It's Basically A Barrier Energy Between The Electron Gas Of The Metal And An External Vacuum.
Notice that inversion occurred when the surface potential is twice the fermi potential, which follows equation (5.1). And charging character of interface states The barrier decreases with the increasing work function as shown in fig.
The Motions Of Two Electrons At Each Energy Cancel Each Other (As For A And B).
The energy difference between fermi energy and vacuum level corresponds to the work function (φ). Rudy schlaf work function in metals: We performed the back contact work function optimization for bsp layer to make an ohmic contact.
The Work Function Corresponds To The Minimum
6(d) shows an absence of energy level bending at the back. Band diagram of a metal: 1 energy diagram of a semiconductor with flat bands to the surface.
Qφs (Inv ) =2Qφf (5.1) Figure 5.2:
Negatively biasing graphene relative to the substrate raises the fermi level, while low work function coatings like cs/o lower the vacuum level by forming strong surface dipoles. Energy band diagrams of (a) type i and (b) type ii quantum wells formed of materials with band gaps e g1 and e g2. 9 ev x si 4.05ev x sio 2 0.95 ev e c, e f e v e c e e f 3.1 ev qc g qc s x si (e c e f) e 0
(A) Schematic Sketch Of The Graphene Band Diagram.
The simulated band diagram is shown along with the work function in the inset of fig. For higher work function there is a rise in the energy level of the htl at the back contact. ‘free’ electrons energy band diagram of a metal.