Opto-electronic device and electronic apparatus including the same

An opto-electronic device comprising:

• a first electrode;
• a second electrode facing the first electrode;
• and
• a photoactive layer arranged between the first electrode and the second electrode,
• wherein the photoactive layer comprises a first layer and a second layer, the first layer comprising a first compound, and the second layer comprising a second compound that does not comprise a 5-membered ring,
• the first compound is an electron-donating compound,
• the second compound is an electron-accepting compound, and
• the opto-electronic device satisfies Equation 1:
• 0.1≤(E1LUMO−E2LUMO)/(E1LUMO−E1HOMO)≤0.5 Equation 1
• wherein, in Equation 1,
• E1LUMO indicates a lowest unoccupied molecular orbital (LUMO) energy level of the first compound,
• E1HOMO indicates a highest occupied molecular orbital (HOMO) energy level of the first compound, and
• E2LUMO indicates a LUMO energy level of the second compound.