Tunable Optical Polymer Systems
Abstract
This multidisciplinary university research initiative (MURI) program investigated tunable optical polymer systems suitable for large-area color-switchable coatings and devices, displays, sensors, and other electronic applications. The synthesis and properties of new electrochromic polymers are described. Electrochromic devices incorporating conjugated polymers have been fabricated and found to be durable past 100,000 cycles. Black-red, yellow-red, blue-black color-switchable all-plastic electrochromic devices were demonstrated. Fast responding, bright red light-emitting diodes based on ruthenium (II) complexes were fabricated and investigated. Efficient voltage-tunable multicolor light-emitting diodes based on bipolar blends of polyquinoline and MEH-PPV or poly(octylthiophene) were developed. New quinoline-functionalized dendrimers have been found to be efficient electron transport materials, leading to bright LEDs with high external efficiencies (2.6-6.0%). Blue LEDs with good spectral stability were developed from polyfluorene blends with high glass transition polymers. Red-bluewhite tunable LEDs with a brightness of up to 4000 cd/m2 (3.7 cd/A) and 3.1% external quantum efficiency have been developed from blends of conjugated polymers. Polarized blue LEDs have been developed from ogliofluorene with a dichronic ratio of 15-18.0 and a luminous efficiency of 0.5-5.9 cd/A. Novel chiral-nematic glass forming liquid crystals were synthesized and found to exhibit 100% selective reflection of ultraviolet, visible, and infrared light. High performance n-channel thin film transistors were developed from ladder polymer semiconductors.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 29, 2004
- Accession Number
- ADA430064
Entities
People
- Allen J. Bard
- L. J. Rothberg
- P. T. Hammond
- S. A. Jenekhe
- ShuâHsia Chen
Organizations
- University of Washington