Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/79059
Title: All-solution-processed metal-oxide-free flexible organic solar cells with over 10% efficiency
Authors: Song, W
Fan, X
Xu, BG 
Yan, F 
Cui, HQ
Wei, Q
Peng, RX
Hong, L
Huang, JM
Ge, ZY
Keywords: All-solution-processing
Flexible organic solar cells
ITO-free
Low-temperature
Issue Date: 2018
Publisher: Wiley-VCH
Source: Advanced materials, 27 June 2018, v. 30, no. 26, 1800075 How to cite?
Journal: Advanced materials 
Abstract: All-solution-processing at low temperatures is important and desirable for making printed photovoltaic devices and also offers the possibility of a safe and cost-effective fabrication environment for the devices. Herein, an all-solution-processed flexible organic solar cell (OSC) using poly(3,4-ethylenedioxythiophene):poly-(styrenesulfonate) electrodes is reported. The all-solution-processed flexible devices yield the highest power conversion efficiency of 10.12% with high fill factor of over 70%, which is the highest value for metal-oxide-free flexible OSCs reported so far. The enhanced performance is attributed to the newly developed gentle acid treatment at room temperature that enables a high-performance PEDOT:PSS/plastic underlying substrate with a matched work function (approximate to 4.91 eV), and the interface engineering that endows the devices with better interface contacts and improved hole mobility. Furthermore, the flexible devices exhibit an excellent mechanical flexibility, as indicated by a high retention (approximate to 94%) of the initial efficiency after 1000 bending cycles. This work provides a simple route to fabricate high-performance all-solution-processed flexible OSCs, which is important for the development of printing, blading, and roll-to-roll technologies.
URI: http://hdl.handle.net/10397/79059
ISSN: 0935-9648
EISSN: 1521-4095
DOI: 10.1002/adma.201800075
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