Eobaldt Edwin, Zapf Maximilian, Wolf Gesine, Imani Sam, Nicklaus Johannes, Schönherr Sven, Ronning Carsten
Institute of Solid State Physics, Friedrich Schiller University Jena, 07743, Jena, Germany.
Discov Nano. 2025 Sep 12;20(1):159. doi: 10.1186/s11671-025-04352-1.
Electron microscopy is an essential tool in the fabrication and characterization of optoelectronic devices. This study systematically investigated the stability of zinc oxide nanowires under electron irradiation, focusing on spontaneous and stimulated emission as well as their waveguiding properties. Spontaneous emission initially increases, which we attribute to the desorption of surface species, leading to a reduced surface band bending and enhanced luminescence. However, continued electron irradiation results in hydrocarbon formation on the nanowire surface, increasing waveguiding losses. These increased optical losses, in turn, raise the lasing threshold of nanowire lasers. Our findings offer valuable insights into the electron imaging parameters for optimizing semiconductor nanowires in optoelectronic applications.
电子显微镜是光电器件制造和表征中的重要工具。本研究系统地研究了氧化锌纳米线在电子辐照下的稳定性，重点关注自发发射和受激发射及其波导特性。自发发射最初会增加，我们将其归因于表面物种的解吸，这导致表面能带弯曲减小和发光增强。然而，持续的电子辐照会导致纳米线表面形成碳氢化合物，增加波导损耗。这些增加的光学损耗反过来又提高了纳米线激光器的激光阈值。我们的研究结果为优化光电子应用中的半导体纳米线的电子成像参数提供了有价值的见解。
