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Hierarchically Structured ZnO Film for Dye‐Sensitized Solar Cells with Enhanced Energy Conversion Efficiency
Author(s) -
Chou T. P.,
Zhang Q.,
Fryxell G. E.,
Cao G. Z.
Publication year - 2007
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200602927
Subject(s) - materials science , dye sensitized solar cell , energy conversion efficiency , colloid , spheres , absorption (acoustics) , nanoparticle , light scattering , optoelectronics , nanotechnology , chemical engineering , scattering , optics , composite material , electrode , chemistry , physics , astronomy , engineering , electrolyte
A hierarchically‐structured ZnO film consisting of secondary colloidal spheres of ~ 300 nm in diameter and primary nanoparticles of ~ 20 nm in diameter is shown to have an ~ 83% improvement in the overall light conversion efficiency, when compared to commercially‐obtained ZnO film with ~ 25 nm particles. This increase is attributed to the hierarchical structure, where the secondary colloidal spheres promote light scattering for enhanced photon absorption.