基于Pt纳米粒子自组装的金属-绝缘体-金属光二极管的电流密度增强和非对称性
Enhanced Current Density and Asymmetry of Metal-Insulator-Metal Diodes Based on the Self-Assembly of Pt Nanoparticles for Optical Rectennas
摘要：
光学整流天线由纳米天线和纳米级整流二极管组成，为热辐射能量收集应用提供了广阔的前景。为了实现这一点，高电流密度和高不对称性必须同时获得超高速响应光频率的整流二极管。在这项研究中，我们报告了一个金属-绝缘体-金属（MIM）二极管与强烈增强的电场实现通过自组装均匀的Pt纳米粒子（NP）使用原子层沉积。与传统MIM二极管相比，该系统的电流密度和不对称性提高了几个数量级，这是通过塑造隧道势垒来实现的。实验证实，所提出的MIM二极管的二极管效率显著超过没有NP的MIM二极管231倍。此外，所提出的策略可以与各种先进的隧道二极管集成，以实现高性能的光学整流天线。
英文摘要：
Optical rectennas consist of nano-antennas and nano-scale rectifying diodes, providing extensive prospects for thermal radiation energy harvesting applications. To achieve this, high current density and high asymmetry must be simultaneously obtained in rectifying diodes with ultra-high-speed responses to optical frequencies. In this study, we report a metal-insulator-metal (MIM) diode with a strongly enhanced electric field achieved via the self-assembly of uniform Pt nanoparticles (NPs) using atomic layer deposition. An enhancement of several orders of magnitude in the current density and asymmetry of this system in comparison to conventional MIM diodes was realized by shaping the tunneling barrier. The diode efficiency of the proposed MIM diodes experimentally confirmed that significantly exceeds the MIM diode without NPs by 231 times. Furthermore, the proposed strategy can be integrated with various advanced tunnel diodes to achieve high-performance optical rectennas.
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