Document Details

Document Type : Article In Journal 
Document Title :
Exciton quenching at PEDOT:PSS anode in polymer blue-lightemitting diodes
Exciton quenching at PEDOT:PSS anode in polymer blue-lightemitting diodes
 
Subject : physics 
Document Language : English 
Abstract : The quenching of excitons at the poly(3,4-ethylenedioxythiophene): poly(styrenesulfonic acid) (PEDOT:PSS) anode in blue polyalkoxyspirobifluorene-arylamine polymer light-emitting diodes is investigated. Due to the combination of a higher electron mobility and the presence of electron traps, the recombination zone shifts from the cathode to the anode with increasing voltage. The exciton quenching at the anode at higher voltages leads to an efficiency roll-off. The voltage dependence of the luminous efficiency is reproduced by a drift-diffusion model under the condition that quenching of excitons at the PEDOT: PSS anode and metallic cathode is of equal strength. Experimentally, the efficiency roll-off at high voltages due to anode quenching is eliminated by the use of an electronblocking layer between the anode and the light-emitting polymer 
ISSN : 1089-7550 
Journal Name : JOURNAL OF APPLIED PHYSICS 
Volume : 116 
Issue Number : 22 
Publishing Year : 1435 AH
2014 AD 
Article Type : Article 
Added Date : Thursday, July 27, 2017 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
D AbbaszadehAbbaszadeh, D InvestigatorDoctorate 
G. A. H Wetzelaer,Wetzelaer,, G. A. H ResearcherDoctorate 
H. T NicolaiNicolai, H. T ResearcherDoctorate 
P. W. M. BlomBlom, P. W. M. ResearcherDoctorateblom@mpip-mainz.mpg.de

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