Berlin 2015 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 36: Poster Session I
DS 36.31: Poster
Donnerstag, 19. März 2015, 09:30–12:00, Poster A
Transparent conductive ZnO layers on polymer substrates: thin film deposition and application in organic solar cells — •M Dosmailov1, LN Leonat2, J Patek1, D Roth3, P Bauer3, MC Scharber2, NS Sariciftci2, and JD Pedarnig1 — 1Institute of Applied Physics, Johannes Kepler University Linz, A-4040 Linz, Austria — 2Linz Institute for Organic Solar Cells (LIOS) / Institute of Physical Chemistry, Johannes Kepler University Linz, A-4040 Linz, Austria — 3Institute of Experimental Physics, Johannes Kepler University Linz, A-4040 Linz, Austria
Aluminum doped ZnO (AZO) and pure ZnO thin films are grown on polymer substrates by pulsed-laser deposition and the optical, electrical, and structural film properties are investigated. Laser fluence, substrate temperature, and oxygen pressure are varied to obtain transparent, conductive, and stoichiometric AZO layers on polyethylene terephthalate (PET) that are free of cracks. At low fluence (1 J/cm^2) and low pressure (10^-3 mbar), AZO/PET samples of high optical transmission in the visible range, low electrical sheet resistance, and high figure of merit (FOM) are produced. AZO films on fluorinated ethylene propylene have low FOM. The AZO/PET substrates are used in inverted organic solar cell devices employing P3HT:PCBM as photovoltaic polymer-fullerene bulk heterojunction. The power conversion efficiency is η = 2.1 % with the AZO thin films serving as electron transport layer.