کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10640195 | 995877 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Efficiency and stability of different tris(8-hydroxyquinoline) aluminium (Alq3) derivatives in OLED applications
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this work, we have investigated the material stability and organic light emitting diode (OLED) performance for tris-(8-hydroxyquinoline) aluminium (Alq3) and for three of the Alq3 derivatives. For each material, electron spin resonance (ESR) measurements were performed and the degradation of photoluminescence (PL) with atmosphere exposure was studied. Performance of OLEDs based on these materials was also studied. The device structure was ITO/N,Nâ²-di(naphthalene-1-yl)-N,Nâ²-diphenyl-benzidine (NPB) (50Â nm)/Alq3 or Alq3 derivatives (60Â nm)/LiF (0.3Â nm)/Al (60Â nm). It was found that the rate of PL decay of the films correlates strongly with the existence of ESR signal. However, stability of OLEDs fabricated from these materials showed no direct relationship with PL decay in the films. This indicates that the dominant degradation mechanism in OLEDs is related to the passage of electric current through the device. Detailed discussion of the performances of four light emitting materials in terms of efficiency and stability is given.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: B - Volume 116, Issue 1, 15 January 2005, Pages 75-81
Journal: Materials Science and Engineering: B - Volume 116, Issue 1, 15 January 2005, Pages 75-81
نویسندگان
C.Y. Kwong, A.B. DjuriÅ¡iÄ, W.C.H. Choy, D. Li, M.H. Xie, W.K. Chan, K.W. Cheah, P.T. Lai, P.C. Chui,