scholarly journals Elimination of Lateral Resistance and Current Crowding in Large-Area LEDs by Composition Grading and Diffusion-Driven Charge Transport

2017 ◽  
Vol 3 (6) ◽  
pp. 1700103 ◽  
Author(s):  
Pyry Kivisaari ◽  
Iurii Kim ◽  
Sami Suihkonen ◽  
Jani Oksanen
Keyword(s):  
Charge Transport ◽  
Current Crowding ◽  
Large Area ◽  
Lateral Resistance ◽  
And Diffusion

scholarly journals A 3 W High-Voltage Single-Chip Green Light-Emitting Diode with Multiple-Cells Network

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
W. Wang ◽  
Y. Cai ◽  
Y. B. Zhang ◽  
H. J. Huang ◽  
W. Huang ◽  
...  
Keyword(s):  
High Voltage ◽  
Light Emitting Diode ◽  
Light Output ◽  
Green Light ◽  
Current Crowding ◽  
Single Chip ◽  
Light Output Power ◽  
Large Area ◽  
Light Emitting ◽  
Multiple Cells

A parallel and series network structure was introduced into the design of the high-voltage single-chip (HV-SC) light-emitting diode to inhibit the effect of current crowding and to improve the yield. Using such a design, a6.6×5 mm2large area LED chip of 24 parallel stages was demonstrated with 3 W light output power (LOP) at the current of 500 mA. The forward voltage was measured to be 83 V with the same current injection, corresponding to 3.5 V for a single stage. The LED chip’s average thermal resistance was identified to be 0.28 K/W by using infrared thermography analysis.

Molecular orientation and anisotropic charge transport in the large area thin films of regioregular Poly(3-alkylthiophenes) fabricated by ribbon-shaped FTM

2020 ◽  
Vol 81 ◽  
pp. 105687
Author(s):  
Atul S.M. Tripathi ◽  
Rakesh Kumar Gupta ◽  
Shubham Sharma ◽  
Shuichi Nagamatsu ◽  
Shyam S. Pandey
Keyword(s):  
Thin Films ◽  
Charge Transport ◽  
Molecular Orientation ◽  
Large Area ◽  
Regioregular Poly

Temperature-Dependent Charge Transport of Large-Area Molecular Junctions with PEDOT:PSS Electrodes

2020 ◽  
Vol 12 (3) ◽  
pp. 333-336
Author(s):  
Jungmoon Lim ◽  
Gahyun Ahn ◽  
Inho Jeong ◽  
Hyunwook Song
Keyword(s):  
Charge Transport ◽  
Annealing Temperature ◽  
Molecular Junctions ◽  
Electrical Characteristics ◽  
Large Area ◽  
Temperature Dependent ◽  
Interfacial Contact ◽  
End Groups ◽  
Backbone Structure ◽  
Dependent Transport

We report on the temperature-dependent transport behaviors of large-area molecular junctions fabricated with poly-(3,4-ethylene-dioxythiophene) stabilized with polystyrene sulphonic acid (PEDOT:PSS) interlayer electrodes and the archetypal benzenethiol molecules. In this study, we investigated two different benzenethiol molecules: 4-methylbenzenethiol (MBT) and 1,4-benzenedithiol (BDT), which have the identical backbone structure but different top end-groups. The charge transport through the molecular junctions was dominated by distinct interfacial contact properties between the PEDOT:PSS electrodes and the component molecules. We also observed that the electrical characteristics of the MBT junctions are influenced by the PEDOT grain size, particularly depending on the annealing temperature.

In-plane isotropic charge transport characteristics of single-crystal FETs with high mobility based on 2,6-bis(4-methoxyphenyl)anthracene: experimental cum theoretical assessment

2017 ◽  
Vol 5 (2) ◽  
pp. 370-375 ◽  
Author(s):  
Aiyuan Li ◽  
Lijia Yan ◽  
Chao He ◽  
Yanan Zhu ◽  
Dongwei Zhang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Charge Transport ◽  
High Mobility ◽  
Large Area ◽  
Theoretical Assessment

In-plane isotropic charge transport single crystal FET with mobility exceeding 15 cm2V−1s−1is obtained, the result is desirable in large-area single-crystal FET arrays.

scholarly journals Charge injection and transport properties of large area organic junctions based on aryl thin films covalently attached to a multilayer graphene electrode

2019 ◽  
Vol 1 (1) ◽  
pp. 414-420 ◽  
Author(s):  
Clément Barraud ◽  
Matthieu Lemaitre ◽  
Roméo Bonnet ◽  
Jacko Rastikian ◽  
Chloé Salhani ◽  
...  
Keyword(s):  
Thin Films ◽  
Charge Transport ◽  
Transport Properties ◽  
Charge Injection ◽  
Multilayer Graphene ◽  
Large Area ◽  
Graphene Electrode

Charge transport in graphene based organic rectifier.

scholarly journals Universal Scaling of the Charge Transport in Large-Area Molecular Junctions

Small ◽  
2011 ◽  
Vol 7 (11) ◽  
pp. 1593-1598 ◽  
Author(s):  
Auke J. Kronemeijer ◽  
Ilias Katsouras ◽  
Eek H. Huisman ◽  
Paul A. van Hal ◽  
Tom C. T. Geuns ◽  
...  
Keyword(s):  
Charge Transport ◽  
Molecular Junctions ◽  
Large Area ◽  
Universal Scaling

scholarly journals Transverse charge transport through DNA oligomers in large-area molecular junctions

Nanoscale ◽  
2013 ◽  
Vol 5 (20) ◽  
pp. 9882 ◽  
Author(s):  
Ilias Katsouras ◽  
Claudia Piliego ◽  
Paul W. M. Blom ◽  
Dago M. de Leeuw
Keyword(s):  
Charge Transport ◽  
Molecular Junctions ◽  
Large Area ◽  
Dna Oligomers

Tunneling at Organic/Metal Interfaces in Oligomer-Based Thin-Film Transistors

MRS Bulletin ◽  
1997 ◽  
Vol 22 (6) ◽  
pp. 52-56 ◽  
Author(s):  
Francis Garnier ◽  
Fayçal Kouki ◽  
Rhiad Hajlaoui ◽  
Gilles Horowitz
Keyword(s):  
Charge Transport ◽  
Organic Semiconductors ◽  
Field Effect Transistors ◽  
Substrate Surface ◽  
Three Dimensional ◽  
Amorphous State ◽  
Dimensional Structure ◽  
Conjugated Oligomers ◽  
Large Area ◽  
Strong Luminescence

Organic semiconductors have been studied since the early 1950s, and the large amount of work devoted to them has allowed a better understanding of their charge-transport properties. However owing to their very poor semiconducting characteristics, they were merely considered as exotic materials with little potential interest for applications until the late 1980s, when two significant steps simultaneously appeared in the literature. Richard Friend's group showed that light-emitting diodes could be made from a conjugated semiconducting polymer, and our laboratory showed that efficient field-effect transistors (FETs) could be realized from short-conjugated oligomers. These two results launched intensive research on these two types of organic-based devices, and the extensive work accomplished since has largely confirmed the technological pertinence of organic semiconductors, showing the promise for applications in flexible and large-area electronics. Two categories of organic semiconductors are actually under development: (1) conjugated polymer-based ones whose amorphous state is favorable to strong luminescence and (2) conjugated oligomer-based ones, in which charge-transport efficiency is directly related to the long-range packing of molecules in the semiconducting film. In fact conjugated oligomers can be said to be forming molecular polycrystals whose electrical properties are essentially controlled by molecular order. Thus performance of sexithiophene-based FETs has been improved by a factor of nearly 50 by controlling the molecular ordering in the evaporated film, from a disordered three-dimensional structure to a well-ordered two-dimensional organization where all the molecules stack along a packing axis nearly parallel to the substrate surface.

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