Structural, optical, and electrical properties of laser deposited FeTiO3 films on C- and A-cut sapphire substrates

1999 ◽  
Vol 85 (10) ◽  
pp. 7433-7437 ◽  
Author(s):  
Z. Dai ◽  
H. Naramoto ◽  
K. Narumi ◽  
S. Yamamoto ◽  
A. Miyashita
Keyword(s):  
Electrical Properties ◽  
Optical And Electrical Properties ◽  
Sapphire Substrates

Transparent Conducting Zinc Stannate Films Prepared on α-Al2O3 (0001) by MOCVD

2014 ◽  
Vol 893 ◽  
pp. 558-561
Author(s):  
Feng Ji ◽  
Xue Zhang ◽  
Chang Lv ◽  
Zhen Tai Hou
Keyword(s):  
Electrical Properties ◽  
Optical And Electrical Properties ◽  
High Quality ◽  
Zinc Stannate ◽  
Sapphire Substrates ◽  
Transparent Conducting Films ◽  
Transparent Conducting

High quality crystalline zinc-stannate transparent conducting films were successfully prepared on sapphire substrates by MOCVD method. ZnSnO films with the proportions of tin and zinc from 1: 1 to 1:20 were prepared and ZnSnO3films were obtained when the proportion is 1:1. The structural, optical and electrical properties of zinc-stannate films were investigated.

Studies and Applications of Advanced Laser Scribing for High Brightness LEDs

2012 ◽  
Vol 2012 (DPC) ◽  
pp. 000684-000705
Author(s):  
Irving Chyr ◽  
Cheng Peng ◽  
Ji Wang ◽  
Jonathan Halderman
Keyword(s):  
Electron Microscopy ◽  
Electrical Properties ◽  
Light Output ◽  
Optical And Electrical Properties ◽  
Sidewall Roughness ◽  
High Brightness ◽  
Sapphire Substrates ◽  
Laser Scribing ◽  
Different Types ◽  
Line Texture

The optical and electrical properties of LEDs scribed using both traditional and advanced laser scribing were investigated. Variations in scribe line texture and depth were examined and monitored for both laser types using both optical and electron microscopy. Simulation was conducted and verified by the experimental results on laser scribing depth versus LED light output. The metrology techniques also correlated the sidewall roughness with light output of LED between traditional and advanced laser scribing. Improvements by the advanced laser scribing were demonstrated for different LED designs, such as DBR with metal mirrors. Our study showed that the advanced laser scribing is comparable to the sidewall etching process which is the current industrial standard. Our advanced laser scribing system can process different types of metal mirrors on top of DBR structures in a single tool solution. We also presented our latest results on the emerging new substrates of vertical LEDs on Si and other advanced non-sapphire substrates.

Optical and Electrical Properties of Organic Conducting Polymers

2014 ◽  
Vol 8 (1) ◽  
pp. 1457-1463
Author(s):  
Salah Abdulla Hasoon
Keyword(s):  
Electrical Properties ◽  
Conjugated Polymer ◽  
Polymeric Materials ◽  
Quantum Mechanical ◽  
Optical And Electrical Properties ◽  
Electrically Conducting ◽  
Temperature Ranges ◽  
Lithium Tetrafluoroborate ◽  
Absorbance Peak ◽  
Polymerization Method

Novel electrically conducting polymeric materials are prepared in this work. Polythiophene (PT) and poly (3-Methelthiophene) (P3MT) films were prepared by electro-polymerization method using cyclic voltammetry in acetonitrile as a solvent and lithium tetrafluoroborate as the electrolyte on a gold electrode. Electrical properties of P3MT have been examined in different environments using UV-Vis absorption spectroscopy and quantum mechanical ab initio calculations, The observed absorption peaks at 314 and 415 nm, were attributed to the n-π* and π-π* transitions, respectively in the conjugated polymer chain, in contrast, the observed absorbance peak at 649 nm, is responsible for electric conduction. The temperature dependence of the conductivity can be fitted to the Arrhenius and the VTF equations in different temperature ranges.

Effect of Gamma Radiation on Structural, Optical and Electrical Properties of nanostructured CdHgTe Thin Films

2018 ◽  
Vol 1 (1) ◽  
pp. 26-31 ◽  
Author(s):  
B Babu ◽  
K Mohanraj ◽  
S Chandrasekar ◽  
N Senthil Kumar ◽  
B Mohanbabu
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Electrical Properties ◽  
Gamma Radiation ◽  
Glass Substrate ◽  
Gamma Ray ◽  
Optical And Electrical Properties ◽  
Deposition Technique ◽  
Polycrystalline Structure ◽  
Dc Electrical Conductivity

CdHgTe thin films were grown onto glass substrate via the Chemical bath deposition technique. XRD results indicate that a CdHgTe formed with a cubic polycrystalline structure. The crystallinity of CdHgTe thin films is gradually deteriorate with increasing the gamma irradiation. EDS spectrums confirms the presence of Cd, Hg and Te elements. DC electrical conductivity results depicted the conductivity of CdHgTe increase with increasing a gamma ray dosage

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