EFFECT OF SYNTHESIS REACTION TIME AND DOPING ON UV/VIS ABSORPTION OF POLYENE COATING

2017 ◽  
Vol 79 (2) ◽  
Author(s):  
Mohd Nurazzi Norizan ◽  
Rahmah Mohamed
Keyword(s):  
Reaction Time ◽  
Band Gap ◽  
Energy Band ◽  
Lower Energy ◽  
Control Sample ◽  
Reaction Times ◽  
Energy Band Gap ◽  
Lower Energy Band ◽  
Dechlorination Reaction ◽  
Absorbance Spectra

Absorbance spectra and energy band gap of synthesizing polyene from dechlorination of polyvinyl chloride (PVC) with varying synthesizing reaction times and doping percentages were examined in this paper. The reaction time of dechlorination was varied from 30 minutes, 1 hour, 2 hours and 4 hours. Polyene obtained from the dechlorination reaction was doped with potassium iodide (KI). Sample for UV/Vis test was prepared in the form of film. Modified EO film as control sample showed that there is only a single absorption peak around 327nm. The C-Cl adsorption band link from source link polymer was observed at 422nm and all polyene film samples and new bands absorption were observed from 422nm to 590nm, and 683nm upon the increase in reaction time. The lower energy band gap was observed at 683.18nm absorption with 1.08eV.    

Thickness Dependent on Energy Band Gap and Electrical Conductivity of Undoped Conjugated Polymer Thin Films

2016 ◽  
Vol 846 ◽  
pp. 620-625 ◽  
Author(s):  
Hamizah Nadia Alias@Yusof ◽  
Hasiah Salleh ◽  
Mohd Ikmar Nizam Mohamad Isa
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Conductivity ◽  
Band Gap ◽  
Energy Band ◽  
Conjugated Polymer ◽  
Polymer Thin Films ◽  
Energy Band Gap ◽  
Lower Energy Band ◽  
Ito Glass

Conjugated polymers have been widely used for electronic purpose applications due to their numerous advantages. This has led many researches to pay their major attention in studying on characteristics of conjugated polymer thin films. The purpose of this study was to investigate the effect of undoped conjugated polymer thin films on their optical and electrical properties. Poly(3-thiophene acetic acid), Polypyrrole and Polythiophene thin film was fabricated on ITO glass substrate by using EIS. Film thickness, energy band gap and electrical conductivity of thin films were characterized by using profilometer, ultraviolet-visible spectrometer and four point probe method respectively. The thickness of each thin film varied between 50.534 nm to 97.03 nm. The result has shown that thicker film has lower energy band gap compared to the thinner one. However the electrical conductivity showed an opposite behavior.

scholarly journals No Resistive Normal Electrons in Beginning Superconducting States

Mathematics ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1512
Author(s):  
Changho Seo ◽  
Seongsoo Cho ◽  
Je Huan Koo
Keyword(s):  
Band Gap ◽  
Energy Band ◽  
Energy Band Gap

We investigate why normal electrons in superconductors have no resistance. Under the same conditions, the band gap is reduced to zero as well, but normal electrons at superconducting states are condensed into this virtual energy band gap.

Energy Band Gap Studies of CdS Nanomaterials

2008 ◽  
Vol 3 ◽  
pp. 97-102 ◽  
Author(s):  
Dinu Patidar ◽  
K.S. Rathore ◽  
N.S. Saxena ◽  
Kananbala Sharma ◽  
T.P. Sharma
Keyword(s):  
Optical Absorption ◽  
Band Gap ◽  
Energy Band ◽  
Chemical Method ◽  
Optical Absorption Spectroscopy ◽  
Cds Nanoparticles ◽  
X Ray Diffraction ◽  
Energy Band Gap ◽  
X Ray ◽  
Simple Chemical

The CdS nanoparticles of different sizes are synthesized by a simple chemical method. Here, CdS nanoparticles are grown through the reaction of solution of different concentration of CdCl2 with H2S. X-ray diffraction pattern confirms nano nature of CdS and has been used to determine the size of particle. Optical absorption spectroscopy is used to measure the energy band gap of these nanomaterials by using Tauc relation. Energy band gap ranging between 3.12 eV to 2.47 eV have been obtained for the samples containing the nanoparticles in the range of 2.3 to 6.0 nm size. A correlation between the band gap and size of the nanoparticles is also established.

Tailoring energy band gap and optical absorption of Cd doped MnTe2

2020 ◽  
pp. 111059
Author(s):  
B. Thapa ◽  
P.K. Patra ◽  
Sandeep Puri ◽  
K. Neupane ◽  
A. Shankar
Keyword(s):  
Optical Absorption ◽  
Band Gap ◽  
Energy Band ◽  
Energy Band Gap

Energy band gap of the alloy Zn1−xMgxSeyTe1−y lattice matched to ZnTe, InAs and InP

2000 ◽  
Vol 214-215 ◽  
pp. 350-354 ◽  
Author(s):  
Kyurhee Shim ◽  
Herschel Rabitz ◽  
Ji-Ho Chang ◽  
Takafumi Yao
Keyword(s):  
Band Gap ◽  
Energy Band ◽  
Energy Band Gap ◽  
Lattice Matched
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