Steady State Photoconductivity in Conjugated Polymers

2001 ◽  
Vol 665 ◽  
Author(s):  
C. D. Sitch ◽  
D. P. Halliday ◽  
A. P. Monkman
Keyword(s):  
Steady State ◽  
Conjugated Polymers ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Bulk Polymer ◽  
Au Electrode ◽  
Ito Electrode

ABSTRACTVisible and ultraviolet photoconductivity (PC) measurements have been performed on thick (7[.proportional]m) and thin (170nm) films of poly[2-methoxy, 5 ethyl (2' hexyloxy) paraphenylenevinylene] (MEH-PPV) sandwiched between indium tin oxide (ITO) and semitransparent gold (Au) electrodes. PC spectra were obtained for samples under different bias polarities and for illumination through the ITO electrode and through the Au electrode. The results obtained indicate that the absorbed photons form excitons that dissociate extrinsically at or near the electrodes to form hole polarons or intrinsically at higher photon energies in the bulk polymer.

scholarly journals Performance of GaN-Based LEDs with Nanopatterned Indium Tin Oxide Electrode

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Zhanxu Chen ◽  
Wenjie Liu ◽  
Wei Wan ◽  
Gengyan Chen ◽  
Yongzhu Chen ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Ohmic Contacts ◽  
Three Dimensional ◽  
Light Output ◽  
Light Extraction Efficiency ◽  
Experimental Result ◽  
Indium Tin Oxide Electrode ◽  
Light Emitting ◽  
Ito Electrode

The indium tin oxide (ITO) has been widely applied in light emitting diodes (LEDs) as the transparent current spreading layer. In this work, the performance of GaN-based blue light LEDs with nanopatterned ITO electrode is investigated. Periodic nanopillar ITO arrays are fabricated by inductive coupled plasma etching with the mask of polystyrene nanosphere. The light extraction efficiency (LEE) of LEDs can be improved by nanopatterned ITO ohmic contacts. The light output intensity of the fabricated LEDs with nanopatterned ITO electrode is 17% higher than that of the conventional LEDs at an injection current of 100 mA. Three-dimensional finite difference time domain simulation matches well with the experimental result. This method may serve as a practical approach to improving the LEE of the LEDs.

Characterization of electrocatalytic proton reduction and surface adsorption of platinum nanoparticles supported by a polymeric stabilizer on an ITO electrode

2022 ◽  
Author(s):  
Yuta Tsubonouchi ◽  
Masashi Kajita ◽  
Taichi Hayasaka ◽  
Hamada S. A. Mandour ◽  
Mohamed R Berber ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Platinum Nanoparticles ◽  
Colloidal Solution ◽  
Surface Adsorption ◽  
Chemical Adsorption ◽  
Proton Reduction ◽  
Ito Electrode ◽  
Polymeric Stabilizer

Platinum nanoparticles (PAA-Pt) stabilized by polyacrylic acid (PAA) of a polymeric stabilizer were adsorbed on an indium tin oxide (ITO) surface from their colloidal solution due to the chemical adsorption...

scholarly journals Electrochemical Impedance Characterization of Cell Growth on Reduced Graphene Oxide–Gold Nanoparticles Electrodeposited on Indium Tin Oxide Electrodes

2019 ◽  
Vol 9 (2) ◽  
pp. 326 ◽  
Author(s):  
Somasekhar Chinnadayyala ◽  
Jinsoo Park ◽  
Yonghyun Choi ◽  
Jae-Hee Han ◽  
Ajay Yagati ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Cell Growth ◽  
Reduced Graphene Oxide ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Electrochemical Impedance ◽  
Hek293 Cells ◽  
Ito Electrode ◽  
Reduced Graphene

The improved binding ability of graphene–nanoparticle composites to proteins or molecules can be utilized to develop new cell-based assays. In this study, we fabricated reduced graphene oxide–gold nanoparticles (rGO-AuNP) electrodeposited onto a transparent indium tin oxide (ITO) electrode and investigated the feasibility of the electrochemical impedance monitoring of cell growth. The electrodeposition of rGO–AuNP on the ITO was optically and electrochemically characterized in comparison to bare, rGO-, and AuNP-deposited electrodes. The cell growth on the rGO–AuNP/ITO electrode was analyzed via electrochemical impedance measurement together with the microscopic observation of HEK293 cells transfected with a green fluorescent protein expression vector. The results showed that rGO–AuNP was biocompatible and induced an increase in cell adherence to the electrode when compared to the bare, AuNP-, or rGO-deposited ITO electrode. At 54 h cultivation, the average and standard deviation of the saturated normalized impedance magnitude of the rGO–AuNP/ITO electrode was 3.44 ± 0.16, while the value of the bare, AuNP-, and rGO-deposited ITO electrode was 2.48 ± 0.15, 2.61 ± 0.18, and 3.01 ± 0.25, respectively. The higher saturated value of the cell impedance indicates that the impedimetric cell-based assay has a broader measurement range. Thus, the rGO–AuNP/ITO electrode can be utilized for label-free and real-time impedimetric cell-based assays with wider dynamic range.

Preparation of Electro-codeposited Film Consisting of Phthalocyanine and Perylene Derivatives

1999 ◽  
Vol 03 (04) ◽  
pp. 310-315 ◽  
Author(s):  
TERUHISA KUDO ◽  
MUTSUMI KIMURA ◽  
KENJI HANABUSA ◽  
HIROFUSA SHIRAI
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Cathodic Polarization ◽  
Supporting Electrolyte ◽  
Glass Electrode ◽  
Aluminum Electrode ◽  
Cyclic Voltammogram ◽  
Coated Glass ◽  
Ito Electrode ◽  
Perylene Derivatives

A novel electro-codeposited film was homogeneously obtained on an indium tin oxide (ITO)-coated glass electrode by cathodic polarization of a solution of 2,9,16,23-tetracarboxyphthalocyaninatomagnesium(II) ( Mg II taPc ), N,N′-4-hydroxyphenyl-3,4,9,10-perylenetetra-carboxylic-diimide (4-hph-PTC) and ZnCl 2 as supporting electrolyte in N,N-dimethylformamide (DMF). The cyclic voltammogram for the codeposited film showed a reduction at −0.8 V vs SCE which was assigned to the reduction of Mg II taPc and one at −1.5 V vs SCE which was assigned to the reduction of 4-hph-PTC. A device based on the codeposited film was prepared by the formation of an aluminum electrode on the codeposited film. The device exhibited rectification and photoconduction. The results suggest that the codeposited film forms a number of p-n junction interfaces which are distributed on the ITO electrode.

scholarly journals A Novel Transparent pH Sensor Based on a Nanostructured ITO Electrode Coated with [3,3′-Co(1,2-C2B9H11)2]-Doped Poly(pyrrole)

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 869 ◽  
Author(s):  
Raquel Pruna ◽  
Francisco Palacio ◽  
Isabel Fuentes ◽  
Clara Viñas ◽  
Francesc Teixidor ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Biomedical Applications ◽  
Chemical Resistance ◽  
Point Of Care ◽  
Low Cost ◽  
Ph Sensor ◽  
Ito Electrode ◽  
Sensitive Electrode

A novel transparent and nanostructured ion-sensitive electrode based on indium tin oxide (ITO) coated with cobaltbis(dicarbollide)-doped poly(pyrrole) (PPy) is presented in this work. This metallacarborane-doped PPy was used as conducting polymer due to its high stability and chemical resistance. The ion-sensitive electrode was coupled to a miniaturized and low-cost potentiostat, in a final autonomous kit for potentiometric determination of pH. Qualitative calibration of the system revealed Nernstian behavior, resulting promising for novel point-of-care biomedical applications.

scholarly journals Boosting the performance of resistive switching memory with a transparent ITO electrode using supercritical fluid nitridation

RSC Advances ◽  
2017 ◽  
Vol 7 (19) ◽  
pp. 11585-11590 ◽  
Author(s):  
Cong Ye ◽  
Jia-Ji Wu ◽  
Chih-Hung Pan ◽  
Tsung-Ming Tsai ◽  
Kuan-Chang Chang ◽  
...  
Keyword(s):  
Supercritical Fluid ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Hafnium Oxide ◽  
Random Access ◽  
Random Access Memory ◽  
Resistive Random Access Memory ◽  
Access Memory ◽  
Resistive Switching Memory ◽  
Ito Electrode

A low temperature supercritical fluid nitridation (SCF-nitridation) technique was investigated to dope nitrogen into a indium-tin-oxide (ITO) electrode to boost the performance of hafnium oxide resistive random access memory (RRAM).

A cobalt nanoparticle ion-implantation-modified indium tin oxide electrode for direct electrocatalytic oxidation of methanol in alkaline media

RSC Advances ◽  
2015 ◽  
Vol 5 (96) ◽  
pp. 79178-79183 ◽  
Author(s):  
Wen Su ◽  
Yingyi Fu ◽  
Tong Wang ◽  
Yanan Yu ◽  
Jingbo Hu
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Alkaline Media ◽  
Oxide Electrode ◽  
Sem Images ◽  
Indium Tin Oxide Electrode ◽  
Oxidation Of Methanol ◽  
Ito Electrode ◽  
Direct Methanol ◽  
Cobalt Nanoparticle

SEM images of the CoNPs/ITO electrode (A), and the CoNPs/ITO electrode exhibits a good electrocatalytic ability and stability towards direct methanol oxidation in alkaline medium (B, C and D).

Study on the Panel Fabrication for the Field Emission Display with Symmetrical Electrode Stripe

2011 ◽  
Vol 142 ◽  
pp. 58-61
Author(s):  
Yan Xia Ma
Keyword(s):  
Field Emission ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Emission Characteristics ◽  
Plate Surface ◽  
Insulation Layer ◽  
Field Emission Display ◽  
Ito Film ◽  
Ito Electrode ◽  
Substrate Plate

Using carbon nanotubes as cold cathode material, the panel fabrication for the diode field emission display (FED) with symmetrical electrode stripe was studied. The indium tin oxide (ITO) film was used as conduction electrode on the substrate plate surface, and the precise photolithography method was adopted as the high effective fabrication process. For the both cathode and anode plate, the whole ITO film would be etched in the bar form, and the divided bar ITO stripe would be arranged symmetrically. On the cathode plate surface, the printed silver slurry was used to form the cathode extension lines and the cathode insulation layer was formed with the sintered insulation slurry. Whether for the cathode ITO electrodes or for the anode ITO electrodes, the length of bar ITO electrode become small, which would be beneficial for reducing the panel working-voltage. The FED panel was sealed and measured, which possessed good field emission characteristics.

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