scholarly journals Fabrication and Characterisation of Organic EL Devices in the Presence of Cyclodextrin as an Interlayer

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3666
Author(s):  
Michihiro Hara ◽  
Takao Umeda ◽  
Hiroyuki Kurata
Keyword(s):  
Indium Tin Oxide ◽  
Organic Molecules ◽  
Light Emission ◽  
Green Emission ◽  
Coated Glass Substrate ◽  
Organic Electroluminescence ◽  
Cyclodextrin Polymer ◽  
Electroluminescence Device ◽  
Potential Energy Saving ◽  
Self Association

This study examined glass-based organic electroluminescence in the presence of a cyclodextrin polymer as an interlayer. Glass-based organic electroluminescence was achieved by the deposition of five layers of N,N’-Bis(3-methylphenyl)N,N’-bis(phenyl)-benzidine, cyclodextrin polymer (CDP), tris-(8-hydroxyquinolinato) aluminium LiF and Al on an indium tin oxide-coated glass substrate. The glass-based OEL exhibited green emission owing to the fluorescence of tris-(8-hydroxyquinolinato) aluminium. The highest luminance was 19,620 cd m−2. Moreover, the glass-based organic electroluminescence device showed green emission at 6 V in the curved state because of the inhibited aggregation of the cyclodextrin polymer. All organic molecules are insulating, but except CDP, they are standard molecules in conventional organic electroluminescence devices. In this device, the CDP layer contained pores that could allow conventional organic molecules to enter the pores and affect the organic electroluminescence interface. In particular, self-association was suppressed, efficiency was improved, and light emission was observed without the need for a high voltage. Overall, the glass-based organic electroluminescence device using CDP is an environmentally friendly device with a range of potential energy saving applications.

Raman Spectra of Molecularly-Ordered 1-TNATA Thin Films and Organic Electroluminescence Device Properties

2009 ◽  
Vol 498 (1) ◽  
pp. 193-202 ◽  
Author(s):  
Youngson Choe ◽  
Young-Rae Cho ◽  
Dosoon Kang ◽  
Wonho Kim ◽  
Dae-Won Park
Keyword(s):  
Thin Films ◽  
Raman Spectra ◽  
Organic Electroluminescence ◽  
Electroluminescence Device ◽  
Device Properties

Rare Earth Ion Implantation for Silicon Based Light Emission

2005 ◽  
Vol 108-109 ◽  
pp. 755-760 ◽  
Author(s):  
Wolfgang Skorupa ◽  
J.M. Sun ◽  
S. Prucnal ◽  
L. Rebohle ◽  
T. Gebel ◽  
...  
Keyword(s):  
Rare Earth ◽  
Ion Implantation ◽  
Indium Tin Oxide ◽  
Light Emission ◽  
Charge Trapping ◽  
Electrical Performance ◽  
Rare Earth Ion ◽  
Light Emitting ◽  
Silicon Based ◽  
Luminescent Centers

Using ion implantation different rare earth luminescent centers (Gd3+, Tb3+, Eu3+, Ce3+, Tm3+, Er3+) were formed in the silicon dioxide layer of a purpose-designed Metal Oxide Silicon (MOS) capacitor with advanced electrical performance, further called a MOS-light emitting device (MOSLED). Efficient electroluminescence was obtained for the wavelength range from UV to infrared with a transparent top electrode made of indium-tin oxide. Top values of the efficiency of 0.3 % corresponding to external quantum efficiencies distinctly above the percent range were reached. The electrical properties of these devices such as current-voltage and charge trapping characteristics, were also evaluated. Finally, application aspects to the field of biosensing will be shown.

Stimulated Light Emission by Optical Pumping and by Energy Transfer in Organic Molecules

1962 ◽  
Vol 8 (1) ◽  
pp. 23-25 ◽  
Author(s):  
D. J. Morantz ◽  
B. G. White ◽  
A. J. C. Wright
Keyword(s):  
Energy Transfer ◽  
Optical Pumping ◽  
Organic Molecules ◽  
Light Emission

The Origin of Green Emission of ZnO Microcrystallites:  Surface-Dependent Light Emission Studied by Cathodoluminescence

2007 ◽  
Vol 111 (32) ◽  
pp. 12091-12093 ◽  
Author(s):  
Xi Zhou ◽  
Qin Kuang ◽  
Zhi-Yuan Jiang ◽  
Zhao-Xiong Xie ◽  
Tao Xu ◽  
...  
Keyword(s):  
Light Emission ◽  
Green Emission

Growth and Density Control of Carbon Tubule Nanocoils Using Catalyst of Iron Compounds

2002 ◽  
Vol 17 (1) ◽  
pp. 145-148 ◽  
Author(s):  
Lujun Pan ◽  
Taichi Hayashida ◽  
Yoshikazu Nakayama
Keyword(s):  
Indium Tin Oxide ◽  
Iron Catalyst ◽  
Dispersive Medium ◽  
Chemical Vapor ◽  
Iron Compound ◽  
Iron Compounds ◽  
Coated Glass Substrate ◽  
Thermal Chemical Vapor Deposition ◽  
Catalytic Function ◽  
Density Control

We synthesized carbon tubule nanocoils by catalytic thermal chemical vapor deposition. The iron catalyst necessary in the growth of carbon nanocoils was prepared only by coating the iron compound solution on indium tin oxide–coated glass substrate. It was found that the iron compounds have the same catalytic function as iron thin film prepared by evaporation or electroplating. Furthermore, the density of the prepared carbon nanocoils could be easily controlled by changing the density of the solution of iron compounds. In addition, the poly(methylphenylsilane) proved to be an excellent dispersive medium for the iron compound in preparation of the carbon nanocoils in desired densities.

Influence of reaction parameters on the photoluminescence properties of free standing functionalized silicon nanocrystals

2010 ◽  
Vol 1260 ◽  
Author(s):  
Anoop Gupta ◽  
Hartmut Wiggers
Keyword(s):  
Optical Properties ◽  
Surface Functionalization ◽  
Silicon Nanocrystals ◽  
Organic Molecules ◽  
Surface Passivation ◽  
Light Emission ◽  
Emission Spectra ◽  
Surface Oxidation ◽  
Free Standing ◽  
The Stability

AbstractWhile silicon nanostructures acquire novel optical properties due to miniaturization, the stability of light emission is severely limited because of exciton trapping due to surface oxidation coming along with the formation of defects. Grafting of organic molecules on a hydrogen-terminated silicon surface via hydrosilylation provides a promising route to stabilize their surface against oxidation. In this communication, we report on the effect of surface passivation on the optical properties of freestanding silicon nanocrystals (Si-NCs). The surface functionalization of hydrogen-terminated Si-NCs with organic molecules was achieved via liquid phase hydrosilylation. We demonstrate that surface functionalization does not preserve the original emission of hydrogen-terminated Si-NCs. It is observed that the emission spectrum of green emitting hydrogen-terminated Si-NCs is red shifted after surface functionalization. We find that the direction of shift does not depend on the type of organic ligands and the reaction conditions, however, the amount of shift can be altered. The factors influencing the shift in the emission spectra of functionalized Si-NCs with respect to hydrogen-terminated samples are discussed.

scholarly journals Annealing Effects of Sputtered Cu2O Nanocolumns on ZnO-Coated Glass Substrate for Solar Cell Applications

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Lung-Chien Chen ◽  
Chung-Chieh Wang ◽  
Suz-Wei Lu
Keyword(s):  
Thin Films ◽  
Solar Cell ◽  
Indium Tin Oxide ◽  
Glass Substrate ◽  
Surface Structures ◽  
Oxide Glass ◽  
Coated Glass Substrate ◽  
Annealing Effects ◽  
Bilayered Structure ◽  
Indium Tin Oxide Glass

Cuprous oxide (Cu2O) films were prepared on an indium tin oxide glass substrate by radiofrequency magnetron sputtering using a high-purity Cu target. The temperature of annealing was varied to obtain Cu2O thin films with various elements, compositions, and surface structures. The p-Cu2O thin films thus formed were characterized by FESEM and XRD. After annealing at 500∘C, the bilayer structure which consisted of Cu nanoclusters on the surface of a film of Cu2O nanocolumns was observed. The Cu2O solar cell with the bilayered structure exhibited poor power conversion efficiency.

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