Photoluminescence In Pyridine Based Polymers Role Of Aggregates
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Total Pages | : 0 |
Release | : 1997 |
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Download Photoluminescence in Pyridine-Based Polymers: Role of Aggregates Book in PDF, Epub and Kindle
We present a study of the morphology dependence of the photoluminescence (PL) properties of the pyridine-based polymers poly(p-pyridine), and poly(p-pyridyl) vinylene p-phenylene vinylene) (PPyVPV). The photoluminescence of solution samples is characterized by high quantum efficiency (> 70% in PPyVPV), weak coupling to vibrational modes (Huang-Rhys parameter 0.5) and a single-exponential decay (radiative lifetime 1 ns). On the other hand, film samples display strongly redshifted, featureless emission with low quantum yield (
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Release | : 1998 |
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Download การเสริมสร้างพลังอํานาจในงานและการคงอยู่ในงานของพยาบาลวิชาชีพโรงพยาบาลสมเด็จพระยุพราช Book in PDF, Epub and Kindle
Author | : James W. Blatchford |
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Total Pages | : 476 |
Release | : 1996 |
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Download Dynamics of Photoluminescence and Photoinduced Absorption in Pyridine-based Conjugated Polymers Book in PDF, Epub and Kindle
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Total Pages | : 14 |
Release | : 1997 |
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Download Pyridine-Based Conjugated Polymers: Photophysical Properties and Light- Emitting Diodes Book in PDF, Epub and Kindle
We study the photophysical properties of the pyridine-based polymers poly (p-pyridyl vinylene) (PPyV) and poly (p-pyridine) (PPy). The primary photoexcitations in the pyridine-based polymers are singlet excitons. We observe direct intersystem crossing (ISC) on picosecond timescales with the volume density of triplet excitons varying with the sample morphology (film or powder). These effects are demonstrated clearly by examining the millisecond photoinduced absorption characteristics of powder and film forms of PPyV. The pyridine-based polymers have been shown to be promising candidates for polymer light-emitting devices both the 'conventional ' diode device and symmetrically configured ac light-emitting (SCALE) device. Here we examine the role of 'insulating' layers and their interfaces with the emitting layer and electrodes in the SCALE device operation with emphasis on the central role of the polymer-polymer interfaces.
Author | : R. Farchioni |
Publisher | : Springer Science & Business Media |
Total Pages | : 457 |
Release | : 2013-11-21 |
Genre | : Technology & Engineering |
ISBN | : 3642564259 |
Download Organic Electronic Materials Book in PDF, Epub and Kindle
This book brings together selected contributions both on the fundamental information on the physics and chemistry of these materials, new physical ideas and decisive experiments. It constitutes both an insightful treatise and a handy reference for specialists and graduate students working in solid state physics and chemistry, material science and related fields.
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Total Pages | : 436 |
Release | : 1997 |
Genre | : Electroluminescent devices |
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Download Organic Light-emitting Materials and Devices Book in PDF, Epub and Kindle
Author | : Z. V. Vardeny |
Publisher | : SPIE-International Society for Optical Engineering |
Total Pages | : 566 |
Release | : 1997 |
Genre | : Science |
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Download Optical Probes of Conjugated Polymers Book in PDF, Epub and Kindle
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Total Pages | : 2626 |
Release | : 2002 |
Genre | : Chemistry |
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Download Chemical Abstracts Book in PDF, Epub and Kindle
Author | : American Chemical Society. Division of Polymer Chemistry |
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Total Pages | : 764 |
Release | : 1998 |
Genre | : Chemistry |
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Download Papers Presented at the ... Meeting Book in PDF, Epub and Kindle
Author | : Raquel Aparecida Domingues |
Publisher | : CRC Press |
Total Pages | : 225 |
Release | : 2021-06-25 |
Genre | : Science |
ISBN | : 1000727963 |
Download Semiconducting Polymers Book in PDF, Epub and Kindle
Semiconducting polymers are of great interest for applications in electroluminescent devices, solar cells, batteries, and diodes. This volume provides a thorough introduction to the basic concepts of the photophysics of semiconducting polymers as well as a description of the principal polymerization methods for luminescent polymers. Divided into two main sections, the book first introduces the advances made in polymer synthesis and then goes on to focus on the photophysics aspects, also exploring how new advances in the area of controlled syntheses of semiconducting polymers are applied. An understanding of the photophysics process in this kind of material requires some knowledge of many different terms in this field, so a chapter on the basic concepts is included. The process that occurs in semiconducting polymers spans time scales that are unimaginably fast, sometimes less than a picosecond. To appreciate this extraordinary scale, it is necessary to learn a range of vocabularies and concepts that stretch from the basic concepts of photophysics to modern applications, such as electroluminescent devices, solar cells, batteries, and diodes. This book provides a starting point for a broadly based understanding of photophysics concepts applied in understanding semiconducting polymers, incorporating critical ideas from across the scientific spectrum.