Organic light-emitting device

An organic 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 layers between two adjacent emission units of the m emission units, each of the m−1 charge generating layers comprising one n-type charge generating layer and one p-type charge generating layer,
• wherein m is an integer of 2 or more,
• the m emission units each comprise a hole transport region, an emission unit, and an electron transport region, arranged in order,
• a first hole transport region of the m hole transport regions comprises:
• a hole injection layer and/or a hole transport layer located between the first electrode and a first emission layer;
• and an auxiliary layer between the first electrode and one of the hole injection layer or the hole transport layer,
• the auxiliary layer comprises a fluoride of a metal having a work function of 3.8 eV or more, and
• the one of the hole injection layer or the hole transport layer comprises a p-dopant.