Inside the PbS QDs/Bi2O2Se hybrid photodetector, when PbS quantum dots, acting as energy donors, are photoexcited to an psyched state, they're able to transfer their Strength non-radiatively to Bi2O2Se by dipole–dipole interactions. This will cause electrons from the valence band of Bi2O2Se to changeover to your conduction band. While in the PbS