Supramolecular Assembly Strategies Using Alternate Adsorption of Polyelectrolytes: Applications in Pled And Lc Display Devices

ABSTRACTWe present work on the modification, processing, and analysis of ultrathin films for display devices primarily using the supramolecular assembly strategy. This involves the use of various molecular assembly techniques (organic, polymer, metal) in which layer order and functionality is achieved at defined length scales approaching that of ultrathin films (a few to several hundred nm thicknesses). The use of alternate polyelectrolyte deposition (APD) is primarily investigated in ultrathin films that have significance in the fabrication of display devices. The first application involves modifying a polymer light emitting diode (PLED) device fabricated using the ITO/MEH-PPV/Ca protocol with polyaniline derivatives. The second is the use of the “command layer” amplification concept and photo-induced alignment using polarized light with ultrathin films of azo dye/polyelectrolytes in a hybrid liquid crystal (LC) cell configuration. Both strategies rely on the use of surface sensitive spectroscopic and microscopic techniques to correlate device performance with layer ordering at the molecular level. The concept of functional ultrathin layers for device fabrication and modification is emphasized.

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Progress and Challenges in Commercialization of Organic Electronics

MRS Bulletin ◽

10.1557/mrs2008.149 ◽

2008 ◽

Vol 33 (7) ◽

pp. 653-662 ◽

Cited By ~ 85

Author(s):

Yueh-Lin Loo ◽

Iain McCulloch

Keyword(s):

Organic Electronics ◽

Light Emitting Diode ◽

Device Fabrication ◽

Organic Photovoltaic ◽

Organic Transistors ◽

Light Emitting ◽

Organic Light Emitting Diode ◽

Performance Requirements ◽

Organic Transistor ◽

Organic Light

AbstractThe field of organic electronics is entering its commercial phase. The recent market introduction of the first prototypes based on organic transistors fabricated from solution is set to augment the existing market presence of organic light-emitting diode applications. Organic photovoltaic products are not far behind. In this article, we provide a brief overview of these devices, with our main focus being organic transistor applications. In particular, we examine some of the key performance requirements for working devices. We also review some of the important advances in semiconductor design and device fabrication techniques and discuss some of the technical challenges that remain in the optimization of next-generation products.

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Reduction of Reflected Light On Fluorescence Emission for Indocyanine Green

Journal of Engineering and Science in Medical Diagnostics and Therapy ◽

10.1115/1.4052945 ◽

2021 ◽

Author(s):

So Yoon Kwon ◽

Ki-Cheol Yoon ◽

Kwang Gi Kim

Keyword(s):

Blood Vessel ◽

Indocyanine Green ◽

Blood Vessels ◽

Light Emitting Diode ◽

Polarized Light ◽

Fluorescence Emission ◽

Light Reflection ◽

Light Emitting ◽

Surgical Microscope ◽

Reflected Light

Abstract Inside the brain tumor, the blood vessels are intricately composed, and the tumors and blood vessels are similar in color. Therefore, when observing tumors and blood vessels with the naked eye or a surgical microscope, it is difficult to distinguish between tumors and blood vessels. Fluorescence staining with indocyanine green (ICG) is performed to distinguish between brain tumors and blood vessels using a surgical microscope. However, when observing the blood circulation state of a tumor or blood vessel through a surgical microscope, light reflection occurs from the camera. In the process of observing the state of the blood vessel, due to the occurrence of light reflection, an obstruction phenomenon in which the observation field is blocked by the blood vessel of the object to be observed occurs. Therefore, it is difficult to diagnose the vascular condition. In this experiment, the 780nm light-emitting diode (LED) was irradiated to the ICG phantom, and then, when the fluorescence expression image was observed, the polarizing filter such as circular polarized light (CPL) filter and linear polarized light (LPL) filter were inserted into the camera and the reflected light was reduced. Therefore, it is possible to reduce the reflected light from the fluorescence expression image by using a polarizing filter, and it is expected to be applicable to surgery and diagnostic fields of cancer such as surgery.

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Investigation of Polarized Light Emitting Diode

NATO Science for Peace and Security Series B: Physics and Biophysics - Nano-Structures for Optics and Photonics ◽

10.1007/978-94-017-9133-5_41 ◽

2014 ◽

pp. 495-495

Author(s):

Tibor Gál ◽

S. Örs ◽

P. Koppa

Keyword(s):

Light Emitting Diode ◽

Polarized Light ◽

Light Emitting

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Full-Color Fluorescent Display Devices Using a Near-UV Light-Emitting Diode

Japanese Journal of Applied Physics ◽

10.1143/jjap.35.l838 ◽

1996 ◽

Vol 35 (Part 2, No. 7A) ◽

pp. L838-L839 ◽

Cited By ~ 120

Author(s):

Yuichi Sato ◽

Nobuyuki Takahashi ◽

Susumu Sato

Keyword(s):

Uv Light ◽

Light Emitting Diode ◽

Light Emitting ◽

Display Devices ◽

Full Color

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Spin-Polarized Light-Emitting Diode Based on an Organic Bipolar Spin Valve

Science ◽

10.1126/science.1223444 ◽

2012 ◽

Vol 337 (6091) ◽

pp. 204-209 ◽

Cited By ~ 164

Author(s):

T. D. Nguyen ◽

E. Ehrenfreund ◽

Z. V. Vardeny

Keyword(s):

Light Emitting Diode ◽

Spin Valve ◽

Polarized Light ◽

Light Emitting ◽

Spin Polarized

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A hybrid light source with integrated inorganic light-emitting diode and organic polymer distributed feedback grating

Nanotechnology ◽

10.1088/0957-4484/19/19/195202 ◽

2008 ◽

Vol 19 (19) ◽

pp. 195202 ◽

Cited By ~ 2

Author(s):

Bayram Butun ◽

Koray Aydin ◽

Erkin Ulker ◽

Stéphanie Cheylan ◽

Gonçal Badenes ◽

...

Keyword(s):

Light Source ◽

Light Emitting Diode ◽

Distributed Feedback ◽

Organic Polymer ◽

Light Emitting

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Effect of Polarized Light Emitting Diode Irradiation on Wound Healing

Journal of Trauma and Acute Care Surgery ◽

10.1097/ta.0b013e318187ad02 ◽

2009 ◽

Vol 67 (5) ◽

pp. 1073-1079 ◽

Cited By ~ 18

Author(s):

Kaoru Tada ◽

Kazuo Ikeda ◽

Katsuro Tomita

Keyword(s):

Wound Healing ◽

Light Emitting Diode ◽

Polarized Light ◽

Light Emitting

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Energy-efficient secondary power supply source for light-emitting diode display devices

2011 International Conference and Seminar on Micro/Nanotechnologies and Electron Devices Proceedings ◽

10.1109/edm.2011.6006986 ◽

2011 ◽

Author(s):

Vadim D. Khrenov ◽

Igor I. Savin

Keyword(s):

Power Supply ◽

Energy Efficient ◽

Light Emitting Diode ◽

Supply Source ◽

Light Emitting ◽

Display Devices ◽

Power Supply Source ◽

Secondary Power

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White light emitting diode based on purely organic fluorescent to modern thermally activated delayed fluorescence (TADF) and perovskite materials

Nano Convergence ◽

10.1186/s40580-019-0201-6 ◽

2019 ◽

Vol 6 (1) ◽

Cited By ~ 6

Author(s):

Dipjyoti Das ◽

Peddaboodi Gopikrishna ◽

Debasish Barman ◽

Ramesh Babu Yathirajula ◽

Parameswar Krishnan Iyer

Keyword(s):

White Light ◽

Light Emitting Diode ◽

Solution Process ◽

Delayed Fluorescence ◽

Organic Polymer ◽

Modern Concept ◽

Thermally Activated Delayed Fluorescence ◽

Light Emitting ◽

Thermally Activated ◽

Synthesis Strategy

Abstract White organic/polymer light emitting diode (WOLED/WPLED) processed from solution has attracted significant research interest in recent years due to their low device production cost, device flexibility, easy fabrication over large area including roll to roll and ability to print in various designs and shapes providing enormous design possibilities. Although WOLEDs fabricated using solution process lack their thermally evaporated counterparts in terms of device efficiency, remarkable progress has been made in this regard in recent years by utilizing new materials and device structures. In the present review, we have summarized and extrapolated an excellent association of old and modern concept of cost-effective materials and device structure for realization of white light. In particular, this article demonstrated and focused on design, and development of novel synthesis strategy, mechanistic insights and device engineering for solution process low cost WOLEDs device. Herein, an overview of the prevailing routes towards white light emitting devices (WLEDs) and corresponding materials used, including polymer based WLED, small molecules emitters based thermally activated delayed fluorescence (TADF), perovskite light-emitting diodes (PeLEDs) and hybrid materials based LEDs, color down-converting coatings with corresponding best efficiencies ever realized. We presume that this exhaustive review on WLEDs will offer a broad overview of the latest developments on white SSL and stonework the approach en route for innovations in the immediate future.

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