Integrating together the nanostructures of two dissimilar materials into a single architecture can usually gain superior physical properties owing to the strong interaction. Herein, we proposed an epitaxial growth strategy to synthesize lead-based triiodide perovskite/telluride colloidal nanoscale heterostructures (CsPbI₃/PbTe CNHs) via a rapid hot-injection method. The as-obtained CNHs exhibited a longer fluorescence lifetime associated with the radiative recombination of charge carriers, compared with the pristine CsPbI₃ colloidal nanocrystals (CNCs). This was mainly attributed to the passivation of surface defects achieved by the PbTe component, which could be evidenced by the time-resolved spectroscopic studies. The stability of the CNHs had been improved considerably in comparison with that of pristine CNCs. The theoretical calculations based on density function theory (DFT) further revealed that the strong interaction and high binding energy at the CsPbI₃/PbTe interfaces were responsible for the enhancement of α-phase stability. Moreover, the as-prepared CNHs were used as a deep-red emissive phosphor for assembling light-emitting diode (LED) devices, which demonstrated good prospects for broad applications in the field of indoor lighting, such as full-visible-spectrum and plant growth LEDs.

由于强相互作用，将两种不同材料的纳米结构集成到单个结构中通常可以获得优异的物理性能。在此，我们提出了一种外延生长策略，通过快速热注射方法合成铅基三碘化物钙钛矿/碲化物胶体纳米级异质结构（CsPbI ₃ /PbTe CNHs ）。与原始的 CsPbI ₃相比，所获得的 CNHs 表现出更长的荧光寿命与电荷载流子的辐射复合相关胶体纳米晶体（CNC）。这主要归因于 PbTe 组件实现的表面缺陷钝化，这可以通过时间分辨光谱研究来证明。与原始 CNC 相比，CNH 的稳定性得到了显着提高。基于密度函数理论（DFT）的理论计算进一步表明，CsPbI ₃ /PbTe 界面处的强相互作用和高结合能是增强α相稳定性的原因。此外，所制备的 CNHs 可​​用作组装发光二极管 (LED) 器件的深红色发光荧光粉，在全可见光谱和植物等室内照明领域显示出良好的应用前景。增长 LED。