An organic electroluminescent device of the present invention includes a substrate (11), an anode (12), an organic layer (13) having a light emitting layer (17), and a cathode (14) capable of transmitting light. The cathode has an electron injection layer (18) of calcium and a protective layer (19) of silver. The protective layer covers the surface of the electron injection layer.
                            本发明的一种有机电致发光装置包括基板(11)、阳极(12)、具有发光层(17)的有机层(13)和能够透光的阴极(14)。阴极有一个
钙电子注入层(18)和一个
银保护层(19)。保护层覆盖在电子注入层的表面。