We demonstrate a highly efficient white organic light emitting device with fluorescent small molecule 4,4′-bis(9-(1-naphthyl)anthracene-10-yl)biphenyl (BUBH-3). With a simple device architecture of indium tin oxide/tris 4,4′,4″-tris-N-naphthyl-N-phenylamino-triphenylamine (60nm)∕N,N′-bis-(1–naphthyl)-N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine (10nm)/BUBH-3 (45nm)∕Alq3 (15nm)∕LiF (1nm)∕Al (150nm), a white light with CIEx,y color of (0.31,0.36) was generated. The device achieved one of the best single-emitting-material electroluminescence performance of white organic light-emitting devices with efficiencies of 7.0cd∕A and 3.17lm∕W at 6.9V.

A highly efficient and stable sky blue organic light-emitting device doped with a sky blue dopant BUBD-1 has been fabricated, achieving an electroluminescence efficiency of 13.2cd∕A and 6.1lm∕W at 20mA∕cm2 and 6.7V, with Commission Internationale del’Eclairage coordinates of (0.16, 0.30) and a half-decay lifetime of 1815h at an initial brightness of 2640cd∕m2. This performance is one of the best blue devices ever reported without using hole blocking layer or any p or n dopant in hole or electron transport layer.

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A highly efficient two-element white light organic light-emitting device with a sky blue dopant BUBD-1 and a yellow dopant TBRb was fabricated. The device achieved an electroluminescence efficiency of 17.1cd∕A and 7.9lm∕W at 20mA∕cm2. From 112 to 32 010 nits, the CIEx,y coordinates variation was Δ(x,y)<±(0.01,0.01), which is superior to common white light organic light-emitting devices (OLEDs) that tend to change color with drive conditions. Moreover, the device reached a half-decay t1∕2 lifetime over 40000h at an initial luminance of 300cd∕m2. This result is among the best records of fluorescent white light OLEDs.

An organic light‐emitting device (OLED) with enhanced efficiency by employing an ambipolar material, 2‐methyl‐9,10‐di(2‐naphthyl)anthracene (MADN) as both hole‐transport and electron‐transport layers has been developed. The efficiency of the device is more than 40% enhanced compared with a control device. Moreover, the operational stability is also greatly improved as it minimizes the formation of all unstable redox species of Alq3+ as well as NPB−.