Lazzaro Giuliana, Galletta Maurilio, Ielo Ileana, Irrera Alessia, Lo Faro Maria Josè, Leonardi Antonio Alessio, Nastasi Francesco, Puntoriero Fausto
Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università degli Studi di Messina and Centro Interuniversitario per la Conversione dell'Energia Solare (SOLARCHEM), via F. Stagno d'Alcontres 31, Messina 98166, Italy.
CNR-IMM, viale F. Stagno d'Alcontres 31, Messina 98158, Italy.
ACS Omega. 2025 Aug 27;10(35):39606-39614. doi: 10.1021/acsomega.5c02574. eCollection 2025 Sep 9.
Silicon plays a crucial role in modern microelectronics and telecommunications. Recent advancements in nanotechnology have expanded its applications, particularly in photonics. Quantum confinement effects in silicon nanostructures, such as nanocrystals and nanowires (Si NWs), enable light emission in the visible-to-near-infrared (IR) spectrum at room temperature. Among these, Si NWs are particularly promising as they are compatible with existing microelectronic fabrication processes. Given the importance of near-IR light sources for telecommunications, research has focused on enhancing the silicon-based emission in this spectral range. This study presents the development of a hybrid light-harvesting antenna composed of quantum-confined Si NWs and Ru-(II)/Os-(II)-based dendrons. By leveraging energy transfer processes, these hybrid systems achieve near-IR emission at ∼920 nm with a remarkable 99.5% efficiency, as confirmed by lifetime measurements. The dye was anchored to the Si NWs via a carboxyl-functionalized bipyridine ligand, enhancing the stability of these hybrid systems. The demonstrated Si NWs/RuOs hybrid antenna offers significant advantages, including high energy transfer efficiency, stability, and compatibility with cost-effective silicon technology making these structures promising candidate for photonic applications.
硅在现代微电子和电信领域发挥着至关重要的作用。纳米技术的最新进展扩展了其应用，特别是在光子学方面。硅纳米结构（如纳米晶体和纳米线（Si NWs））中的量子限制效应使得在室温下能够在可见光到近红外（IR）光谱范围内发光。其中，Si NWs特别有前景，因为它们与现有的微电子制造工艺兼容。鉴于近红外光源对电信的重要性，研究集中在增强该光谱范围内基于硅的发射。本研究展示了一种由量子限制的Si NWs和基于Ru-(II)/Os-(II)的树枝状分子组成的混合光捕获天线的开发。通过利用能量转移过程，这些混合系统在约920 nm处实现了近红外发射，寿命测量证实其效率高达99.5%。染料通过羧基官能化的联吡啶配体锚定在Si NWs上，增强了这些混合系统的稳定性。所展示的Si NWs/RuOs混合天线具有显著优势，包括高能量转移效率、稳定性以及与经济高效的硅技术的兼容性，使得这些结构成为光子应用的有前途的候选者。
