Organic compound, light-emitting element, light-emitting device, electronic device, and lighting device
摘要
說明書
The charge-generation layer 115 may have a stacked structure of a layer containing the composite material of an organic compound and an acceptor substance and a layer containing another material. For example, the charge-generation layer 115 may be formed using a combination of a layer containing the composite material of an organic compound and an acceptor substance with a layer containing one compound selected from among electron-donating materials and a compound having a high electron-transport property. Furthermore, the charge-generation layer 115 may be formed using a combination of a layer containing the composite material of an organic compound and an acceptor substance with a layer containing a transparent conductive film.
The charge-generation layer 115 provided between the light-emitting unit 106 and the light-emitting unit 110 is configured so that electrons are injected into one of the light-emitting units and holes are injected into the other light-emitting unit when a voltage is applied between the electrode 101 and the electrode 102. For example, in
Note that in terms of light extraction efficiency, the charge-generation layer 115 preferably has a visible light transmittance (specifically, a visible light transmittance of higher than or equal to 40%). The charge-generation layer 115 functions even when having lower conductivity than the pair of electrodes (the electrodes 101 and 102).
