Journal
ORGANIC ELECTRONICS
Volume 27, Issue -, Pages 197-201Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2015.09.020
Keywords
Organic semiconductors; Organic solar cells; Organic photovoltaics; Small-molecules; Electron acceptors; Non-fullerene
Funding
- NSERC Discovery Program [RGPIN 435715, RGPIN 04809]
- NSERC CREATE DREAMS
- Canada Research Chairs
- Canada Foundation for Innovation
- NSERC Photovoltaic Innovation Network
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The importance of device structure and active-layer processing when screening non-fullerene acceptors was demonstrated through the organic solar cell device performance optimization of a solution processable non-fullerene, all small-molecule bulk heterojunction (BHJ) blend. Key tuning parameters were identified; notably, the largest improvement in performance was achieved by switching from the conventional device architecture (ITO/PEDOT:PSS/D-A BHJ/Ca/Al) to an inverted structure (ITO/ZnO/D-A BHJ/MoOx/Ag), approximately doubling the power conversion efficiency from best cells of 0.5%-1.0%, demonstrating the importance of investigating more than a single architecture when screening novel non-fullerene acceptors. (C) 2015 Elsevier B.V. All rights reserved.
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