2%, 4% and 6[Formula: see text]wt.%. X-ray diffraction studies show the polycrystalline nature with tetragonal rutile structure of SnO2 and Cu:SnO2 thin films. The films have highly preferred orientation along (110). The crystallite size of the prepared samples reduced with increasing Cu-doping concentrations and the addition of Cu as dopants changed the structural properties of the thin films. Surface morphology was determined through scanning electron microscopy and atomic force microscopy. Results show that the particle size decreased as doping concentration increased. The films have moderate optical transmission (up to 82.4% at 800[Formula: see text]nm), and the transmittance, absorption coefficient and energy gap at different Cu-doping concentration were measured and calculated. Results show that Cu-doping decreased the transmittance and energy gap whereas it increased the absorption coefficient. Two peaks were noted with Cu-doping concentration of 0–6[Formula: see text]wt.%; the first peak was positioned exactly at 320[Formula: see text]nm ultraviolet emission and the second was positioned at 430–480[Formula: see text]nm. Moreover, emission bands were noticed in the photoluminescence spectra of Cu:SnO2. The electrical properties of SnO2 films include DC electrical conductivity, showing that the films have two activation energies, namely, [Formula: see text] and [Formula: see text], which increase as Cu-doping concentration increases. Cudoped nanocrystalline SnO2 gas-sensing material has better sensitivity to CO gas compared with pure SnO2.

Stabilizing the metastable γ phase in Ga2O3 thin films by Cu doping

2018 ◽  
Vol 731 ◽  
pp. 1225-1229 ◽  
Author(s):  
Qi Liu ◽  
Daoyou Guo ◽  
Kai Chen ◽  
Yuanli Su ◽  
Shunli Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
Cu Doping

Effect of Cu Doping on the Gas Sensing Properties of Nano-Crystalline NiO Thin Films

2013 ◽  
Vol 1 (2) ◽  
pp. 143-147
Author(s):  
Y. Ashok Kumar Reddy ◽  
B. Ajitha ◽  
A. Sivasankar Reddy ◽  
P. Sreedhara Reddy
Keyword(s):  
Thin Films ◽  
Gas Sensing ◽  
Cu Doping ◽  
Sensing Properties ◽  
Nano Crystalline ◽  
Gas Sensing Properties

Cu-doping effects on the physical properties of cadmium sulfide thin films

2012 ◽  
Vol 512 (1) ◽  
pp. 185-189 ◽  
Author(s):  
N.A. Shah ◽  
R.R. Sagar ◽  
W. Mahmood ◽  
W.A.A. Syed
Keyword(s):  
Thin Films ◽  
Physical Properties ◽  
Cadmium Sulfide ◽  
Cu Doping ◽  
Doping Effects

Preparation and Characterization of Cu-Doped Zno Sol-Gel Derived Optical Thin Films

2013 ◽  
Vol 802 ◽  
pp. 124-128 ◽  
Author(s):  
Krisana Chongsri ◽  
Siriwattana Aunpang ◽  
Wicharn Techitdheera ◽  
Wisanu Pecharapa
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Sol Gel ◽  
Copper Acetate ◽  
Visible Region ◽  
Ambient Air ◽  
Doping Content ◽  
Acetate Dihydrate ◽  
Cu Doping ◽  
Doped Zno

In this work, we report the preparation of Cu-doped ZnOthin films by sol-gel method based on zinc acetate dihydrate (CH3COO)2Zn·2H2O, Copper acetate dihydrate Cu3(CH3COO)2·H2O) and diethanolamine (HN(CH2OH)2, DEA). The precursor solution was prepared at various Cu composition ranging from 2-20 wt%. All films were spin-coated on borosilicate substrates for several coating repetition followed by annealing process at 550 °C for 4 h in an ambient air. The structural properties of the films were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The XRD results indicate the domination of hexagonal wurtzite structure of ZnO with noticeable alternation in the XRD peak intensity upon Cu doping content. SEM results revealed the grain size shape and surface morphologies of as-prepared samples. Crucial optical properties of as-prepared films were scrutinized from their UV-Vis transmission spectra. The films are highly transparent in the visible region with more than 90 % transparency within 380 nm to 800 nm. Their corresponding band gaps indicate significant red shift with increasing Cu doping content. Overall results suggest that Cu additive play a vital role on relevant optical properties of ZnO that can be adjusted to meet the requirement for practical optoelectronics applications.

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