This material is based upon research supported by the National Science Foundation under Grant No. 0401817. Optical absorption measurements were acquired with the generous assistance of Ir. Annemarie Huijser, Optoelectronic Materials Section, Faculty of Applied Sciences, TU Delft.
The Influence of TiO2 Particle Size in TiO2/CuInS2 Nanocomposite Solar Cells†
Article first published online: 27 JUN 2006
Copyright © 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Functional Materials
Volume 16, Issue 12, pages 1566–1576, August, 2006
How to Cite
O'Hayre, R., Nanu, M., Schoonman, J., Goossens, A., Wang, Q. and Grätzel, M. (2006), The Influence of TiO2 Particle Size in TiO2/CuInS2 Nanocomposite Solar Cells. Adv. Funct. Mater., 16: 1566–1576. doi: 10.1002/adfm.200500647
- Issue published online: 25 JUL 2006
- Article first published online: 27 JUN 2006
- Manuscript Accepted: 11 DEC 2006
- Manuscript Received: 21 SEP 2005
- National Science Foundation. Grant Number: 0401817
- Nanocomposites, metal;
- Solar cells;
The recently developed CuInS2/TiO2 3D nanocomposite solar cell employs a three-dimensional, or “bulk”, heterojunction to reduce the average minority charge-carrier-transport distance and thus improve device performance compared to a planar configuration. 3D nanocomposite solar-cell performance is strongly influenced by the morphology of the TiO2 nanoparticulate matrix. To explore the effect of TiO2 morphology, a series of three nanocomposite solar-cell devices are studied using 9, 50, and 300 nm TiO2 nanoparticles, respectively. The photovoltaic efficiency increases dramatically with increasing particle size, from 0.2 % for the 9 nm sample to 2.8 % for the 300 nm sample. Performance improvements are attributed primarily to greatly improved charge transport with increasing particle size. Other contributing factors may include increased photon absorption and improved interfacial characteristics in the larger-particle-size matrix.