In the PbS QDs/Bi2O2Se hybrid photodetector, when PbS quantum dots, performing as Strength donors, are photoexcited to an fired up condition, they will transfer their energy non-radiatively to Bi2O2Se by way of dipole–dipole interactions. This triggers electrons within the valence band of Bi2O2Se to transition for the conduction band. From https://wildbookmarks.com/story17701706/5-easy-facts-about-waiijing-described