Indium tin oxide modified by titanium dioxide nanoparticles dispersed in poly(N-vinylpyrrolidone) for use as an electron-collecting layer in organic solar cells with an inverted structure
- Indium tin oxide modified by titanium dioxide nanoparticles dispersed in poly(N-vinylpyrrolidone) for use as an electron-collecting layer in organic solar cells with an inverted structure
- Jae Won Shim; Hyeunseok Cheun; Amir Dindar; Yunsang Kim; Yinhua Zhou; Canek Fuentes-Hernandez; 황도경; Joseph W. Perry; Bernard Kippelen
- Issue Date
- Journal of materials research
- VOL 28, NO 3, 535-540
- We report on the photovoltaic properties of polymer solar cells with an inverted structure wherein
the electron-collecting electrode comprises an indium tin oxide (ITO) electrode coated with titanium
dioxide (TiO2) nanoparticles dispersed into poly(N-vinylpyrrolidone) (PVP). The optimization of
performance of polymer solar cells in which the TiO2 concentration in PVP was varied is presented.
Pristine solar cells with the TiO2:PVP-coated ITO electrodes showed S-shape current-voltage
characteristics. The S-shaped feature disappeared after the continuous exposure of the solar cells to
light from an AM 1.5G solar simulator, leading to an improved device performance compared with
solar cells that use an ITO or ITO/TiO2 electron-collecting electrodes.
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