Improvement of Current Efficiency at High Field Regime Via Description of Roll-off Characteristic in Model Device of OLEDs

Title
Improvement of Current Efficiency at High Field Regime Via Description of Roll-off Characteristic in Model Device of OLEDs
Authors
Hyeok KimJaehoon ParkGyeong-Tae ParkYoungmin NamSeongmin KimSungjin KimDong-Seok SongJae-Hyun KimJin-Hyuk KwonIn-Man KangSuyeon ParkChanghee Lee이도권Jin-Hyuk Bae
Keywords
Organic light emitting diodes; roll-off characteristics; current efficiency; device simulation
Issue Date
2014-12
Publisher
Molecular crystals and liquid crystals
Citation
VOL 599, NO 1, 79-85
Abstract
We demonstrated the effect of the field dependency of charge carrier mobility on roll-off characteristic of current efficiency. Field dependent factor in Poole-Frenkel model is controlled to describe charge balance of electron and hole concentration at high field. It is well established that roll-off characteristic is dependent upon mobility match which results in charge balance in EML. We exhibited the improvement of the roll-off characteristic of current efficiency and explained how charge balance is induced through this description.
URI
http://pubs.kist.re.kr/handle/201004/49182
ISSN
15421406
Appears in Collections:
KIST Publication > Article
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