Title :
Assessment of Optical Absorption in Carbon Nanotube Photovoltaic Device by Electromagnetic Theory
Author :
Chen, Changxin ; Yang, Liu ; Lu, Yang ; Xiao, Gaobiao ; Zhang, Yafei
Author_Institution :
Res. Inst. of Micro/Nano Sci. & Technol., Shanghai Jiao Tong Univ., Shanghai
fDate :
5/1/2009 12:00:00 AM
Abstract :
An electromagnetic (EM) scattering model is built for a kind of single-walled carbon nanotube (SWCNT) photovoltaic device excited by light. In this model, the exciting light is treated as classical EM wave with a very high frequency, and the SWCNTs in the device were treated as a lossy dielectric cylinder with frequency-dependent complex permittivity. Based on the EM scattering model, the Foldy-Lax multiple-scattering equation for the SWCNT cylinders can be derived, and then, the absorbed power of SWCNTs can be estimated. We also use EM simulation software - high frequency structure simulator (HFSS) - to extract the optical absorption of SWCNTs, and then the property of optical absorption of the device is studied more carefully; and the EM scattering model is also validated through HFSS simulation. From the results, some advices are given for the design of such kind of device.
Keywords :
carbon nanotubes; light absorption; permittivity; photovoltaic cells; EM simulation software; Foldy-Lax multiple-scattering equation; carbon nanotube photovoltaic device; electromagnetic scattering model; electromagnetic theory; frequency-dependent complex permittivity; high frequency structure simulator; lossy dielectric cylinder; optical absorption; single-walled carbon nanotube; Electromagnetic (EM) scattering; high frequency structure simulator (HFSS); optical absorption; photovoltaic device; single-walled carbon nanotube (SWCNT);
Journal_Title :
Nanotechnology, IEEE Transactions on
Conference_Location :
12/12/2008 12:00:00 AM
DOI :
10.1109/TNANO.2008.2010493