Muhammad Naseer, Fu Tao, Liu Qiang, Tang Xiaopin, Deng Zi-Lan, Ouyang Zhengbiao
THz Technical Research Center of Shenzhen University, Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Shenzhen 518060, China.
Key Laboratory of Optoelectronics Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen 518060, China.
Materials (Basel). 2018 Nov 18;11(11):2315. doi: 10.3390/ma11112315.
A highly efficient and broad light absorber capable of wide-angle absorption in the visible and near infrared range is presented and numerically investigated for energy harvesting in a simple geometry. According to the calculated results, the proposed device has a peak absorption level of about 99.95%. The actual absorption efficiency is 76.35%, which is approaching that of complex multilayer absorbers with 88 layers working in the wavelength range of 300 nm to 2000 nm. The electro-optic material has the potential of shifting the absorption peak position, compensating fabrication errors and thus reducing the fabrication technique difficulties. Also, the high electro-optic tunability can be used for filters, infrared detection, and imaging applications. More directly, the proposed absorber can be potentially deployed in solar cells and solar thermals.
本文提出了一种高效且宽带的光吸收体，它能够在可见光和近红外范围内进行广角吸收，并针对其在简单几何结构中的能量收集进行了数值研究。根据计算结果，所提出的器件具有约99.95%的峰值吸收水平。实际吸收效率为76.35%，这已接近在300纳米至2000纳米波长范围内工作的88层复杂多层吸收体的效率。电光材料具有移动吸收峰位置、补偿制造误差从而降低制造技术难度的潜力。此外，高电光可调性可用于滤波器、红外探测和成像应用。更直接地说，所提出的吸收体有潜力应用于太阳能电池和太阳能热利用。
