Improve the Efficiency of White Organic Light-Emitting Devices Using Double-Doped System

Abstract:

The doped and non-doped white Organic light-emitting devices (OLEDs) were fabricated, using strong yellow emitting and hole-transporting ability of TPAHQZn. When the white OLED is a double-doped structure, greatly enhanced the efficiency of the device. The double-doped white device were fabricated as follows: ITO/2T-NATA (17 nm)/ CBP: 30% TPAHQZn: 8% Ir(ppy)3 (25 nm)/ NPBX (15 nm)/BCP(8nm)/TPBi: 10% Ir(ppy)3 (15nm)/Alq3 (20 nm)/LiF (1.3 nm)/Al. The double-doped white OLEDs were obtained with Commission International de L’Eclairage coordinates of (0.29,0.28) at 17 V, the maximum current efficiency increaed four times that double-doped white device of 4.12cd/A(8V) than non-doped of 1.03 cd/A (10V) .

• Periodical: Advanced Materials Research (Volumes 152-153)
• Pages: 687-690
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.152-153.687
• Online since: October 2010
• Authors: Gui Ying Ding, Wen Long Jiang, Guang De Wang, Qiang Han, Xi Chang
• Keywords: Doped, Efficiency, Organic Light-Emitting Devices (OLEDs)

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