用于增强光捕获的周期性纳米结构砷化镓衬底上的金-银双金属非合金纳米颗粒

AuAg bimetallic nonalloyed nanoparticles on a periodically nanostructured GaAs substrate for enhancing light trapping.

作者信息

Lee Soo Kyung, Tan Chee Leong, Ju Gun Wu, Song Jae Hong, Yeo Chan Il, Lee Yong Tak

出版信息

Opt Lett. 2015 Dec 15;40(24):5798-801. doi: 10.1364/OL.40.005798.

DOI:10.1364/OL.40.005798

Abstract

We present a light trapping structure consisting of AuAg bimetallic nonalloyed nanoparticles (BNNPs) on cone-shaped GaAs subwavelength structures (SWSs), combining the advantages of plasmonic structures and SWSs for GaAs-based solar cell applications. To obtain efficient light trapping in solar cells, the optical properties' dependence on the size and composition of the Ag and Au metal nanoparticles was systematically investigated. Cone-shaped GaAs SWSs with AuAg BNNPs formed from an Au film of 12 nm and an Ag film of 10 nm exhibited the extremely low average reflectance (R(avg)) of 2.43% and the solar-weighted reflectance (SWR) of 2.38%, compared to that of a bare GaAs substrate (R(avg), 37.50%; SWR, 36.72%) in the wavelength range of 300 to 870 nm.

摘要

我们展示了一种由锥形砷化镓亚波长结构（SWSs）上的金-银双金属非合金纳米颗粒（BNNPs）组成的光捕获结构，该结构结合了等离子体结构和SWSs的优势，用于基于砷化镓的太阳能电池应用。为了在太阳能电池中实现高效的光捕获，系统地研究了光学性质对银和金金属纳米颗粒尺寸和组成的依赖性。与裸砷化镓衬底（在300至870nm波长范围内，平均反射率（R(avg)）为37.50%；太阳加权反射率（SWR）为36.72%）相比，由12nm的金膜和10nm的银膜形成的带有金-银BNNPs的锥形砷化镓SWSs表现出极低的平均反射率（R(avg)）为2.43%和太阳加权反射率（SWR）为2.38%。