期刊
SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷 96, 期 1, 页码 244-250出版社
ELSEVIER
DOI: 10.1016/j.solmat.2011.10.001
关键词
Organic solar cells; Semi-transparent devices; Transparent conductive electrodes; Carbon nanotubes; Lamination; Orthogonal liquids
资金
- European Union (EFRE)
- Fraunhofer Gesellschaft
- Free State of Saxony as part of the Dresdner Innovationszentrum Energieeffizienz
- DOE STTR
- Welch Foundation [AT-1617]
- Rice/AFRL via CONTACT consortium of Texas
- Alexander von Humboldt Foundation
We have developed semi-transparent n-i-p organic solar cells (OSC) with free-standing multi-wall carbon nanotube (f-CNT) sheets as transparent top electrodes. By a simple and damage-free room temperature orthogonal liquid solution assisted self-laminating process, f-CNT top electrodes are successfully deposited on top of ZnPc:C-60 bulk heterojunction small molecule OSCs. The cells show high fill factors above 58% as well as efficiencies up to 1.5% and greater long-term stability compared to the device having a metal electrode. For the given cell structure with f-CNT semi-transparent electrodes, the influence of an optical spacer on light absorption is studied by a systematic variation of the hole transport layer thickness, supported by optical simulations. The results strongly indicate that OSCs with f-CNT top electrodes and optimized thin film stack are highly promising for semi-transparent OSCs, which can be used in tandem devices, in tinted smart windows, and similar applications by a simple and damage-free process in roll-to-roll configuration that can be scaled to large area manufacturing. (C) 2011 Elsevier B.V. All rights reserved.
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