Larger photovoltaic effect and hysteretic photocarrier dynamics in Pb[(Mg1/3Nb2/3)0.70Ti0.30]O3 crystal

TL;DR

This study reports a significant enhancement in the photovoltaic effect and complex photocarrier dynamics in a lead magnesium niobate-lead titanate crystal, indicating potential for advanced photovoltaic applications.

Contribution

The paper demonstrates a more than tenfold increase in photovoltaic efficiency and reveals hysteretic photocarrier behavior in Pb[(Mg1/3Nb2/3)0.7Ti0.30]O3, advancing understanding of its photoelectric properties.

Findings

Over tenfold increase in photovoltaic response.

Hysteretic charge carrier dynamics observed.

Photocurrent depends on light intensity and poling.

Abstract

Following the recent discovery of a bulk photovoltaic effect in the Pb[(Mg1/3Nb2/3)0.68Ti0.32]O3 crystal, we report here more than one order of magnitude improvement of photovoltaicity as well as its poling dependence in the related composition of lead magnesium niobate-lead titanate noted Pb[(Mg1/3Nb2/3)0.7Ti0.30]O3. Photocurrent measurements versus light intensity reveal a fascinating hysteretic charge carriers dynamics clearly demonstrating charge generation, trapping and release processes.