Spatially correlated charge transport in organic thin film transistors
Hole mobility in organic ultrathin film field-effect transistors is studied as a function of the coverage. For layered sexithienyl films, the charge carrier mobility rapidly increases with increasing coverage and saturates at a coverage of about two monolayers. This shows that the first two molecula...
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| Veröffentlicht in: | Physical review letters 2004-03, Vol.92 (11), p.116802.1-116802.4, Article 116802 |
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| container_end_page | 116802.4 |
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| container_issue | 11 |
| container_start_page | 116802.1 |
| container_title | Physical review letters |
| container_volume | 92 |
| creator | DINELLI, Franco MURGIA, Mauro LEVY, Pablo CAVALLINI, Massimiliano BISCARINI, Fabio DE LEEUW, Dago M |
| description | Hole mobility in organic ultrathin film field-effect transistors is studied as a function of the coverage. For layered sexithienyl films, the charge carrier mobility rapidly increases with increasing coverage and saturates at a coverage of about two monolayers. This shows that the first two molecular layers next to the dielectric interface dominate the charge transport. A quantitative analysis of spatial correlations shows that the second layer is crucial, as it provides efficient percolation pathways for carriers generated in both the first and the second layers. The upper layers do not actively contribute either because their domains are smaller than the ones in the second layer or because the carrier density is negligible. |
| doi_str_mv | 10.1103/physrevlett.92.116802 |
| format | Article |
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For layered sexithienyl films, the charge carrier mobility rapidly increases with increasing coverage and saturates at a coverage of about two monolayers. This shows that the first two molecular layers next to the dielectric interface dominate the charge transport. A quantitative analysis of spatial correlations shows that the second layer is crucial, as it provides efficient percolation pathways for carriers generated in both the first and the second layers. 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For layered sexithienyl films, the charge carrier mobility rapidly increases with increasing coverage and saturates at a coverage of about two monolayers. This shows that the first two molecular layers next to the dielectric interface dominate the charge transport. A quantitative analysis of spatial correlations shows that the second layer is crucial, as it provides efficient percolation pathways for carriers generated in both the first and the second layers. The upper layers do not actively contribute either because their domains are smaller than the ones in the second layer or because the carrier density is negligible.</description><subject>Applied sciences</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures</subject><subject>Electronic transport phenomena in thin films and low-dimensional structures</subject><subject>Electronics</subject><subject>Exact sciences and technology</subject><subject>Field effect devices</subject><subject>General theory, scattering mechanisms</subject><subject>Physics</subject><subject>Semiconductor electronics. Microelectronics. Optoelectronics. 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Microelectronics. Optoelectronics. Solid state devices</topic><topic>Transistors</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>DINELLI, Franco</creatorcontrib><creatorcontrib>MURGIA, Mauro</creatorcontrib><creatorcontrib>LEVY, Pablo</creatorcontrib><creatorcontrib>CAVALLINI, Massimiliano</creatorcontrib><creatorcontrib>BISCARINI, Fabio</creatorcontrib><creatorcontrib>DE LEEUW, Dago M</creatorcontrib><collection>Pascal-Francis</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Physical review letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>DINELLI, Franco</au><au>MURGIA, Mauro</au><au>LEVY, Pablo</au><au>CAVALLINI, Massimiliano</au><au>BISCARINI, Fabio</au><au>DE LEEUW, Dago M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Spatially correlated charge transport in organic thin film transistors</atitle><jtitle>Physical review letters</jtitle><addtitle>Phys Rev Lett</addtitle><date>2004-03-19</date><risdate>2004</risdate><volume>92</volume><issue>11</issue><spage>116802.1</spage><epage>116802.4</epage><pages>116802.1-116802.4</pages><artnum>116802</artnum><issn>0031-9007</issn><eissn>1079-7114</eissn><coden>PRLTAO</coden><abstract>Hole mobility in organic ultrathin film field-effect transistors is studied as a function of the coverage. For layered sexithienyl films, the charge carrier mobility rapidly increases with increasing coverage and saturates at a coverage of about two monolayers. This shows that the first two molecular layers next to the dielectric interface dominate the charge transport. A quantitative analysis of spatial correlations shows that the second layer is crucial, as it provides efficient percolation pathways for carriers generated in both the first and the second layers. The upper layers do not actively contribute either because their domains are smaller than the ones in the second layer or because the carrier density is negligible.</abstract><cop>Ridge, NY</cop><pub>American Physical Society</pub><pmid>15089158</pmid><doi>10.1103/physrevlett.92.116802</doi><tpages>1</tpages></addata></record> |
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| subjects | Applied sciences Condensed matter: electronic structure, electrical, magnetic, and optical properties Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Electronic transport phenomena in thin films and low-dimensional structures Electronics Exact sciences and technology Field effect devices General theory, scattering mechanisms Physics Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Transistors |
| title | Spatially correlated charge transport in organic thin film transistors |
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