Effect of ZnO nanoparticle morphology and post-treatment with zinc acetate on buffer layer in inverted organic photovoltaic cells

Title
Effect of ZnO nanoparticle morphology and post-treatment with zinc acetate on buffer layer in inverted organic photovoltaic cells
Author
임승순
Keywords
Inverted OPVs; ZnO buffer layer; Particle morphology; Zinc acetate post-treatment
Issue Date
2015-01
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
SOLAR ENERGY, v. 114, Page. 32-38
Abstract
Spherical and rod-shaped ZnO nanoparticles were synthesized through modified sol gel method to investigate the morphological effect in the buffer layer of inverted organic photovoltaic cells (OPVs). Also the buffer layers fabricated with ZnO nanoparticles were post-treated by using zinc acetate dihydrate in methanol (zinc acetate post-treatment) to survey the influence of surface state on buffer layer. After the zinc acetate post-treatment on ZnO buffer layer, the low series resistance (R-s) and high shunt resistance (R-sh) were obtained due to the enhancement of the electric contiguity at the interface (buffer layer/active layer) and interconnectivity between ZnO nanoparticles. By improving the resistance, the current density (J(sc)) and fill factor (FF) of devices were increased. The performance of device fabricated with rod-shaped ZnO particles was higher than that of cell fabricated with spherical ZnO particles because the 1-dimensional rod particles acted as an appropriate bridge to promote the electron mobility. The best power conversion efficiency (2.68%) could be achieved through the facile and effective zinc acetate post-treatment. (C) 2015 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/20.500.11754/21221http://www.sciencedirect.com/science/article/pii/S0038092X15000341
ISSN
0038-092X
DOI
10.1016/j.solener.2015.01.020
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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