苯并呋喃并吲哚衍生物及有机电致发光元件;BENZOFULOINDOLE DERIVATIVES AND ORGANIC ELECTROLUMINESCENCE DEVICES

摘要

依照本发明，提供下列通式(1)表示之苯并呋喃并吲哚衍生物、及有机电致发光元件，该有机电致发光元件具有一对电极及夹持于其间之至少一层有机层，其特征为该衍生物系作至少1层有机层之构成材料使用。本发明之苯并呋喃并吲哚衍生物作为有机EL元件之电洞注入层、电洞输送层、电子阻挡层或发光层之构成材料有用，有电子阻挡能力，且于薄膜状态安定、耐热性优异。故使用该苯并呋喃并吲哚衍生物形成之有机电致发光元件之发光效率及电力效率高，藉此元件之实用驱动电压低。又，能使发光起始电压低、改良耐久性。 　 【化1】; and Organic Electroluminescence Devices which have a pair of electrodes and at least one organic layer sandwiched therebetween, and the derivatives are used as the constituent material of at least one of the organic layer.　 The Benzofuloindole derivatives are useful as constituent material for a hole injection layer, a hole transporting layer, an electron blocking layer or a luminous layer of the Organic Electroluminescence Devices.　 The devices have an excellent electron blocking property, a high stability in their thin-film and an excellent heat resistance property.　 Therefore, the Organic Electroluminescence Devices of the present invention which are prepared by using the Benzofuloindole derivatives have a high luminescent efficiency and a high power efficiency, therefore, have a low practical driving voltage.