Share Email Print

Proceedings Paper

Understanding the nanophotonic light-trapping structure of diatom frustule for enhanced solar energy conversion: a theoretical and experimental study
Author(s): Xiangfan Chen; Chen Wang; Evan Baker; Jane Wang; Cheng Sun
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Recent designs in nanophotonic light-trapping technologies offer promising potential to develop high-efficiency thin-film solar cell at dramatically reduced cost. However, the lack of a cost effective scalable nanomanufacturing technique remains the main road-block. In nature, diatoms exhibit high solar energy harvesting efficiency due to their frustules (i.e., hard porous cell wall made of silica) possessing remarkable hierarchical nano-features optimized for the photosynthetic process through millions of years evolution. To explore this unique light trapping effect, different species of diatoms (Coscinodiscus sp. and Coscinodiscus wailesii) are cultured and characterized by Scanning electron microscope (SEM). Rigorous Coupled Wave Analysis (RCWA) and Finite-difference time-domain (FDTD) method are employed to numerically study the nanophotonic light-trapping effect. The absorption efficiency is significantly enhanced over the spectrum region centered on 450nm and 700nm where the electric fields are found strongly confined within the active layer. The transmission and reflection spectra are also measured by optical spectroscopy and the experimental results are in good agreement with numerical simulations.

Paper Details

Date Published: 3 March 2014
PDF: 10 pages
Proc. SPIE 8958, Bioinspired, Biointegrated, Bioengineered Photonic Devices II, 89580I (3 March 2014); doi: 10.1117/12.2038529
Show Author Affiliations
Xiangfan Chen, Northwestern Univ. (United States)
Chen Wang, Northwestern Univ. (United States)
Evan Baker, Northwestern Univ. (United States)
Jane Wang, Northwestern Univ. (United States)
Cheng Sun, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 8958:
Bioinspired, Biointegrated, Bioengineered Photonic Devices II
Luke P. Lee; John A. Rogers; Seok Hyun Andy Yun, Editor(s)

© SPIE. Terms of Use
Back to Top