Bipolar Copolymers as Host for Electroluminescent Devices:  Effects of Molecular Structure on Film Morphology and Device Performance

2007 ◽  
Vol 40 (23) ◽  
pp. 8156-8161 ◽  
Author(s):  
Biwu Ma ◽  
Bumjoon J. Kim ◽  
Lan Deng ◽  
Daniel A. Poulsen ◽  
Mark E. Thompson ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Device Performance ◽  
Film Morphology ◽  
Electroluminescent Devices

TiO2:Ce/CeO2 High Performance Insulators For Thin Film Electroluminescent Devices

1996 ◽  
Vol 424 ◽  
Author(s):  
A. R. Bally ◽  
K. Prasad ◽  
R. Sanjinés ◽  
P. E. Schmid ◽  
F. Lévy ◽  
...  
Keyword(s):  
High Performance ◽  
Large Range ◽  
Device Performance ◽  
Thermal Treatments ◽  
High Permittivity ◽  
Electroluminescent Devices ◽  
Device Efficiency ◽  
Notable Increase ◽  
Cerium Doping ◽  
Titanium Dioxide Thin Films

AbstractThe electrical properties of titanium dioxide thin films have been stabilised by cerium doping. These films have a high permittivity between 35 to 45 and withstand 650°C. Multilayer TiO2:Ce/CeO2 insulators have been fabricated. The breakdown voltage is increased by a factor 10 with a modest decrease in the permittivity (30 – 35 instead of 35 – 45).Electroluminescent devices (ELDs) with a classical ZnS:Mn phosphor have been prepared using TiO2:Ce as the first insulator and a TiO2:Ce/CeO2 multilayer as the second insulator. Compared with a standard ELD based on Y2O3 insulators, devices with the new insulators show a significant decrease of the threshold voltage along with a notable increase of the brightness. An important increase is also achieved in the total device efficiency which is maintained over a large range of brightness and transferred charge. Consequences of rapid thermal annealing and conventional thermal treatments on device performance have also been investigated.

Effect of dielectric/organic interface properties on the performance of the organic thin film transistors

2013 ◽  
Vol 1501 ◽  
Author(s):  
Ronak Rahimi ◽  
D. Korakakis
Keyword(s):  
Molecular Structure ◽  
Thin Film ◽  
Thin Film Transistors ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Organic Thin Film Transistors ◽  
Device Performance ◽  
Electrical Characteristics ◽  
Organic Thin Film ◽  
Organic Layers

ABSTRACTIn order to manufacture organic electronic devices with high performance, more detailed studies of the structure and the morphology of the organic materials as well as the underlying physical charge transport mechanisms are warranted. For instance, high efficiency organic thin film transistors (OTFTs) require materials with high charge carrier mobility [1, 2]. The parameters that determine the charge carrier mobility of the device include the structure of the first organic layer at the organic-dielectric interface as well as the morphology and the structural order of the other organic layers. Therefore, fundamental questions about structural properties of organic materials should be answered in order to optimize device performance [2-4].In this work, several bilayer structures of LiF/PTCDI-C8 and LiF/pentacene were prepared and their morphology and molecular structure were characterized using X-ray reflectivity (XRR) technique. In order to study the effects of the films’ structures and dielectric/organic interfacial properties on the device performance, OTFTs based on these bilayers were fabricated and characterized. It has been observed that PTCDI-C8 thin films have higher molecular packing in the LiF/PTCDI-C8 bilayer structure, which results in superior electrical characteristics for OTFTs based on this organic material. Devices with LiF/PTCDI-C8 bilayer exhibit about one order of magnitude higher output current (Ids) at a constant drain-source voltage (Vds) compared to the devices with LiF/pentacene bilayer. The observed differences in the electrical characteristics of these devices can be attributed to the effects of the dielectric/organic interface and the molecular structure of the organic layers.

Organic Semiconductors Derived from Dinaphtho-Fused s-Indacenes: How Molecular Structure and Film Morphology Influence Thin-Film Transistor Performance

2019 ◽  
Vol 31 (17) ◽  
pp. 6962-6970 ◽  
Author(s):  
Andrew M. Zeidell ◽  
Laura Jennings ◽  
Conerd K. Frederickson ◽  
Qianxiang Ai ◽  
Justin J. Dressler ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Thin Film ◽  
Organic Semiconductors ◽  
Thin Film Transistor ◽  
Film Morphology ◽  
Morphology Influence

Self-host heteroleptic green iridium dendrimers: achieving efficient non-doped device performance based on a simple molecular structure

2011 ◽  
Vol 47 (33) ◽  
pp. 9519 ◽  
Author(s):  
Lingcheng Chen ◽  
Zhihua Ma ◽  
Junqiao Ding ◽  
Lixiang Wang ◽  
Xiabin Jing ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Device Performance

Altering the Position of Phenyl Substitution to Adjust Film Morphology and Memory Device Performance

2015 ◽  
Vol 10 (7) ◽  
pp. 1474-1479 ◽  
Author(s):  
Qianhao Zhou ◽  
Rongcheng Bo ◽  
Jinghui He ◽  
Hao Zhuang ◽  
Hua Li ◽  
...  
Keyword(s):  
Memory Device ◽  
Device Performance ◽  
Film Morphology

Synthesis and Transistor Properties of Asymmetric Oligothiophenes: Relationship between Molecular Structure and Device Performance

2013 ◽  
Vol 19 (42) ◽  
pp. 14052-14060 ◽  
Author(s):  
Tae Kyu An ◽  
Sang Hun Jang ◽  
Seul-Ong Kim ◽  
Jaeyoung Jang ◽  
Jihun Hwang ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Device Performance
Sign in / Sign up

Export Citation Format

Share Document