View : 88 Download: 0

Work function and interface control of amorphous IZO electrodes by MoO3 layer grading for organic solar cells

Title
Work function and interface control of amorphous IZO electrodes by MoO3 layer grading for organic solar cells
Authors
Kim, Hyo-JoongSeo, Ki-WonNoh, Yong-JinNa, Seok-InSohn, AhrumKim, Dong-WookKim, Han-Ki
Ewha Authors
김동욱
SCOPUS Author ID
김동욱scopus
Issue Date
2015
Journal Title
SOLAR ENERGY MATERIALS AND SOLAR CELLS
ISSN
0927-0248JCR Link1879-3398JCR Link
Citation
vol. 141, pp. 194 - 202
Keywords
Zn-doped In2O3MoO3 graded IZOOrganic solar cellsGraded sputteringWork functionHole extraction
Publisher
ELSEVIER SCIENCE BV
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
To control the work function and the interface of transparent anodes for use in organic solar cells (OSCs), we fabricated an amorphous Zn-doped In2O3 (IZO) films with graded MoO3 top layers by using a graded sputtering technique. Electrical, optical, structural, and morphological properties of the MoO3 graded IZO films (MIZO) were investigated in detail by studying MIZO films with various thickness of the MoO3 graded layer. Graded sputtering of the MoO3 layer on the top region of IZO films led to the high work function of 5.23 eV for the amorphous IZO, which was higher than that of the MoO3/IZO double layer, even though MIZO had resistivity similar to that of the IZO single layer. Due to the high work function and high transparency of the MIZO films, OSCs based on the MIZO anode exhibited a power conversion efficiency (PCE) of 3.2%, greater than that of OSCs based on IZO single layer and MoO3/IZO double layer anodes. Based on Kelvin probe measurements and transmission electron microscope examinations, we suggested a possible hole extraction mechanism at the interfaces between the MIZO anode and the PEDOT:PSS buffer layer to explain the higher PCE of OSCs based on MIZO anodes. The successful operation of OSCs on graded MIZO indicated that the graded sputtering technique is a promising coating process allowing modification of surface properties of amorphous IZO anodes without requiring additional solution coating processes. (C) 2015 Elsevier B.V. All rights reserved.
DOI
10.1016/j.solmat.2015.05.036
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE