Oriented surface arrays on perovskite single-crystal thin films for enhanced polarization sensing

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2024-10-10 DOI:10.1016/j.optmat.2024.116251

Li Zhang , Junyu Li , Zeren He, Huanyang Chen, Yousheng Zou

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Abstract

Since polarized light can carry additional information to enhance target and environment identification, detection of polarized light has been widely used in complex environments and conditions. Generally, anisotropic arrayed gratings or structures are required to capture polarized signals, and these additional structures inevitably increase the size of the device and limit its application. Given this, using spontaneously grown anisotropic structures to enhance polarization identification has become an important direction to achieve miniaturized polarization detection. Organic-inorganic halide perovskites have been widely used in optoelectronic devices due to their excellent extinction coefficient and photogenerated carrier transport properties. Meanwhile, due to its simple solution preparation process, micro-region morphology modulation of perovskites can be realized using template-confined growth. In this work, ordered surface channels are constructed on MAPbBr₃ single-crystal thins film by template-confined growth. PDMS templates are utilized to transfer the CD- and DVD-ROM grating pattern and act as the templates to confine the single-crystal growth. By optimizing the imprinting parameters, channel arrays with spacing of 1450 nm and 760 nm are constructed on the surface of single crystals. Further, polarized photodetectors based on MAPbBr₃ single-crystal thin films are constructed with a high on/off ratio of 450 and a specific detectivity of 5 × 10⁹ Jones. The patterned detectors with intervals of 1450 nm and 760 nm exhibit enhanced polarization sensitivities of 1.72 and 1.83, respectively.

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用于增强偏振传感的过氧化物单晶薄膜定向表面阵列

由于偏振光可以携带额外的信息来增强目标和环境识别能力，因此偏振光探测已被广泛应用于复杂的环境和条件中。一般来说，捕捉偏振信号需要各向异性的阵列光栅或结构，而这些附加结构不可避免地会增加设备的体积，限制其应用。有鉴于此，利用自发生长的各向异性结构来增强偏振识别能力已成为实现微型化偏振探测的一个重要方向。有机-无机卤化物过氧化物晶石具有优异的消光系数和光生载流子传输特性，已被广泛应用于光电器件中。同时，由于其简单的溶液制备工艺，利用模板约束生长可以实现对包晶石微区形态的调控。在这项研究中，通过模板约束生长技术在 MAPbBr3 单晶薄片上构建了有序的表面通道。利用 PDMS 模板转移 CD 和 DVD-ROM 光栅图案，并将其作为限制单晶生长的模板。通过优化压印参数，在单晶表面构建了间距为 1450 nm 和 760 nm 的通道阵列。此外，还构建了基于 MAPbBr3 单晶薄膜的偏振光检测器，其导通/截止比高达 450，特定检测率为 5 × 109 琼斯。间隔为 1450 纳米和 760 纳米的图案化探测器的偏振灵敏度分别提高到 1.72 和 1.83。

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

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.