Study of polymer-electrode interfaces in polymer light-emitting diodes using electrical impedance spectroscopy

2002 ◽  
Vol 734 ◽  
Author(s):  
A. van Dijken ◽  
I.N. Hulea ◽  
H.B. Brom ◽  
K. Brunner
Keyword(s):  
Impedance Spectroscopy ◽  
Double Layer ◽  
Electrical Impedance ◽  
Light Emitting Diodes ◽  
Single Layer ◽  
Charge Trapping ◽  
Electrical Impedance Spectroscopy ◽  
Time Dependent ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes

ABSTRACTElectrical impedance spectroscopy is used to show that time-dependent charge trapping processes occur in double-layer polymer light-emitting diodes based on poly(ethylene-dioxythiophene):poly(styrene sulfonic acid) (PEDOT:PSS) and poly(p-phenylene vinylene) (PPV). No time-dependent charge trapping processes are observed in single-layer devices based on PPV only. Furthermore, in double-layer devices based on poly(2,7-spirofluorene) (PSF) instead of PPV, such processes are also absent. Traps are probably created in the PPV layer close to the PEDOT:PSS interface due to chemical reactions that occur specifically between PEDOT:PSS and PPV.

Highly efficient single-layer blue polymer light-emitting diodes based on hole-transporting group substituted poly(fluorene-co-dibenzothiophene-S,S-dioxide)

2017 ◽  
Vol 5 (37) ◽  
pp. 9680-9686 ◽  
Author(s):  
Feng Peng ◽  
Na Li ◽  
Lei Ying ◽  
Wenkai Zhong ◽  
Ting Guo ◽  
...  
Keyword(s):  
Blue Light ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Single Layer ◽  
Random Copolymer ◽  
Hole Transport ◽  
Light Emitting ◽  
Hole Transporting ◽  
Polymer Light Emitting Diodes ◽  
Copolymer Poly

We developed a series of high-performance blue light-emitting polymers that contain hole-transport moieties comprising carbazole or triphenylamine substituents in the side chains of random copolymer poly(fluorene-co-dibenzothiophene-S,S-dioxide) (PFSO).

The effects of polymer molecular weight on the performance of single-layer polymer light emitting diodes

2013 ◽  
Vol T157 ◽  
pp. 014028 ◽  
Author(s):  
Mostafa Mergani ◽  
Afshin Shahalizad ◽  
Sohrab Ahmadi Kandjani ◽  
Mohammad Sadegh Zakerhamidi
Keyword(s):  
Molecular Weight ◽  
Light Emitting Diodes ◽  
Single Layer ◽  
Polymer Molecular Weight ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes

Thermal aging of single-layer polymer light-emitting diodes composed of a carbazole and oxadiazole containing copolymer doped with singlet or triplet emitters

2010 ◽  
Vol 160 (23-24) ◽  
pp. 2486-2493 ◽  
Author(s):  
Parul Rungta ◽  
Volodymyr Tsyalkovsky ◽  
Christopher F. Huebner ◽  
Yuriy P. Bandera ◽  
Stephen H. Foulger
Keyword(s):  
Thermal Aging ◽  
Light Emitting Diodes ◽  
Single Layer ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes

Solution processed polymer light-emitting diodes with single layer graphene anode

2012 ◽  
Author(s):  
Jaeheung Ha ◽  
Subeom Park ◽  
Donghyun Kim ◽  
Jaechul Ryu ◽  
Changhee Lee ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Solution Processed ◽  
Light Emitting ◽  
Layer Graphene ◽  
Polymer Light Emitting Diodes
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