Charge carrier accumulation in lithium fluoride thin films due to Li-ion absorption by titania (100) subsurface.
The thermodynamically required redistribution of ions at given interfaces is being paid increased attention. The present investigation of the contact LiF/TiO(2) offers a highly worthwhile example, as the redistribution processes can be predicted and verified. It consists in Li ion transfer from LiF into the space charge zones of TiO(2). We not only can measure the resulting increase of lithium vacancy conductivity in LiF, we also observe a transition from n- to p-type conductivity in TiO(2) in consistency with the generalized space charge model.
Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany. C.Li@fkf.mpg.de
Chilin
C
Li
Lin
L
Gu
Xiangxin
X
Guo
Dominik
D
Samuelis
Kun
K
Tang
Joachim
J
Maier
D000042:Absorption; D003198:Computer Simulation; D005459:Fluorides / Q000737:chemistry*; D007477:Ions; D008094:Lithium / Q000737:chemistry*; D018020:Lithium Compounds / Q000737:chemistry*; D008567:Membranes, Artificial; D008956:Models, Chemical; D008958:Models, Molecular; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D012666:Semiconductors; D055672:Static Electricity; D014025:Titanium / Q000737:chemistry*
D007477:Ions; D018020:Lithium Compounds; D008567:Membranes, Artificial; C027651:lithium fluoride; C009495:titanium dioxide; D008094:Lithium; D014025:Titanium; D005459:Fluorides