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http://dx.doi.org/10.5012/bkcs.2011.32.8.2899

Highly Efficient Multi-Functional Material for Organic Light-Emitting Diodes; Hole Transporting Material, Blue and White Light Emitter  

Kim, Myoung-Ki (Department of Chemistry, College of Natural Sciences, Seoul National University)
Kwon, Jong-Chul (Department of Chemistry, College of Natural Sciences, Seoul National University)
Hong, Jung-Pyo (Department of Chemistry, College of Natural Sciences, Seoul National University)
Lee, Seong-Hoon (Department of Chemistry, College of Natural Sciences, Seoul National University)
Hong, Jong-In (Department of Chemistry, College of Natural Sciences, Seoul National University)
Publication Information
Bulletin of the Korean Chemical Society / v.32, no.spc8, 2011 , pp. 2899-2905 More about this Journal
Abstract
We have demonstrated that TPyPA can be used as an efficient multi-functional material for OLEDs; hole transporting material (HTL), blue and white-light emitter. The device based on TPyPA as the HTL exhibited an external quantum efficiency of 1.7% and a luminance efficiency of 4.2 cd/A; these values are 40% higher than the external quantum efficiency and luminance efficiency of the NPD-based reference device. The device based on TPyPA as a blue-light emitter exhibited an external quantum efficiency of 4.2% and a luminance efficiency of 5.3 $cdA^{-1}$ with CIE coordinates at (0.16, 0.14), the device based on TPyPA as a white-light emitter exhibited an external quantum efficiency of 3.2% and a luminance efficiency of 7.7 $cdA^{-1}$ with CIE coordinates at (0.33, 0.39). Also, TPyPA-based organic solar cell (OSC) exhibited a maximum power conversion efficiency of 0.35%. TPyPA-based organic thin-film transistors (OTFTs) exhibited highly efficient field-effect mobility (${\mu}_{FET}$) of $1.7{\times}10^{-4}cm^2V^{-1}s^{-1}$, a threshold voltage ($V_{th}$) of -15.9 V, and an on/off current ratio of $8.6{\times}10^3$.
Keywords
OLEDs; Hole transport material; Blue emitter; White OLEDs; Multi-functional material;
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