LIGHT EMITTING DEVICE, METHOD OF MANUFACTURING THE SAME, AND APPARATUS INCLUDING THE SAME

• Main Authors: LEE HAE-MYONG, LEE JONG-HYUK, CHO YUN-HYONG, KIM DONGAN, MOON JI-YOUNG, LEE HAKOONG, YOON HEEANG, MYUNG-SUK HAN, LEE JI-HYE, YOON JI-HWAN
• Format: Patent
• Language: Chinese; English
• Published: 09.07.2021
• Subjects: ELECTRICITY

The present application relates to a light emitting device comprising: a first electrode; a second electrode facing the first electrode; m emission units between the first electrode and the second electrode; and m-1 charge generating units between adjacent ones of the emission units, wherein m is 2 or a natural number greater than 2. The emission units each include an emission layer. At least one of the charge generation units includes an n-type charge generation layer and a p-type charge generation layer; and the n-type charge generation layer includes a first material and a second material. The first material comprises an organic electron transport compound; and the second material includes at least one selected from the group consisting of alkali metals, alkali metal alloys, alkaline earth metals, alkaline earth metal alloys, lanthanide metals, and lanthanide metal alloys. The light emitting device may have improved hole and electron balance, reduced driving voltage, and excellent efficiency and/or lifespa