Pyridine-Based Conjugated Polymers: Photophysical Properties and Light- Emitting Diodes

reportActive / Technical Report | Accession Number: ADA330192 | Open PDF

Abstract:

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(s):
Epstein, A. J. ; Wang, Y. Z. ; Jessen, S. W. ; Blatchford, J. W. ; Gebler, D. D.
Author Organization(s):
OHIO STATE UNIV COLUMBUS DEPT OF PHYSICS
Descriptive Note:
Technical rept.
Supplementary Note:
DOI: 10.21236/ADA330192
Pagination:
0014

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-P279
Contract/Grant Number(s):
N00014-95-1-0302, N00014-92-J-1369
Monitor Series:
ONR
 Subject Terms
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*ELECTROLUMINESCENCE, PHYSICAL PROPERTIES, POLYMERS, ELECTRODES, PYRIDINES, LIGHT EMITTING DIODES, EXCITONS, PHASE CONJUGATION
Field(s)/Group(s):
Electrooptical and Optoelectronic Devices, Polymer Chemistry
Keyword(s):
*PYRIDINE BASED POLYMERS, *PHOTOEXCITATION, PICOSECOND TIME, POLYMER LIGHT EMITTING DEVICES
Report Date:
1997 Sep 20
Creation Date:
1997 Oct 22