Accession Number : ADP006445

Title :   Photovoltaic Effect and Optical Properties of Ferroelectric Thin Films Made By Sol-Gel Processing,

Corporate Author : CALIFORNIA UNIV LOS ANGELES DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s) : Xu, Yuhuan ; Chen, Ching J. ; Desimonr, N. ; Mackenzie, John D.

Report Date : MAR 1992

Pagination or Media Count : 13

Abstract : Ferroelectric thin films including undoped and doped PZT (lead zirconate titanate), BaTiO3 (barium titanate), SBN (strontium barium niobate), KNbO3 (Potassium niobate), PBN (lead barium niobate), KNSBN (potassium sodium strontium barium niobate), and LiNbO3 (lithium niobate) were made on silicon and fused silica substrates by a sol-gel process. A heterojunction effect was observed in ferroelectric thin films on both n-silicon and p-silicon through measurement of I- V characteristics, and by the demonstration of a photocurrent effect. Transparent and preferentially orientated SBN thin films on fused silica substrates can be obtained by applying a d.c. electric field during heat treatment. The films have structural and optical anisotropies as well as photorefractive properties. Two-wave mixing experiment was demonstrated by using these films and a maximum holographic efficiency of near 1 % was obtained.

Descriptors :   *HETEROJUNCTIONS, *THIN FILMS, *OPTICS, BARIUM, DEMONSTRATIONS, EFFICIENCY, ELECTRIC FIELDS, FILMS, FUSED SILICA, GELS, HEAT, HEAT TREATMENT, MEASUREMENT, MIXING, SILICON, SODIUM, STRONTIUM, SUBSTRATES, ZIRCONATES.

Subject Categories : Optics
      Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE