Polymers for Use in Polymeric Light-Emitting Diodes: Structure-Property Relationships

2006 ◽  
pp. 215-248
Keyword(s):  
Light Emitting Diodes ◽  
Structure Property ◽  
Light Emitting ◽  
Structure Property Relationships

Recent progress in hot exciton materials for organic light-emitting diodes

2021 ◽  
Author(s):  
Yuwei Xu ◽  
Pei Xu ◽  
Dehua Hu ◽  
Yuguang Ma
Keyword(s):  
Recent Progress ◽  
Development Process ◽  
Light Emitting Diodes ◽  
Molecular Design ◽  
Organic Light Emitting Diodes ◽  
Structure Property ◽  
Light Emitting ◽  
Structure Property Relationships ◽  
Organic Light ◽  
Material Systems

The development process, molecular design principles, material systems, structure–property relationships and OLED applications of hot exciton materials are comprehensively summarized.

Catalyst Halogenation Enables Rapid and Efficient Polymerizations with Visible to Near-Infrared Light

2020 ◽  
Author(s):  
Alex Stafford ◽  
Dowon Ahn ◽  
Emily Raulerson ◽  
Kun-You Chung ◽  
Kaihong Sun ◽  
...  
Keyword(s):  
Near Infrared ◽  
Transient Absorption ◽  
Reaction Times ◽  
Infrared Light ◽  
Structure Property ◽  
Light Emitting ◽  
Structure Property Relationships ◽  
Nir Light ◽  
Light Intensities ◽  
Emission Quenching

Driving rapid polymerizations with visible to near-infrared (NIR) light will enable nascent technologies in the emerging fields of bio- and composite-printing. However, current photopolymerization strategies are limited by long reaction times, high light intensities, and/or large catalyst loadings. Improving efficiency remains elusive without a comprehensive, mechanistic evaluation of photocatalysis to better understand how composition relates to polymerization metrics. With this objective in mind, a series of methine- and aza-bridged boron dipyrromethene (BODIPY) derivatives were synthesized and systematically characterized to elucidate key structure-property relationships that facilitate efficient photopolymerization driven by visible to NIR light. For both BODIPY scaffolds, halogenation was shown as a general method to increase polymerization rate, quantitatively characterized using a custom real-time infrared spectroscopy setup. Furthermore, a combination of steady-state emission quenching experiments, electronic structure calculations, and ultrafast transient absorption revealed that efficient intersystem crossing to the lowest excited triplet state upon halogenation was a key mechanistic step to achieving rapid photopolymerization reactions. Unprecedented polymerization rates were achieved with extremely low light intensities (< 1 mW/cm<sup>2</sup>) and catalyst loadings (< 50 μM), exemplified by reaction completion within 60 seconds of irradiation using green, red, and NIR light-emitting diodes.

Manipulation of electron deficiency of δ-carboline derivatives as bipolar hosts for blue phosphorescent organic light-emitting diodes with high efficiency at 1000 cd m−2

2016 ◽  
Vol 4 (19) ◽  
pp. 4226-4235 ◽  
Author(s):  
Zhen Zhang ◽  
Jingwei Xie ◽  
Zixing Wang ◽  
Bowen Shen ◽  
Hedan Wang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Structure Property ◽  
Light Emitting ◽  
Organic Light ◽  
Structure Property Relationship ◽  
Electron Deficiency ◽  
Relationship Of ◽  
Blue Phosphorescent

Structure–property relationship of pyridine-modified δ-carboline derivatives as bipolar hosts for highly efficient blue OLED.

Structure−Property Relationships in Light-Emitting Polymers:  Optical, Electrochemical, and Thermal Studies

2000 ◽  
Vol 33 (20) ◽  
pp. 7426-7430 ◽  
Author(s):  
Min Zheng ◽  
Ananda M. Sarker ◽  
E. Elif Gürel ◽  
Paul M. Lahti ◽  
Frank E. Karasz
Keyword(s):  
Thermal Studies ◽  
Structure Property ◽  
Light Emitting ◽  
Structure Property Relationships

Synthesis and Structure−Property Relationships of Soluble Rigid−Flexible Copolyethers Containing Blue and Yellow Light Emitting Units

2000 ◽  
Vol 12 (10) ◽  
pp. 2957-2963 ◽  
Author(s):  
F. D. Konstandakopoulou ◽  
S. M. Iconomopoulou ◽  
K. G. Gravalos ◽  
J. K. Kallitsis
Keyword(s):  
Structure Property ◽  
Yellow Light ◽  
Light Emitting ◽  
Structure Property Relationships

scholarly journals Catalyst Halogenation Enables Rapid and Efficient Polymerizations with Visible to Near-Infrared Light

2020 ◽  
Author(s):  
Alex Stafford ◽  
Dowon Ahn ◽  
Emily Raulerson ◽  
Kun-You Chung ◽  
Kaihong Sun ◽  
...  
Keyword(s):  
Near Infrared ◽  
Transient Absorption ◽  
Reaction Times ◽  
Infrared Light ◽  
Structure Property ◽  
Light Emitting ◽  
Structure Property Relationships ◽  
Nir Light ◽  
Light Intensities ◽  
Emission Quenching

Driving rapid polymerizations with visible to near-infrared (NIR) light will enable nascent technologies in the emerging fields of bio- and composite-printing. However, current photopolymerization strategies are limited by long reaction times, high light intensities, and/or large catalyst loadings. Improving efficiency remains elusive without a comprehensive, mechanistic evaluation of photocatalysis to better understand how composition relates to polymerization metrics. With this objective in mind, a series of methine- and aza-bridged boron dipyrromethene (BODIPY) derivatives were synthesized and systematically characterized to elucidate key structure-property relationships that facilitate efficient photopolymerization driven by visible to NIR light. For both BODIPY scaffolds, halogenation was shown as a general method to increase polymerization rate, quantitatively characterized using a custom real-time infrared spectroscopy setup. Furthermore, a combination of steady-state emission quenching experiments, electronic structure calculations, and ultrafast transient absorption revealed that efficient intersystem crossing to the lowest excited triplet state upon halogenation was a key mechanistic step to achieving rapid photopolymerization reactions. Unprecedented polymerization rates were achieved with extremely low light intensities (< 1 mW/cm<sup>2</sup>) and catalyst loadings (< 50 μM), exemplified by reaction completion within 60 seconds of irradiation using green, red, and NIR light-emitting diodes.

Synthesis and structure-property relations of polymers for light emitting diodes based on isolated chromophore units

1994 ◽  
Vol 195 (6) ◽  
pp. 2023-2037 ◽  
Author(s):  
Heinke von Seggern ◽  
Patrick Schmidt-Winkel ◽  
Chi Zhang ◽  
Hans-Werner Schmidt
Keyword(s):  
Light Emitting Diodes ◽  
Structure Property ◽  
Light Emitting ◽  
Property Relations

High Tg small-molecule phenanthroline derivatives as a potential universal hole-blocking layer for high power-efficiency and stable organic light-emitting diodes

2017 ◽  
Vol 5 (9) ◽  
pp. 2329-2336 ◽  
Author(s):  
Xin-Feng Wei ◽  
Wan-Yi Tan ◽  
Jian-Hua Zou ◽  
Qing-Xun Guo ◽  
Dong-Yu Gao ◽  
...  
Keyword(s):  
Power Efficiency ◽  
Organic Light Emitting Diodes ◽  
Blocking Layer ◽  
Structure Property ◽  
Light Emitting ◽  
High Performing ◽  
Structure Property Relationships ◽  
Organic Light ◽  
Hole Blocking Layer ◽  
High Power Efficiency

The molecular structure–property relationships are presented for new series of high-performing hole-blocking phenanthroline compounds.

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