Polymer, composition for organic electroluminescent element, organic electroluminescent element, organic EL display device, organic EL lighting, and manufacturing method for organic electroluminescent element
摘要
說(shuō)明書
The hole-blocking layer may have any thickness as long as the effects of the present invention are not markedly impaired; however, the thickness of the hole-blocking layer is usually 0.3 nm or greater, preferably 0.5 nm or greater, but usually 100 nm or less, preferably 50 nm or less.
[Electron Transport Layer]
The electron transport layer 6 is arranged between the light-emitting layer 5 and the electron injection layer for the purpose of further improving the current efficiency of the element.
The electron transport layer 6 is composed of a compound that is capable of efficiently transporting electrons injected from the cathode 7 toward the light-emitting layer 5 between electrodes to which an electric field applied. An electron-transporting compound used in the electron transport layer 6 is required to be a compound that allows highly efficient electron injection from the cathode 7 or the electron injection layer, has a high electron mobility, and is capable of efficiently transporting injected electrons.
