Discovery of a 2D Hybrid Silver/Antimony-Based Iodide Double Perovskite Photoferroelectric with Photostrictive Effect and Efficient X-Ray Response,Advanced Functional Materials

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Discovery of a 2D Hybrid Silver/Antimony-Based Iodide Double Perovskite Photoferroelectric with Photostrictive Effect and Efficient X-Ray Response
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-08-03 , DOI: 10.1002/adfm.202205918
Chang‐Feng Wang _{1,

2} , Haojin Li ₃ , Qun Ji ₄ , Chuang Ma ₃ , Lang Liu ₂ , Heng‐Yun Ye ₂ , Bo Cao ₅ , Guoliang Yuan ₅ , Hai‐Feng Lu ₁ , Da‐Wei Fu ₁ , Ming‐Gang Ju ₄ , Jinlan Wang ₄ , Kui Zhao ₃ , Yi Zhang _{1,

2,

6}

Affiliation

2D hybrid halide double perovskites (HHDPs) have been demonstrated to be a promising alternative to conventional lead-based halide perovskites as a new system of photoferroelectrics, due to their unique characteristics of environmental friendliness, favorable stability, and fascinating optoelectronic properties. Herein, for the first time, a 2D iodide double perovskite photoferroelectric is reported based on Ag/Sb ions, (4,4-DFPD)₄AgSbI₈ (4,4-DFPD = 4,4-difluoropiperidinium), which possesses a high Curie temperature of 414 K (above BaTiO₃), a large spontaneous polarization of 9.6 μC cm⁻², ferroelectric photovoltaic effect, and photostrictive effect. Notably, to the best of the authors’ knowledge, the discovery of photostriction in HHDP photoferroelectrics is unprecedented. Moreover, (4,4-DFPD)₄AgSbI₈ exhibits an impressive X-ray responsivity, with a sensitivity as high as 704.8 μC Gy_air⁻¹ cm⁻² at 100 V bias and a detection limit as low as 0.36 μGy_air s⁻¹ at 10 V bias, both of which outperform the current all HHDP photoferroelectrics. This work enriches the photoferroelectric family, and proves that Ag/Sb-based HHDP photoferroelectrics are a promising candidate for the next-generation optoelectronic devices.

中文翻译：

发现具有光致伸缩效应和高效 X 射线响应的二维混合银/锑基碘化物双钙钛矿光电铁电体

二维杂化卤化物双钙钛矿（HHDPs）由于其独特的环境友好性、良好的稳定性和迷人的光电特性，已被证明是传统铅基卤化物钙钛矿的一种有前途的替代品，作为一种新的光铁电体系统。本文首次报道了基于 Ag/Sb 离子(4,4-DFPD) ₄ AgSbI ₈ (4,4-DFPD = 4,4-difluoropiperidinium) 的二维碘化物双钙钛矿光电铁电体，具有高居里温度为 414 K（高于 BaTiO ₃），自发极化为 9.6 μC cm ^-2、铁电光伏效应和光致伸缩效应。值得注意的是，据作者所知，HHDP 光铁电体中光致伸缩的发现是前所未有的。此外，(4,4-DFPD) ₄ AgSbI ₈表现出令人印象深刻的 X 射线响应度，在 100 V 偏压下灵敏度高达 704.8 μC Gy _air^-1 cm ^-2，检测限低至 0.36 μGy _air s ^-1在 10 V 偏压下，两者都优于当前所有 HHDP 光铁电体。这项工作丰富了光铁电家族，并证明基于 Ag/Sb 的 HHDP 光铁电体是下一代光电器件的有希望的候选者。

更新日期：2022-08-03

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