CHEM 1101 Lecture 12: (Band Diagrams - Intrinsic Semiconductors)
Document Summary
Band diagrams only happen for network atoms. All atoms join the same molecule (same element) Only metal atoms can do this (ie. li 10 ) Two non-metals (si & c) are the exceptions to this rule; they can form band diagrams too. Similar to mo diagrams, however the middle is a bar between the sigma and sigma star orbitals. Shade in the bottom half of the bar with lines (not horizontal lines; they look like orbitals) Highest energy band with any electrons in it. Lowest band with any holes (empty spaces for electrons) in it. Holds the space (orbitals) that the electrons will move into. Lowest individual orbital in the band with t least one hole (empty space) in it. ** mg does not form a band diagram. Highest individual orbital in the band with at least one electron. Example (mg n ) where n is a large number. Example (li n ) where n is a large number.