Abstract

A new emitting material, tetra(β-naphthyl)silane (TNS), was synthesized and used as hole blocking material in organic light-emitting devices (OLEDs). Devices with a configuration of ITO/α-NPB/TNS/Alq3/Al have been constructed, where ITO is indium–tin-oxide, α-NPB is (4,4′-bis[N-(1-naphthyl)-N-phenylamino] biphenyl), and Alq3 is (8-quinolinolato) aluminum. A high performance blue light OLED was obtained, which emits blue light with a peak at 439 nm and starts to emit light at 6 V and the luminance can reach to 3800 cd/m2 at 13 V and 250 mA/cm2.

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