ORGANIC LIGHT-EMITTING DEVICE AND LIGHT-EMITTING APPARATUS COMPRISING THE DEVICE

摘要

ÄProblemÜ Platinum and iridium are both so-called precious metals and therefore a platinum complex and iridium complex using those are also expensive. This will hinder reduction of cost in future. An object of the present invention is to provide a triplet light emission material at lower cost than prior art. Another object is to provide an inexpensive organic light emitting element which is bright but consumes little power using the triplet light emission material, and to provide a light emitting device using the organic light emitting element. ÄSolving MeansÜ A chelate complex having as its central metal tungsten which is an inexpensive metal and which is a heavy atom is applied to an organic light emitting element, thereby obtaining an organic light emitting element capable of converting the triplet excitation energy into light emission. By applying the organic light emitting element using this metal complex, an inexpensive light emitting device which is bright but consumes little power can be provided as well as an electric appliance using the light emitting device. ÄSelected DrawingÜ   Chemical Formula 1