Light-emitting device and electronic apparatus including the same

A light-emitting device comprising:

• a first electrode;
• a second electrode;
• and
• an interlayer between the first electrode and the second electrode and comprising an emission layer, wherein
• the interlayer further comprises a hole transport region between the first electrode and the emission layer,
• the hole transport region comprises a first auxiliary layer and a second auxiliary layer between the first electrode and the first auxiliary layer,
• the first auxiliary layer comprises a first compound,
• the second auxiliary layer comprises a second compound,
• the first compound and the second compound are different from each other, and
• a lowest excitation triplet energy level (T1) of the first compound is equal to or greater than about 1.60 eV and less than or equal to about 1.80 eV.