OPTICAL AND ELECTROLUMINESCENCE PROPERTIES OF POLY(METHYLPHENYLSILANE) CONTAINING AN ANTHRACENE UNIT

A poly(methylphenylsilane) containing anthracene units in the polymer backbone was synthesized by the Wrutz-type reaction of 9,10-bis(methyl propylchlorosilyl) anthracene and methylphenyldichlorosilane. This pol ymer exhibited light-blue photoluminescence (emission maximum 480 nm) with an 87% quantum efficiency. A typical single-layer-type electrolum inescence (EL) device with a glass substrate/indium-tin-oxide/polymer layer/aluminum structure was fabricated using this polymer. This devic e showed electroluminescence with a similar spectrum to the photolumin escence when the forward bias was applied. At present, the external qu antum efficiency calculated in terms of emitted photons per transporte d electronic charge was 0.01%. We also developed a patterning-image-di splay EL device utilizing photodecomposition of the polymer chain. Thi s device emitted the patterning image without using the complicated el ectrode patterning.