AI 中文总结
本文合成了新型无铅螺旋结构二维卤化物钙钛矿，其相变温度达412 K，可实现60 nA热释光电子电流，通过PFM证实极化畴可由光调控，为相关器件应用提供新途径。
AI 中文摘要
将热释光电子效应与铁电特性结合于单一材料中，不仅会产生奇特的物理现象，还为构建下一代多功能能量收集器件提供了策略。层状卤化物钙钛矿是一类新兴的协同二维材料，具有优异的光诱导功能。本文中，我们报道了一种含部分氟化芳环的无铅钙钛矿(3-氟苄胺)₂CuCl₄的合成。分子链呈螺旋手性，赋予材料柔性、能量转移能力，并能在光照射下灵活调控热释光电子特性。氟化框架将铁电-顺电转变温度（Tc）提升至约412 K，处于宽范围实用区间。在紫外-可见光照射下，可明显观察到巨大的热释光电子响应；在λex≈365 nm（27 mW）的光照下，自供电配置下实现了高达60 nA的热释光电子电流。通过压电响应力显微镜（PFM）响应可直观观测到自发极化与光学特性的复杂耦合，尤其在光照射的开关步骤中，极化畴会可逆减小。这表明光为光电器件、光存储器、光/热致变色系统及能量收集器等应用的特性调控提供了另一自由度。
英文摘要
Bridging pyro-phototronic and ferroelectric properties in a single material not only gives rise to exotic physical phenomena but also provides strategy to build-up next-generation multi-functional energy harvesting devices. The layered halide perovskites are emerging class of synergetic 2D-materials of exceptional light-induced functionalities. Here, we report synthesis of a lead-free perovskite (3-fluorobenzylamine)2CuCl4 of partially fluorinated aromatic rings. Molecular chains are chiral in helicoids so to render flexibility, energy-transfer, and freedom to tailor tunable pyro-phototronics on light illumination. The fluorinated framework promotes ferroelectric-to-paraelectric transition point (TC), as high as \textasciitilde 412 K of wide range of workably. A giant pyro-photronic response is distinctly evident even upon UV-visible light-illuminations. A significantly high pyro-photronic current of 60 nA was achieved under an illumination of λex\textasciitilde 365 nm (27 mW) in a self-powered configuration. Consequently, an intricate coupling of the spontaneous polarization to the optical properties is visualized from the piezo response force microscopy (PFM) responses. In particular, the polar domains get diminished reversibly in on-off steps of the light irradiations. It indicates, the light provides another degree of the freedom to control the features for the applications of optoelectronic devices, optical memories, photo/thermo-chromic systems, and energy-harvesters.
