ELECTRICAL AND OPTICAL-PROPERTIES OF THERMALLY EVAPORATED LIBO2-LIF COMPOSITE FILMS

Optical and electrical properties of the LiBO2-LiF composite thin film s prepared by thermal evaporation have been studied for their use as i on conductors in solid-state electrochromic (EC) systems. All the LiBO 2-LiF films exhibited a high degree of optical transmission (over 90%) and the best lithium ion conductivity attainable was about 8x10(-7) S cm(-1), a value considerably higher than that for the ionic conductiv ity of LiBO2. A typical activation energy of 0.545 eV was found for th e composite film. The films obtained thus have a good potential for us e as ion conductors in EC devices. (C) 1995 American Institute of Phys ics.