| Overview |
There are many needs for evaluation of the work function or the Fermi level especially for interface control related researches and for electronic materials and chemical reactions with electron emissions. Two methods are used for the work function evaluation – ultraviolet photoelectron spectroscopy (UPS) in a high vacuum and the Kelvin force microscopy (KFM) of the AFM in air. There may be differences in the results of UPS and KFM even though the work function of the same sample was evaluated. The measurement method differences were thought to be the main reason. |
