P3HT based solution-processed pseudo bi-layer organic solar cell with enhanced performance
| Autor: | Joachim Luther, Krishnamoorthy Ananthanarayanan, L. N. S. A. Thummalakunta, Chian Haw Yong |
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| Rok vydání: | 2012 |
| Předmět: |
chemistry.chemical_classification
Materials science Fullerene Organic solar cell Analytical chemistry General Chemistry Polymer Condensed Matter Physics Acceptor Electronic Optical and Magnetic Materials law.invention Biomaterials chemistry.chemical_compound Crystallinity chemistry law Phase (matter) Materials Chemistry Thiophene Electrical and Electronic Engineering Crystallization |
| Zdroj: | Organic Electronics. 13:2008-2016 |
| ISSN: | 1566-1199 |
| DOI: | 10.1016/j.orgel.2012.05.054 |
| Popis: | We present a solution-processed pseudo bi-layer organic solar cell with poly(3-hexyl thiophene) (P3HT) as donor and indene-C60 bisadduct (ICBA) as acceptor. The devices were fabricated by sequential processing of the active components followed by a thermal annealing treatment. An efficiency of 5.9% was achieved under AM 1.5G irradiation (1000 W/m2). The obtained efficiency is attributed to an enhanced nanomorphology that arises from the inter-diffusion of the ICBA molecules into a layer of pre-organised polymer (P3HT) and also due to the subsequent crystallisation of the ICBA molecules. These processes facilitate efficient charge generation and extraction. Time of flight-secondary ion mass spectroscopy (TOF-SIMS) depth profiling was carried out for different thermal annealing treatments of these pseudo bi-layer devices, which reveals full inter-diffusion of ICBA into the polymer P3HT. Photo-CELIV (charge extraction by linearly increasing voltage) studies elucidates that the thermal annealing imparts crystallinity to the fullerene phase which results in the improvement of charge carrier mobility. |
| Databáze: | OpenAIRE |
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