X-ray-ultraviolet–visible-near-infrared photoresponses realized in a lead-free hybrid perovskite ferroelectric through light-induced ferro-pyro-phototronic effect

IF 22.7 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Infomat Pub Date : 2024-07-01 DOI:10.1002/inf2.12602
Dongying Fu, Yanli Ma, Shufang Wu, Lin Pan, Qi Wang, Ruifang Zhao, Xian-Ming Zhang, Junhua Luo
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引用次数: 0

Abstract

Due to the built-in electric field induced by spontaneous polarization in hybrid perovskite (HP) ferroelectrics, the devices based on them exhibit excellent performance in self-powered photodetection. However, most of the self-powered photodetector are made of lead-based HP ferroelectrics and have a relatively narrow photoresponse waveband. Although lead-free HPs solve the problem of lead toxicity, their optoelectronic performance is inferior to that of lead-based HPs and photoresponse waveband is limited by its optical band gap, which hinders their further application. To solve this problem, herein, a lead-free HP ferroelectric (HDA)BiI5 (HDA is hexane-1,6-diammonium) with large spontaneous polarization shows an enhanced photocurrent and achieves x-ray-ultraviolet–visible-near-infrared (x-ray-UV–Vis–NIR) photoresponse through the ferro-pyro-phototronic (FPP) effect. The ferroelectric, pyroelectric, and photovoltaic characteristics coupled together in a single-phase (HDA)BiI5 ferroelectric is an effective way to improve the performance of the devices. What is particularly attractive is that the FPP effect not only improves the optoelectronic performance of (HDA)BiI5, but also achieves broadband photoresponses beyond its optical absorption range. Especially, the current boosting with an exceptional contrast of ~1100% and 2400% under 520 and 637 nm, respectively, which is associated with FPP effect. Meanwhile, single crystal self-powered photodetector based on (HDA)BiI5 also exhibit significant FPP effects even under high-energy x-ray, which owns an outstanding sensitivity of 170.7 μC Gy−1 cm−2 and a lower detection limit of 266 nGy s−1 at 0 V bias. Therefore, it is of great significance to study the coupling of multiple physical effects and improve device performance based on lead-free HP ferroelectrics.

Abstract Image

Abstract Image

通过光诱导铁-吡罗-光电效应在无铅混合包晶铁电体中实现 X 射线-紫外-可见-近红外光响应
由于混合包晶石(HP)铁电体中自发极化诱导的内置电场,基于它们的器件在自供电光电探测方面表现出卓越的性能。然而,大多数自供电光电探测器都是由铅基 HP 铁电材料制成的,光响应波段相对较窄。虽然无铅 HP 解决了铅毒性问题,但其光电性能不如铅基 HP,光响应波段受限于其光带隙,这阻碍了其进一步应用。为了解决这一问题,本文提出了一种具有大自发极化的无铅 HP 铁电 (HDA)BiI5(HDA 为己烷-1,6-二铵),这种 HP 具有增强的光电流,并通过铁-热释光(FPP)效应实现了 x 射线-紫外-可见-近红外(x-ray-UV-Vis-NIR)光响应。在单相(HDA)BiI5 铁电中耦合铁电、热释电和光电特性是提高器件性能的有效方法。特别吸引人的是,FPP 效应不仅提高了 (HDA)BiI5 的光电性能,还实现了超出其光学吸收范围的宽带光响应。特别是在 520 纳米和 637 纳米波长下,电流提升的对比度分别达到了约 1100% 和 2400%,这与 FPP 效应有关。同时,基于(HDA)BiI5 的单晶自供电光电探测器即使在高能 X 射线下也表现出显著的 FPP 效应,其灵敏度高达 170.7 μC Gy-1 cm-2,在 0 V 偏置下的检测下限为 266 nGy s-1。因此,研究多种物理效应的耦合,提高基于无铅 HP 铁电的器件性能具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Infomat
Infomat MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
37.70
自引率
3.10%
发文量
111
审稿时长
8 weeks
期刊介绍: InfoMat, an interdisciplinary and open-access journal, caters to the growing scientific interest in novel materials with unique electrical, optical, and magnetic properties, focusing on their applications in the rapid advancement of information technology. The journal serves as a high-quality platform for researchers across diverse scientific areas to share their findings, critical opinions, and foster collaboration between the materials science and information technology communities.
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