title: Wrinkled silica/titania nanoparticles with tunable interwrinkle distances for efficient utilization of photons in dye-sensitized solar cells.
abstract: Efficient light harvesting is essential for the realization of high energy conversion efficiency in dye-sensitized solar cells (DSCs). State-of-the-art mesoporous TiO2 photoanodes fall short for collection of long-wavelength visible light photons, and thus there have been efforts on introduction of scattering nanoparticles. Herein, we report the synthesis of wrinkled silica/titania nanoparticles with tunable interwrinkle distances as scattering materials for enhanced light harvesting in DSCs. These particles with more than 20 times larger specific surface area (>400 m(2)/g) compared to the spherical scattering particles (<20 m(2)/g) of the similar sizes gave rise to the dye-loading amounts, causing significant improvements in photocurrent density and efficiency. Moreover, dependence of spectral scattering properties of wrinkled particles on interwrinkle distances, which was originated from difference in overall refractive indices, was observed.
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.|School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Jin Soo
authors.initials: JS
authors.lastname: Kang
authors.affiliation: Department of Chemistry, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Joohyun
authors.initials: J
authors.lastname: Lim
authors.affiliation: School of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, 561-756, Republic of Korea.
authors.forename: Won-Yeop
authors.initials: WY
authors.lastname: Rho
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.|School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Jin
authors.initials: J
authors.lastname: Kim
authors.affiliation: Department of Chemistry, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Doo-Sik
authors.initials: DS
authors.lastname: Moon
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.|School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Juwon
authors.initials: J
authors.lastname: Jeong
authors.affiliation: Department of Chemistry, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Dongwook
authors.initials: D
authors.lastname: Jung
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.|School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Jung-Woo
authors.initials: JW
authors.lastname: Choi
authors.affiliation: Department of Chemistry, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Jin-Kyu
authors.initials: JK
authors.lastname: Lee
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.|School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Yung-Eun
authors.initials: YE
authors.lastname: Sung