Organic light-emitting device

An organic light-emitting device comprising:

• a first electrode;
• a second electrode facing the first electrode;
• a first emission unit and a second emission unit, the first and second emission units being between the first electrode and the second electrode;
• and
• a first charge generation layer between the first emission unit and the second emission unit;
• wherein the first emission unit comprises a first emission layer and a first inorganic buffer layer,
• wherein the second emission unit comprises a second emission layer and a second inorganic buffer layer,
• wherein:
• i) the first inorganic buffer layer comprises a halide compound of a first metal and a second metal;
• or
• ii) the second inorganic buffer layer comprises a halide compound of a first metal and a second metal, and
• wherein the second metal comprises at least one metal selected among from Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, Yb, Sm, Cu, Tl, Cd, Hg, Sn, Pb, Bi, Zn, Mn, Fe, Co, Ni, In, Ga, Th, and U.