Three-dimensional organic–inorganic hybrid halide perovskites have been demonstrated as great materials for applications in optoelectronics and photonics. However, their inherent instabilities in the presence of moisture, light, and heat may hinder their commercialization. Alternatively, emerging two-dimensional (2D) organic–inorganic hybrid perovskites have recently attracted increasing attention owing to their great environmental stability and inherent natural quantum-well structure. In this work, we have synthesized a high-quality long-chain organic diammonium spacer assisted 2D hybrid perovskite FA-(N-MPDA)PbBr₄ (FA = formamidinium and N-MPDA = N-methylpropane-1,3-diammonium) by the slow evaporation at constant temperature method. The millimeter-sized single-crystalline microrods demonstrate low threshold random lasing behavior at room temperature. The single-crystalline 2D hybrid perovskite random laser achieved a very narrow linewidth (∼0.1 nm) with a low threshold (∼0.5 μJ cm⁻²) and a high quality factor (∼5350). Furthermore, the 2D hybrid microrod laser shows stable lasing emission with no measurable degradation after at least 2 h under continuous illumination, which substantially proves the stability of 2D perovskites. Our results demonstrate the promise of 2D organic–inorganic microrod-shaped perovskites and provide an important step toward the realization of high-performance optoelectronic devices.

中文翻译：

---

二维有机卤化铅单晶钙钛矿微棒中前所未有的随机激光。

三维有机-无机杂化卤化物钙钛矿已被证明是光电子和光子学中应用的绝佳材料。然而，它们在水分，光和热的存在下固有的不稳定性可能会阻碍其商业化。另外，新兴的二维（2D）有机-无机杂化钙钛矿由于其出色的环境稳定性和固有的天然量子阱结构而引起了越来越多的关注。在这项工作中，我们合成了高质量的长链有机二铵间隔物辅助2D杂化钙钛矿FA-（N -MPDA）PbBr ₄（FA =甲form ，N -MPDA = N-甲基丙烷-1,3-二铵）通过恒温恒速缓慢蒸发法。毫米大小的单晶微棒在室温下表现出低阈值随机激光行为。单晶2D混合钙钛矿随机激光器实现了非常窄的线宽（〜0.1 nm），低阈值（〜0.5μJcm ^-2）和高品质因数（〜5350）。此外，二维混合微棒激光器在连续照射至少2 h后显示稳定的激光发射，没有可测量的降解，这充分证明了二维钙钛矿的稳定性。我们的结果证明了二维有机-无机微棒形钙钛矿的前景，并为实现高性能光电器件迈出了重要一步。