Asymmetric photocurrent extraction in semitransparent laminated flexible organic solar cells
| Autor: | Zaifei Ma, Desta Antenehe Gedefaw, Martijn Kemerink, Zheng Tang, Luis Ever Aguirre, Jonas Bergqvist, Mats Andersson, Olle Inganäs, Wanzhu Cai, Armantas Melianas, Thomas Österberg |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Annan kemi
Materials science Organic solar cell TK7800-8360 lcsh:TK7800-8360 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences law.invention Coating PEDOT:PSS law Lamination General Materials Science Electrical and Electronic Engineering Materials of engineering and construction. Mechanics of materials Photocurrent integumentary system business.industry lcsh:Electronics 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Active layer Anode engineering TA401-492 Optoelectronics Electronics 0210 nano-technology business Other Chemistry Topics |
| Zdroj: | npj Flexible Electronics, Vol 2, Iss 1, Pp 1-8 (2018) |
| ISSN: | 2397-4621 |
| Popis: | Scalable production methods and low-cost materials with low embodied energy are key to success for organic solar cells. PEDOT(PSS) electrodes meet these criteria and allow for low-cost and all solution-processed solar cells. However, such devices are prone to shunting. In this work we introduce a roll-to-roll lamination method to construct semitransparent solar cells with a PEDOT(PSS) anode and an polyethyleneimine (PEI) modified PEDOT(PSS) cathode. We use the polymer:PCBM active layer coated on the electrodes as the lamination adhesive. Our lamination method efficiently eliminates any shunting. Extended exposure to ambient degrades the laminated devices, which manifests in a significantly reduced photocurrent extraction when the device is illuminated through the anode, despite the fact that the PEDOT(PSS) electrodes are optically equivalent. We show that degradation-induced electron traps lead to increased trap-assisted recombination at the anode side of the device. By limiting the exposure time to ambient during production, degradation is significantly reduced. We show that lamination using the active layer as the adhesive can result in device performance equal to that of conventional sequential coating. |
| Databáze: | OpenAIRE |
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