Phase-pure ferroelectric quantum wells with tunable photoluminescence for multi-state optoelectronic applications

IF 20.6 Q1 OPTICS
Rui Sun, Yuping Jia, Bo Lai, Zhiming Shi, Mingrui Liu, Weili Yu, Ke Jiang, Shanli Zhang, Shunpeng Lv, Yang Chen, Xiaojuan Sun, Dabing Li
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引用次数: 0

Abstract

Quasi-two-dimensional (quasi-2D) metal halide perovskite (MHP) ferroelectrics, characterized by spontaneous polarization and semiconducting properties, hold promise for functional photoferroelectrics in applications such as optical storage and in-memory computing. However, typical quasi-2D perovskite films contain multiple quantum wells with random width distribution, which degrade optoelectronic properties and spontaneous polarization. Here, we introduce phase-pure quantum wells with uniform well width by incorporating the inorganic salt MnBr2, which effectively controls crystallization kinetics and restricts the nucleation of high n-phases, producing high-quality films. The resulting (BA)2CsPb2Br7 (BA = C4H9NH3) film demonstrates ferroelectric hysteresis behavior, clear in-plane ferroelectric domain switching, and a high photoluminescence quantum efficiency (PLQE) of 88.7%. Significantly, we observed a nonvolatile, reversible in situ photoluminescence (PL) modulation of Mn2+ in this ferroelectric MHP film under an applied electric field, attributed to lattice distortion from ferroelectric polarization orientation. These findings enabled the development of a simple system comprising gallium nitride (GaN) light emitting diodes (LEDs) and ferroelectric films to implement multi-state signal encoding and a logic AND gate. This work advances the fabrication of efficient ferroelectric MHP films and highlights their potential for advanced optoelectronic applications.

Abstract Image

多态光电应用中具有可调谐光致发光的纯相铁电量子阱
准二维(准2d)金属卤化物钙钛矿(MHP)铁电体具有自发极化和半导体特性,在光学存储和内存计算等应用中具有功能性光铁电体的前景。然而,典型的准二维钙钛矿薄膜含有多个随机宽度分布的量子阱,这降低了光电性能和自发极化。本文通过引入无机盐MnBr2引入均匀阱宽的纯相量子阱,有效控制结晶动力学,限制高n相的成核,制备出高质量的薄膜。所制得的(BA)2CsPb2Br7 (BA = C4H9NH3)薄膜具有铁电迟滞行为、清晰的面内铁电畴切换和高达88.7%的光致发光量子效率(PLQE)。值得注意的是,我们观察到在外加电场作用下,铁电MHP薄膜中Mn2+的非挥发性,可逆的原位光致发光(PL)调制,归因于铁电极化取向的晶格畸变。这些发现使得开发一个简单的系统,包括氮化镓(GaN)发光二极管(led)和铁电薄膜,以实现多态信号编码和逻辑与门。这项工作推进了高效铁电MHP薄膜的制造,并突出了它们在先进光电应用方面的潜力。
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
Light-Science & Applications
Light-Science & Applications 数理科学, 物理学I, 光学, 凝聚态物性 II :电子结构、电学、磁学和光学性质, 无机非金属材料, 无机非金属类光电信息与功能材料, 工程与材料, 信息科学, 光学和光电子学, 光学和光电子材料, 非线性光学与量子光学
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803
审稿时长
2.1 months
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