液晶
材料科学
铁电性
光电流
极化(电化学)
反常光电效应
光电效应
光电子学
光学
光伏系统
电介质
物理
化学
生态学
生物
物理化学
作者
Faheem Hassan,Donghao Yang,Lotfi Saadaoui,Yu Wang,Irena Drevenšek‐Olenik,Ziyang Qiu,Jingbin Shao,Yiming Zhang,Shaohua Gao,Yigang Li,Xinzheng Zhang,Jingjun Xu
出处
期刊:Optics Letters
[The Optical Society]
日期:2024-07-23
卷期号:49 (16): 4662-4662
摘要
The bulk photovoltaic (BPV) effect in ferroelectric liquid crystals is of increasing scientific interest owing to its great potential for light-energy conversion. The ferroelectric nematic phase exhibits a huge spontaneous polarization that can be aligned to a preferred direction. In this Letter, we investigate the tensorial properties of the BPV effect in the planarly aligned ferroelectric nematic phase of the liquid crystalline material RM734. A steady-state short-circuit photocurrent of ~160 pA and an open-circuit photovoltage of ~50 mV were observed in a cell with a thickness of 5.5 µm under the illumination of ultraviolet light without any bias voltage. Based on the photocurrent measurements in different electrode configurations, the non-zero elements of the BPV tensor were obtained. The BPV effect is attributed to the combination of the spontaneous polarization and the asymmetric distribution of photoinduced charge carriers. This study not only provides an understanding of the bulk PV mechanism in soft ferroelectrics but also promises a wide range of unprecedented, to the best of our knowledge, benefits for light harvesting to engineer marketable photovoltaic devices.
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