Display apparatus, display module, and electronic device

A display apparatus comprising:

• a power supply line;
• a first transistor;
• a second transistor;
• a light-emitting device;
• and
• a light-receiving device,
• wherein the light-emitting device comprises a first electrode, a light-emitting layer, a first electron-transport layer, an electron-injection layer, and a second electrode that are stacked in this order,
• wherein the light-receiving device comprises a third electrode, an active layer, a first hole-transport layer, the electron-injection layer, and the second electrode that are stacked in this order,
• wherein the first electrode is electrically connected to one of a source and a drain of the first transistor,
• wherein the third electrode is electrically connected to one of a source and a drain of the second transistor,
• wherein the power supply line is electrically connected to the other of the source and the drain of the first transistor and the other of the source and the drain of the second transistor, and
• wherein a potential of the power supply line is higher than a potential of the second electrode.