PChemLabTXT_page_639

PChemLabTXT | page 639 | https://thedailydialectics.com/pdfs/education/chemistry/p-chem/PChemLabTXT/PChemLabTXT.pdf

Confirming Pages ic 628 Chapter XIX_ Instruments FIGURE 21 Cross section of a p-n photodiode (a) and potential energy diagram or the junction region (b). Absorption of a photon with energy in excess of the band gap produces charge separation of the resultant electron-hole pair to produce a voltage…