Enhanced Photovoltaic Response in Lead Lanthanum Zirconate-Titanate Ceramics with A-Site Deficient Composition for Photostrictor Application

Abstract

Samples of (Pb0.97, La0.03)(Zr0.52, Ti0.48)1-0.03/4O3 (PLZT) ceramics with and without an A-site deficient composition of 1 mol% in ABO3 perovskite structures have been prepared by sintering at 1200°C for 2 h to investigate the photovoltaic response upon UV illumination, as well as the ferroelectric and piezoelectric parameters such as the polarization-electric field (P–E) hysteresis curve, strain constant, and dielectric constant. Results confirmed that the A-site deficient composition generates a photovoltaic current twofold higher than that in the sample without the deficient composition. In the ferroelectric and piezoelectric parameters, no significant difference was measured between the two samples. These results indicate that the photostrictor response is mostly determined by the photovoltaic properties and that the overall response speed of photostriction can be markedly improved by enhanced photovoltaic current.

Synthesis, characterizations and photo-physical properties of novel lanthanum(III) complexes

“…Conceiving the importance of lanthanides in different fields, such as organic light emitting diodes (OLEDs), liquid crystals, fluoroimmunoassays, laser technology, optical telecommunication systems [1,2], there are much concern about the study of the lanthanide complexes. One of the early lanthanide elements, lanthanum, is itself used in the field of ceramics, thermal stability, solar energy, catalysis, photostrictor, dye sensitizers, scintillators, optoelectronic and photonic studies [3][4][5][6][7][8][9][10][11][12]. Due to wide applications in the field of luminescence [13][14][15], lanthanum is attracting the attention in the photo-physical research area.…”

Perovskites for photovoltaics: a combined review of organic–inorganic halide perovskites and ferroelectric oxide perovskites

“…However, in ferroelectric thin films, the film thickness is usually below a few hundreds of nanometers and therefore the effect of Edp can be significant. 126,128,178 Qin et al 128 established a comprehensive Edp model which simultaneously took into account the ferroelectric polarization, the space charge within the ferroelectric film and the screening charge from electrodes (Fig. 176 Therefore, ferroelectric polarization in thin films can only become stable when the polarization charges are screened by the charge carriers from ferroelectrics themselves or from electrodes.…”

PLZT-Based Light Controlled Piezoelectric Transformer

“…The tungstendoped PLZT ceramics, exhibit a large photovoltaic effect and photoinduced strain under near-ultraviolet illumination [8][9][10][11]. A-site deficiency can be a factor, that enhance the photovoltaic response [12].…”