Efficient Organic Semiconductors Containing Fluorine-Substituted Benzothiadiazole for Solution-Processed Small Molecule Organic Solar Cells
| Autor: | Sanghyun Paek, Kihyung Song, Jaejung Ko, Moo-Jin Jun, Jae Kwan Lee, Nara Cho |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Organic solar cell Energy conversion efficiency chemistry.chemical_element Photochemistry Small molecule Acceptor Polymer solar cell Surfaces Coatings and Films Electronic Optical and Magnetic Materials Organic semiconductor chemistry.chemical_compound General Energy Terthiophene chemistry Fluorine Organic chemistry Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Physical Chemistry C. 116:23205-23213 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp305989g |
| Popis: | The synthesis and photovoltaic characteristics of new organic semiconductors, [bisDMFA-Th]-BT-HxTh3 (1), [bisDMFA-Th]-MonoF-BT-HxTh3 (2), and [bisDMFA-Th]-DiF-BT-HxTh3 (3), are reported. These semiconductors have an unsymmetrical donor A–acceptor–donor B (DA-A-DB) framework composed of a benzothiadiazole (BT; fluorinated or unfluorinated) acceptor between two different donors, bisDMFA and terthiophene. We have demonstrated that these compounds are suitable for use in p-type organic semiconductors for high efficiency solution-processed small molecule organic solar cells (SMOSCs), for which we achieved a remarkable power conversion efficiency of 4.24% with a maximum Voc of 0.89 V. The fluorine substitution on BT decreased its HOMO level and increased hole mobilities of [bisDMFA-Th]-BT-HxTh3 derivatives, leading to an increased Voc in the SMOSCs and improved hole carrier transport properties of the material. In addition, we determined that the insertion of a TiOx functional layer into a bulk heterojunction (... |
| Databáze: | OpenAIRE |
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