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68.1: Capacitance‐Voltage Characteristics of Top Emitting Organic Light Emitting Diodes for Mobile Display Application
Author(s) -
Lee Jaewon,
Lee KangJu,
Kim Minki,
Kim Jongsung,
Yoo Choongkeun,
Oh HyongYoon,
Yoon Sooyoung,
Kim ChangDong,
Hwang YongKee
Publication year - 2011
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.3620987
Subject(s) - oled , materials science , optoelectronics , capacitance , cathode , luminance , diode , voltage , electroluminescence , electron , electrode , electrical engineering , optics , chemistry , nanotechnology , layer (electronics) , physics , engineering , quantum mechanics
In this paper, Capacitance‐Voltage (CV) measurements as a powerful technique to analyze electric properties of Top emitting OLED (TOLED) devices are introduced. After comparing CV characteristics between inverted TOLED and conventional TOLED with thin metal, it is found that inverted OLED struggles charge injection, especially electron injection. Here Current‐Voltage‐Luminance (IVL) and CV characteristics are carefully analyzed for single carrier devices and dual carrier devices systematically. Top emitting OLED (TOLED) with thin metal cathode shows more efficient electron injection and higher efficiency than that of inverted OLED, which is attributed to the order of thermal deposition of organic/metal layers.