It is well known that ferroelectric (non-centrosymmetric) crystals are capable of revealing ″bulk photovoltaic effect″ i. e. production of greater-than-band-gap voltages under uniform illumination. While having piezoelectricity at the same time, the ferroelectrics are considered to cause the photostrictive effect as the superposition of these two phenomena. This paper describes the photovoltaic and photostrictive effects in the (Pb, La) (Zr, Ti)O//3 (PLZT) system. The composition PLZT (3/52/48) was found to reveal the largest product value of the photovoltaic voltage and piezoelectric coefficient. The photostriction and photovoltaic voltage are strongly dependent on the preparation method such as grain size and remanent polarization even with the same composition. Using PLZT ceramics, a photodriven relay has been fabricated and a primitive relay function controllable by the optical irradiation has been developed.
|Number of pages
|Yogyo Kyokai Shi/Journal of the Ceramic Society of Japan
|Published - Jan 1 1987
All Science Journal Classification (ASJC) codes
- General Engineering