Details

Autor(en) / Beteiligte

• Jou, Jwo-Huei
• Chiang, Po-Hsuan
• Lin, Yu-Pu
• Chang, Chin-Yeh
• Lai, Chun-Liang

Titel

Hole-transporting-layer-free high-efficiency fluorescent blue organic light-emitting diodes

Ist Teil von

• Applied physics letters, 2007-07, Vol.91 (4)

Erscheinungsjahr

2007

Quelle

美国小型学会期刊集（AIP Scitation平台）

Beschreibungen/Notizen

• High-efficiency fluorescent blue organic light-emitting diodes were fabricated using hole-injection and carrier-confining effective device architecture without a hole-transporting layer. The diodes consist of 1250Å indium tin oxide/300Å blue-emissive layer/400Å electron-transporting layer/10Å lithium fluoride/1500Å aluminum. A high efficiency of 6.0% (12.5lm∕W) at 100cd∕m2 with a pan-blue emission of (0.19, 0.31) when trans-1,2-bis-(6-(N,N-di-p-tolylamino)naphthalene-2-yl)ethene was used in the emissive layer, or 3.9% (6.7lm∕W) with a blue emission of (0.15, 0.20) when 2-(N,N-diphenylamino)-6-[4-(N,N-diphenylamino)-styryl]naphthalene was used. Besides having a thinner device structure, the marked improvement in efficiency is attributable mainly to the relatively low hole-injection barrier.