Document Details

Document Type : Article In Journal 
Document Title :
Effect of arylamine hole-transport units on the performance of blue polyspirobifulorene light-emitting diodes
Effect of arylamine hole-transport units on the performance of blue polyspirobifulorene light-emitting diodes
 
Subject : physics 
Document Language : English 
Abstract : The operation of blue light-emitting diodes based on polyspirobifluorene with a varying number of N,N,N', N' tetraaryldiamino biphenyl (TAD) hole-transport units (HTUs) is investigated. Assuming that the electron transport is not affected by the incorporation of TAD units, model calculations predict that a concentration of 5% HTU leads to an optimal efficiency for this blue-emitting polymer. However, experimentally an optimum performance is achieved for 10% TAD HTUs. Analysis of the transport and recombination shows that polymer light-emitting diodes with 5%, 7.5%, and 12.5% TAD units follow the predicted behavior. The enhanced performance of the polymer with 10% TAD originates from a decrease in the number of electron traps, which is typically a factor of three lower than the universal value found in many polymers. This reduced number of traps leads to a reduction of nonradiative recombination and exciton quenching at the cathode 
ISSN : 1098-0121 
Journal Name : PHYSICAL REVIEW B 
Volume : 90 
Issue Number : 20 
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
Davood AbbaszadehAbbaszadeh, Davood InvestigatorDoctorate 
Herman T NicolaiNicolai, Herman T ResearcherDoctorate 
N. Irina CraciunCraciun, N. Irina ResearcherDoctorate 
P. W. M. BlomBlom, P. W. M. ResearcherDoctorate 

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