Two-dimensional hybrid perovskite (2DHPs) semiconductors have shown great potential in multifunctional applications, especially dielectric switches and photoelectric detection owing to their diverse structural feasibility and excellent semiconducting features. However, most of the reported 2DHPs belong to the Ruddlesden–Popper (R–P) type, which unavoidably suffers from weak van der Waals interactions, degrading their reliability for long-term operation. The recently developed environmentally stable Dion–Jacobson (D–J) phase perovskites provide us with an opportunity to design 2DHPs with durable working performances. Here, we report a D–J phase perovskite material (BDA)MA₂Pb₃Br₁₀ (1, where BDA²⁺ is 1,4-butanediammomium and MA⁺ is methylammonium) that displays a remarkable switchable dielectric anomaly at 322 K. Meanwhile, the single crystal devices of 1 exhibit impressive photoelectric detection performances, featuring a large on/off current ratio (∼6.19 × 10³), remarkable responsivity (∼11.79 mA W⁻¹), and high detectivity (∼2.9 × 10¹¹ Jones). Additionally, due to the phase stability conferred by the D–J structure, these devices exhibit excellent photoresponsivity and resistance to fatigue, as evidenced by over 1200 photoresponse cycles, along with noteworthy stability in dielectric switching (maintained for two months). This study presents a comprehensive methodology for designing highly stable D–J phase perovskites with exceptional performance in dielectric switching and photoelectric detection, thereby expanding the repertoire of 2D D–J multifunctional hybrid perovskites.

中文翻译：

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Dion-Jacobson 混合钙钛矿半导体中的耐用介电开关和光响应性

二维混合钙钛矿（2DHP）半导体由于其多样化的结构可行性和优异的半导体特性，在多功能应用中显示出巨大的潜力，特别是介电开关和光电检测。然而，大多数报道的 2DHP 属于 Ruddlesden-Popper (R-P) 类型，不可避免地会受到弱范德华相互作用的影响，从而降低了其长期运行的可靠性。最近开发的环境稳定的迪翁-雅各布森（D-J）相钙钛矿为我们提供了设计具有持久工作性能的2DHP的机会。在这里，我们报道了一种D-J相钙钛矿材料（BDA）MA ₂ Pb ₃ Br ₁₀（1，其中BDA ²⁺是1,4-丁二铵，MA ⁺是甲基铵），它在322 K下表现出显着的可切换介电异常。同时， 1的单晶器件表现出令人印象深刻的光电探测性能，具有大的开/关电流比（∼6.19 × 10 ³）、显着的响应度（∼11.79 mA W ⁻¹）和高探测率（∼2.9 × 10 ¹¹琼斯）。此外，由于 D-J 结构赋予的相位稳定性，这些器件表现出优异的光响应性和抗疲劳性（超过 1200 个光响应周期证明了这一点），以及介电开关的显着稳定性（保持两个月）。这项研究提出了一种设计高度稳定的 D-J 相钙钛矿的综合方法，该钙钛矿在介电开关和光电检测方面具有出色的性能，从而扩展了 2D D-J 多功能混合钙钛矿的种类。