2007 Fiscal Year Final Research Report Summary
Growth of π-conjugated nanorods and application to organic fight emitting diodes
| Project/Area Number |
16310098
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Microdevices/Nanodevices
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| Research Institution | Japan Advanced Institute of Science and Technology |
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Principal Investigator |
MURATA Hideyuki Japan Advanced Institute of Science and Technology, School of Materials Science, Associate Professor (10345663)
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| Project Period (FY) |
2004 – 2007
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| Keywords | Conjugated Polymer / Vapor Deposition Polymerization / Organic Device / Chemical modification of silicon |
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| Research Abstract |
Attaching functional organic layers to semiconductor surfaces may have applications in a number of areas, including molecular and biomolecular electronics, sensors and lithography. In this study, we have developed a novel, two-step strategy for the covalent bond formation between aromatic molecules and silicon surfaces. In the first step, a H-terminated Si (III)surface reacts with amino radicals to give a NH_2-terminated Si (III) surface at room temperature. The amino radicals were generated by the thermal decomposition of ammonia gas with Tungsten filament heated at 1000-1200℃. The formation of NH_2-terminated surface and the monolayer was confirmed by X-ray photoelectron spectroscopy (XPS) and Multi Internal Reflection Fourier Transfer Infrared Spectroscopy (MIR FT-IR). In the second step, the reaction of amino-terminated Si surface with an aromatic dialdehydes (1,4-bis (4-formylstyryl)benzene) (BFSB) was carried out by vacuum deposition of BFSB on the substrate heated at 130℃ under high vacuum. The reaction of amino-terminated surface between BFSB and the monolayer formation was confirmed by XPS and MIR FT-IR. Distinct images such as an island structure with the diameter of around 5 nm can be seen in non-contact atomic force microscopy (nc-AFM) images. The islands consist of several dots with the height of each dot was about 2.3 nm. According to the molecular orbital calculation (MOPAC), the length of BFSB molecule is about 2.2 nm. These results suggest that the each dot corresponds to the vertically aligned BFSB molecules. On the other hand, no photoluminescence from BFSB was observed on silicon surface, due to an energy transfer. Next, we have investigated the formation of organic monolayer on indium-tin-oxide (ITO) electrode and the effect to device performance of OLEDs. We have found that the carrier injection efficiency was enhanced by modification of ITO by organic monolayers depending on their chemical structure.
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Research Products
(130 results)
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[Journal Article] Enhanced stability of organic light-emitting devices fabricated under ultra-high vacuum condition2006
Author(s)
Takeshi, Ikeda, Hideyuki, Murata, Yoshiki, Kinoshita, Junichi, Shike, Yoshikazu, Ikeda, Masahiro, Kitano
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Journal Title
Chemical Physics Letters 426
Pages: 111-114
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Scanning Tunneling Microscopy Study of 4,4"-Diamino-p-Terphenyl Adsorbed on Si(III)7×72008
Author(s)
Takashi, Nishimura, Atsushi, Itabashi, Hideyuki, Murata, Masahiko, Tomitori, Toyoko, Arai
Organizer
The 55th Spring Meeting, The Japan Society of Applied Physics
Place of Presentation
Chiba
Year and Date
20080327-30
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Structural and Optical Properties of Porphyrin Nano-Assemblies Prepared by Sonication Method2008
Author(s)
Hideaki, OKI, Atula, S. D. SANDANAYAKA, Taku, HASOBE, Hideyuki, MURATA
Organizer
The 88th Spring Meeting, The Chemical Society of Japan, 2008
Place of Presentation
Chiba, Japan
Year and Date
20080326-28
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Fabricationof Polyazomethin films and application to organic light emitting diodes by vapor deposition polymerization2006
Author(s)
Atsushi, Itabashi, Masao, Fukushima, Taku, Hasobe, Hideyuki, Murata
Organizer
The 53rd Spring Meeting, 2006, The Japan Society of Applied Physics
Place of Presentation
Tokyo, Japan
Year and Date
20060322-26
Description
「研究成果報告書概要(欧文)」より
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[Book] 有機ELディスプレイ2004
Author(s)
時任静士, 安達千波矢, 村田英幸
Total Pages
163
Publisher
オーム社
Description
「研究成果報告書概要(和文)」より
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