The effect of C60 on the ZnO-nanorod surface in organicinorganic hybrid photovoltaics
Journal
Solar Energy Materials and Solar Cells
Journal Volume
95
Journal Issue
2
Pages
740-744
Date Issued
2011
Author(s)
Abstract
The electrical property of the organicinorganic heterojunctions is one of the important factors affecting the performance of hybrid photovoltaic devices. We introduce a good electron conductor, C60, to modify the surface of ZnO-nanorod arrays in a ZnO-nanorod/poly(3-hexylthiophene):(6,6)-phenyl C 61 butyric acid methyl ester (ZnO/P3HT:PCBM) hybrid photovoltaic structure. We found that there is ∼40% and ∼15% increment in the short circuit current (JSC) and open circuit voltage (VOC), respectively, for the device after C60 modification. By probing the carrier dynamics and the surface property of ZnO-nanorods, the presence of the C60 layer assists the exciton separation and passivates part of the defect states on the ZnO-nanorod surface. The charge transport property at the ZnO/polymer blend interface is, therefore, improved. As a result, higher charge concentration can transfer from the polymer blend to the ZnO-nanorods more effectively and subsequently travel to electrodes leading to the improved performance in the photovoltaic device. © 2010 Elsevier B.V. All rights reserved.
Subjects
C60; Hybrid solar cell; Surface modification; ZnO-nanorod
SDGs
Other Subjects
Butyric acids; C60; Carrier dynamics; Charge concentration; Charge transport properties; Defect state; Electrical property; Hybrid solar cells; Methyl esters; Nanorod arrays; Nanorod surfaces; Organic-inorganic heterojunctions; Organic-inorganic hybrid; Photovoltaic devices; Photovoltaic structures; Photovoltaics; Surface modification; ZnO; Electric charge; Electric properties; Esters; Fatty acids; Heterojunctions; Open circuit voltage; Photovoltaic effects; Polymer blends; Solar cells; Surface properties; Transport properties; Zinc oxide; Nanorods
Type
journal article