Light-induced magnetoresistance in solution-processed planar hybrid devices measured under ambient conditions
| Autor: | Karla Hiller, Dietrich R. T. Zahn, Daniel Bülz, Sreetama Banerjee, Danny Reuter, Georgeta Salvan |
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| Přispěvatelé: | Publica |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Letter
Materials science Magnetoresistance General Physics and Astronomy 02 engineering and technology HED-TIEs lcsh:Chemical technology 01 natural sciences lcsh:Technology law.invention Pentacene chemistry.chemical_compound Planar law 0103 physical sciences Nanotechnology General Materials Science lcsh:TP1-1185 Electrical and Electronic Engineering lcsh:Science 010302 applied physics Photocurrent TIPS-pentacene Organic field-effect transistor business.industry lcsh:T Transistor hybrid electronic devices 021001 nanoscience & nanotechnology lcsh:QC1-999 organic field-effect transistors (OFETs) Nanoscience chemistry Electrode Optoelectronics Degradation (geology) planar hybrid devices lcsh:Q 0210 nano-technology business organic magnetoresistance lcsh:Physics |
| Zdroj: | Beilstein Journal of Nanotechnology, Vol 8, Iss 1, Pp 1502-1507 (2017) Beilstein Journal of Nanotechnology |
| ISSN: | 2190-4286 |
| Popis: | We report light-induced negative organic magnetoresistance (OMAR) measured in ambient atmosphere in solution-processed 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) planar hybrid devices with two different device architectures. Hybrid electronic devices with trench-isolated electrodes (HED-TIE) having a channel length of ca. 100 nm fabricated in this work and, for comparison, commercially available pre-structured organic field-effect transistor (OFET) substrates with a channel length of 20 µm were used. The magnitude of the photocurrent as well as the magnetoresistance was found to be higher for the HED-TIE devices because of the much smaller channel length of these devices compared to the OFETs. We attribute the observed light-induced negative magnetoresistance in TIPS-pentacene to the presence of electron–hole pairs under illumination as the magnetoresistive effect scales with the photocurrent. The magnetoresistance effect was found to diminish over time under ambient conditions compared to a freshly prepared sample. We propose that the much faster degradation of the magnetoresistance effect as compared to the photocurrent was due to the incorporation of water molecules in the TIPS-pentacene film. |
| Databáze: | OpenAIRE |
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