Stable styrylamine-doped blue organic electroluminescent device based on 2-methyl-9,10-di(2-naphthyl)anthracene

Abstract

We have developed a highly efficient and stable blue organic electroluminescent (EL) device based on a blue fluorescent styrylamine dopant, p-bis(p-N,N-diphenyl-aminostyryl)benzene, in a morphologically stable high band-gap host material, 2-methyl-9,10-di(2-naphthyl)anthracene, which achieved an EL efficiency of 9.7cd∕A and 5.5lm∕W at 20mA∕cm2 and 5.7 V, with Commission Internationale d’Eclairage coordinates of (x=0.16,y=0.32). The blue-doped device achieved a half-decay lifetime (t1∕2) of 46 000 h at an initial brightness of 100cd∕m2.

Recent Development of Blue Fluorescent OLED Materials and Devices

“…The better transport property of host MADN molecules than that of DPVPA is evident as reflected in its much lowered drive voltage by nearly 1 V. From the energy diagram shown in Fig. 9, the DSA-Ph dopant can effectively provide an energetically favorable pathway for both e and h transported into the emitter for recombination [24]. DSA-Ph doped in MADN also greatly suppressed the current-induced quenching, as shown in Fig.…”

Controllable molecular configuration for significant improvement of blue OLEDs based on novel twisted anthracene derivatives

“…Then, Lee et al designed 2-methyl-9,10-di(2-naphthyl)anthracene based on the structure of DPA, and the electroluminescent devices with styrylamine as dopant were fabricated, and the efficiencies of 9.7 cd A À1 and 5.5 lm W À1 at 20 mA cm À2 were achieved. It means the crystallization in the film can be efficaciously suppressed [14]. Prior to the symmetrical structure, the unsymmetrical structure can be a promising candidate for the formation of efficient, stable and amorphous film.…”

Bright electroluminescent devices with tunable spectra obtained by strictly controlling the doping concentration of electron injection sensitizer

“…In the past years, green, red, yellow, and orange EL devices have been improved significantly; consequently, their efficiencies and brightness basically satisfy the requirement of application. However, blue and blue-green EL devices have remained the most challenging of the primary emissive colours in terms of efficiency and brightness [9][10][11][12].…”