16th International Conference on Positron Annihilation | |
Infiltration and Selective Interactions at the Interface in Polymer-Oxide Hybrid Solar Cells | |
Ferragut, R.^1,2 ; Aghion, S.^1,2 ; Moia, F.^1,2 ; Binda, M.^3 ; Canesi, E.V.^3 ; Lanzani, G.^3 ; Petrozza, A.^3 | |
LNESS, Dipartimento di Fisica, Politecnico di Milano, via Anzani 42, 22100 Como, Italy^1 | |
Istituto Nazionale di Fisica Nucleare, Via Celoria 16, 20133 Milan, Italy^2 | |
Center for Nano Science and Technology at Polimi, Istituto Italiano di Tecnologia, Via Pascoli 70/3, 20133 Milan, Italy^3 | |
关键词: Coincidence doppler broadening; Device performance; Hybrid solar cells; Implantation energies; Nanoporous structures; Poly-3-hexylthiophene; Quantitative evaluation; Selective interaction; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/443/1/012051/pdf DOI : 10.1088/1742-6596/443/1/012051 |
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来源: IOP | |
【 摘 要 】
Positron annihilation spectroscopy was used to characterize polymer-based hybrid solar cells formed by poly(3-hexylthiophene) (P3HT) finely infiltrated in a porous TiO2skeleton. A step-change improvement in the device performance is enabled by engineering the hybrid interface by the insertion of a proper molecular interlayer namely 4-mercaptopyridine (4-MP). In order to obtain depth-resolved data, positrons were implanted in the sample using a variable-energy positron beam. The characteristics of the partially filled nanoporous structures were evaluated in terms of the depth profile of the positronium yield and the S-parameter. A quantitative evaluation of the pore filling in the deep region is given from the analysis of Coincidence Doppler Broadening taken at fixed implantation energy. We note a remarkable difference in terms of the positronium yield when the 4-MP interlayer is introduced, which means a better covering of P3HT on the porous surface.
【 预 览 】
Files | Size | Format | View |
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Infiltration and Selective Interactions at the Interface in Polymer-Oxide Hybrid Solar Cells | 461KB | download |