Photovoltaic effect of crystalline-oriented lead lanthanum zirconate titanate in layered film structure

Photovoltaic (Pb,La)(Zr,Ti)₃ (PLZT) films in a layered structure of different cristallographie orientations are fabricated by optimized metalorganie deposition (MPD). Such films of (001) orientation exhibit a photovoltaic electrical power approximately 20 times higher than that of random films. The anisotropic optical properties of the oriented films, including dark conductivity, photoconductivity and photovoltaic tensors, are obtained quantitatively. These results show that the photovoltaic output current and power of the oriented films are highly improved to be comparable to those of semiconductors and suitable for application in the optical sensor of micro-electro-mechanical systems (MEMS).