Journal
ORGANIC ELECTRONICS
Volume 9, Issue 5, Pages 656-660Publisher
ELSEVIER
DOI: 10.1016/j.orgel.2008.04.008
Keywords
pentacene; C-60 solar cell; J-V characteristics; active area; degradation
Funding
- BP Solar
- EPSRC Excitonic Supergen
- Engineering and Physical Sciences Research Council [EP/G031088/1] Funding Source: researchfish
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We demonstrate power conversion efficiencies of 1.5% from molecular photovoltaic devices based on bilayer pentacene/fullerene heterojunctions under 1 sun AM1.5G simulated irradiation. importantly, we demonstrate the independence of the device performance on active area in the range 0.05-0.65 cm(2) a critical consideration for future scaling up to manufacture. A degradation study under constant solar illumination shows two parallel mechanisms for degradation; a photooxidation resulting in a drop of the generated photocurrent, and a UV annealing effect reducing the fill factor, both of which can be eliminated by careful choice of analysis conditions. (C) 2008 Elsevier B.V. All rights reserved.
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