| abstract |
By using a charge-transporting thin film made of a charge-transporting varnish containing a 1,4-benzodioxane sulfonic acid compound represented by the formula (1) as an electron-accepting substance, in particular in OLED devices and PLED devices, low driving voltage, high luminous efficiency, long life, etc. This excellent EL element characteristic can be realized.n n n (Formula 1)n n n n n n n n 1,4-benzodioxane sulfonic acid compound, electron accepting, charge transporting, varnish, thin film, OLED, PLED, light emission. |