Please use this identifier to cite or link to this item: http://ktisis.cut.ac.cy/handle/10488/9120
Title: The appearance of Ti3+ states in solution-processed TiOx buffer layers in inverted organic photovoltaics
Authors: Zhidkov, Ivan S. 
McLeod, John A. 
Kurmaev, Ernst Z. 
Korotin, Michael A. 
Kukharenko, Andrey I. 
Savva, Achilleas 
Choulis, Stelios A. 
Korotin, Dm M. 
Cholakh, Seif O. 
Keywords: Organic photovoltaic (OPV)
Electronic structure
Energy gap
Issue Date: 11-Jul-2016
Publisher: American Institute of Physics Inc.
Source: Applied Physics Letters, 2016, Volume 109, Issue 2, Article number 022108
Abstract: We study the low-temperature solution processed TiOx films and device structures using core level and valence X-ray photoelectron spectroscopy (XPS) and electronic structure calculations. We are able to correlate the fraction of Ti3+ present as obtained from Ti 2p core level XPS with the intensity of the defect states that appear within the band gap as observed with our valence XPS. Constructing an operating inverted organic photovoltaic (OPV) using the TiOx film as an electron selective contact may increase the fraction of Ti3+ present. We provide evidence that the number of charge carriers in TiOx can be significantly varied and this might influence the performance of inverted OPVs.
URI: http://ktisis.cut.ac.cy/handle/10488/9120
ISSN: 00036951
Rights: © 2016 Author(s).
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