Synthesis of graphene oxide with a lower band gap and study of charge transfer interactions with perylenediimide

2020 ◽  
Vol 44 (29) ◽  
pp. 12704-12714
Author(s):  
Komal Bhardwaj ◽  
Rachana Kumar ◽  
Naveen Joy Kindo ◽  
Nikita Vashistha ◽  
Akhilesh Kumar Patel ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Charge Transfer ◽  
Electrical Properties ◽  
Band Gap ◽  
Optical And Electrical Properties ◽  
Lower Band

The optical and electrical properties of graphene oxide (GO) have been modulated by using different chemical and physical routes.

Effect of MWCNT addition on the optical band gap of PVA/CS transient biocomposites

2021 ◽  
pp. 002199832110370
Author(s):  
Ömer Bahadır Mergen
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Band Gap ◽  
Optical Band Gap ◽  
Rapid Development ◽  
Measurement Techniques ◽  
Resistivity Measurement ◽  
Optical Parameters ◽  
Optical And Electrical Properties ◽  
Biocomposite Films

In recent years, as a result of increasing environmental concerns, biodegradable materials have gained great attention. With the rapid development of electronic technology, the importance of innovation and development of low-cost, sustainable, transient bioelectronics materials is increasing. In this research, the preparation of Poly(Vinyl Alcohol) (PVA), Chitosan (CS), and Multi-Walled Carbon nanotube (MWCNT) biocomposite films have been described. The solution mixing, ultrasonic mixing, and spin coating techniques were used to prepare the PVA/CS/MWCNT biocomposite thin films. UV–Vis absorption spectroscopy and two-point probe resistivity measurement techniques were used to study the optical and electrical properties of the biocomposite thin films. Optical band gap energies ( Eg) of PVA/CS/MWCNT biocomposites were obtained using the Tauc and Absorbance Spectrum Fitting (ASF) methods. Results obtained with both methods were found to be exactly the same. Experimental results have shown that with increasing MWCNT concentration, electrical conductivity (σ) increases from 1.75x10−16 S to 2.94x10−3 S, and Eg decreases significantly. At the same time, the fundamental optical parameters such as band tail (Urbach) energy ( Eu), refractive index ( n), absorption ( α), and extinction ( k) coefficient of the PVA/CS/MWCNT biocomposites were investigated in the UV-VIS range. The improvement observed in the optical and electrical properties of PVA/CS/MWCNT biocomposite films shows that these composites could be used as bioelectronics materials.

Investigation of Optical and Electrical Properties of Wide Band Gap Materials

1976 ◽  
Author(s):  
Phil Won Yu ◽  
Samuel Faile ◽  
Hans Stocker ◽  
James Schneider
Keyword(s):  
Electrical Properties ◽  
Band Gap ◽  
Wide Band ◽  
Optical And Electrical Properties ◽  
Wide Band Gap

Lead-free double perovskites Cs2InCuCl6 and (CH3NH3)2InCuCl6: electronic, optical, and electrical properties

Nanoscale ◽  
2019 ◽  
Vol 11 (23) ◽  
pp. 11173-11182 ◽  
Author(s):  
Hung Q. Pham ◽  
Russell J. Holmes ◽  
Eray S. Aydil ◽  
Laura Gagliardi
Keyword(s):  
Electrical Properties ◽  
Band Gap ◽  
Lead Free ◽  
Double Perovskites ◽  
Optical And Electrical Properties ◽  
Optoelectronic Applications

Two indium-based double perovskites, Cs2InCuCl6 and (CH3NH3)2InCuCl6, were proposed as promising materials for photovoltaic and optoelectronic applications with a suitable band gap and exceptional optical and electrical properties.

Graphene Oxide Nanoscrolls: Synthesis, Characterization, Optical, and Electrical Properties

2019 ◽  
Vol 14 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Manal A. Awad ◽  
Leena Aljasem ◽  
Nawal A. Modkhali ◽  
Hajar Aldakheel ◽  
Wadha. Alenazi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrical Properties ◽  
Optical And Electrical Properties

Optical and Electrical Properties of Graphene Oxide

2018 ◽  
Vol 125 (6) ◽  
pp. 1014-1018 ◽  
Author(s):  
A. A. Babaev ◽  
M. E. Zobov ◽  
D. Yu. Kornilov ◽  
S. V. Tkachev ◽  
E. I. Terukov ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrical Properties ◽  
Optical And Electrical Properties

Optical And Electrical Properties Of Doped Polysilanes

1993 ◽  
Vol 328 ◽  
Author(s):  
M. Kakimoto ◽  
H. Ueno ◽  
H. Kojima ◽  
Y. Yamaguchi ◽  
A. Nishimura
Keyword(s):  
Charge Transfer ◽  
Electrical Properties ◽  
Optical Absorption ◽  
Strong Interaction ◽  
Optical And Electrical Properties ◽  
Spectral Change ◽  
Iodine Doping ◽  
Spectral Changes ◽  
Doping Effects

ABSTRACTThe doping effects on optical and electrical properties of polysilanes have been investigated by in-situ Measurement. An optical absorption associated with σ–σ* transition was observed near 330 nm for polymethylphenylsilane. By iodine doping, a new absorption was observed at the longer wavelength around 420 nm, which should originate from the charge transfer between dopant and Σ-conjugated system. Similar spectral changes have also been observed for most of investigated linear polysilanes.Furthermore, we have found drastic spectral change upon iodine doping into polysilane with p-N,N-dimethyIaminophenyI substituent. It has very strong absorption up to 700 nm. It Might originate from a strong interaction between the substituent and iodine. At the same time, Σ-conjugation Might also play a significant role on doping into this system.

Optical and electrical properties of β-Ni (OH)2/reduced graphene oxide nanocomposite

2018 ◽  
Vol 672 (1) ◽  
pp. 168-177
Author(s):  
V. M. Boychuk ◽  
V. O. Kotsyubunsky ◽  
Kh. V. Bandura ◽  
A. B. Hrubiak ◽  
B. I. Rachii ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrical Properties ◽  
Reduced Graphene Oxide ◽  
Optical And Electrical Properties ◽  
Reduced Graphene
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