S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Electrical and Computer Engineering (전기·정보공학부) Others_전기·정보공학부
Transient Electroluminescence in the Light-Emitting Diodes of Poly(p-phenylene) Thin Film
- Kang, G. W.; Lee, Changhee; Song, W. J.; Seoul, C.
- Issue Date
- 한국물리학회 = The Korean Physical Society
- J. Korean Phys. Soc. 36, 351
- We have studied the temporal response of the electroluminescence (EL) emission in the lightemitting
diodes fabricated with a vacuum-deposited poly (p-phenylene) (PPP) thin lm as an
emissive layer sandwiched between indium-tin-oxide (ITO) and Al electrodes. Upon application of
a rectangular driving voltage with a forward bias, we observed a time delay between the onset of the
bias voltage pulse and the EL emission. The EL time delay results from the charge carrier transport
towards the recombination zone. Since the hole mobility is much larger than the electron mobility
in PPP, the EL delay time is the transit time for holes in PPP thin films. The hole mobility is
estimated to be 1 105 cm2/Vs in vacuum-deposited PPP films.
- 0374-4884 (Print)