Semiconductor-nanoantenna-assisted solar absorber for ultra-broadband light trapping
- Resource Type
- article
- Authors
- Yuyin Li; Zhengqi Liu; Pingping Pan; Xiaoshan Liu; Guolan Fu; Zhongmin Liu; Haimei Luo; Guiqiang Liu
- Source
- Nanoscale Research Letters, Vol 15, Iss 1, Pp 1-6 (2020)
- Subject
- Solar absorbers
Nanoantennas
Short-circuit current density
Light trapping
Materials of engineering and construction. Mechanics of materials
TA401-492
- Language
- English
- ISSN
- 1556-276X
Abstract Light trapping is an important performance of ultra-thin solar cells because it cannot only increase the optical absorption in the photoactive region but it also allows for the efficient absorption with very little materials. Semiconductor-nanoantenna has the ability to enhance light trapping and raise the transfer efficiency of solar energy. In this work, we present a solar absorber based on the gallium arsenide (GaAs) nanoantennas. Near-perfect light absorption (above 90%) is achieved in the wavelength which ranges from 468 to 2870 nm, showing an ultra-broadband and near-unity light trapping for the sun’s radiation. A high short-circuit current density up to 61.947 mA/cm2 is obtained. Moreover, the solar absorber is with good structural stability and high temperature tolerance. These offer new perspectives for achieving ultra-compact efficient photovoltaic cells and thermal emitters.