The Group 3A/Group 5A semiconductors are composed of equal amounts of atoms from Group 3A and Group 5Afor example, InP and GaAs. These types of semiconductors are used in lightemitting diodes and solid-state lasers. What would you add to make a p-type semiconductor from pure GaAs? How would you dope pure GaAs to make an n-type semiconductor?
Chemistry for Non-Science Majors Wednesday, January 27 Lecture Notes SHORT REVIEW FROM LAST CLASS: Ionic Bonds= metal + nonmetal (lose or gain electrons) Covalent Bond= 2 or more nonmetals (share electrons) Polyatomic Molecules= contains more than 2 atoms Atoms always want 8 valence electrons (electrons on their outer shell) ORGANIC CHEMISTRY Chemistry of carbon containing atoms We know more than 20 million chemical compounds, over 95% are compounds of Cm All organic molecules contain Hydrogen (H) and Carbon (C) o Some also contain O, N, P, S (Oxygen, Nitrogen, Phosphorus, Sulfur) Known as heteroatoms Compounds that contain only H and C = hydrocarbons o Simplest kind of organ
