標題: Scattering resonance enhanced dye absorption of dye sensitized solar cells at optimized hollow structure size
作者: Tsai, Min-Chiao
Lee, Jeng-Yi
Chang, Ya-Chen
Yang, Min-Han
Chen, Tin-Tin
Chang, I-Chun
Lee, Pei-Chi
Chiu, Hsin-Tien
Lee, Ray-Kuang
Lee, Chi-Young
應用化學系
Department of Applied Chemistry
關鍵字: Mie scattering;Mie theory;Simulation;Resonance;Nanoparticle
公開日期: 5-Dec-2014
摘要: This study elucidates the size effect on dye-sensitized solar cells (DSSCs) by synthesizing highly uniform hierarchical hollow sphere TiO2 samples, with the diameters from 220 nm to 800 nm. Experimental results indicate that the optimum conversion efficiency using N719 dye can be achieved around 5.5%, as the diameter of hierarchical hollow spheres is 450-550 nm. According to the incident photon-to-current conversion efficiency (IPCE) spectra, large-sized hierarchical hollow spheres significantly enhance the light harvesting by scattering; whereas small-sized hallow spheres (<360 nm) improve negligibly. Additionally, mesoporous and solid spheres with an identical diameter, 440 nm in this study, are also studied as a comparison. Our results demonstrate that hollow spheres perform the same conversion efficiency as that of mesoporous spheres owing to the equivalent adsorption of dye molecules in both hierarchical structures - regardless of the surface area of the interior of mesoporous structure, which shows that hollow spheres have higher conversion efficiency per unit volume than that of mesoporous spheres. (C) 2014 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jpowsour.2014.06.015
http://hdl.handle.net/11536/25018
ISSN: 0378-7753
DOI: 10.1016/j.jpowsour.2014.06.015
期刊: JOURNAL OF POWER SOURCES
Volume: 268
Issue: 
起始頁: 1
結束頁: 6
Appears in Collections:Articles


Files in This Item:

  1. 000340311800001.pdf

If it is a zip file, please download the file and unzip it, then open index.html in a browser to view the full text content.