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 ($R_{\text{avg}}$) of 2.43% and the solar-weighted reflectance (SWR) of 2.38%, compared to that of a bare GaAs substrate ($R_{\text{avg}}$, 37.50%; SWR, 36.72%) in the wavelength range of 300 to 870 nm.

© 2015 Optical Society of America

Light trapping enhancement induced by bimetallic non-alloyed nanoparticles on a disordered subwavelength flexible thin film crystalline silicon substrate using metal-assisted chemical etching

Soo Kyung Lee, Chee Leong Tan, and Yong Tak Lee
Opt. Lett. 42(3) 431-434 (2017)

Bi-SERS sensing and enhancement by Au-Ag bimetallic non-alloyed nanoparticles on amorphous and crystalline silicon substrate

Chee Leong Tan, Soo Kyung Lee, and Yong Tak Lee
Opt. Express 23(5) 6254-6263 (2015)

High-efficiency light-trapping effect using silver nanoparticles on thin amorphous silicon subwavelength structure

Chee Leong Tan and Yong Tak Lee
Opt. Lett. 38(23) 4943-4945 (2013)

Antireflective disordered subwavelength structure on GaAs using spin-coated Ag ink mask

Chan Il Yeo, Ji Hye Kwon, Sung Jun Jang, and Yong Tak Lee
Opt. Express 20(17) 19554-19562 (2012)

Nano/micro dual-textured antireflective subwavelength structures in anisotropically etched GaAs

Kyunghwan Kim, Yunwon Song, and Jungwoo Oh
Opt. Lett. 42(16) 3105-3108 (2017)