Jet printing flexible displays

Street, R. A.; Wong, William S.; Ready, S. E.; Chabinyc, Michael L.; Arias, Ana Claudia; Limb, Scott J.; Salleo, Alberto; Lujan, R.

doi:10.1016/s1369-7021(06)71445-6

Cited by 212 publications

(129 citation statements)

References 29 publications

Supporting

Mentioning

127

Contrasting

Unclassified

Order By: Relevance

“…[118] Dünnschichtelektroden finden bereits vielfältige Verwendung in Flachbildschirmen, Solarzellen, Membrantastaturen oder als Radio-Frequency-Distributor(RFD)-Tags, Dünn-schichttransistoren und Ultrahochfrequenz(UHF)-Antennen. [119] Generell ist die Anwendung durch Aspekte der Miniaturisierung, der Gewichtsreduktion sowie der Materialund Kostenersparnis getrieben. Konventionell werden Dünnschichten dabei über Gasphasenmethoden auf einem thermisch stabilen Substrat abgeschieden und nachfolgend lithographisch strukturiert (vgl.…”

Section: Partikuläre Dünnschichtelektrodenunclassified

Nanopartikuläre Funktionsmaterialien

2010

View full text Add to dashboard Cite

Nanopartikuläre Funktionsmaterialien bieten vielfältige Perspektiven für die fortschreitende Miniaturisierung und die zunehmende Komplexität der technischen Entwicklung. Ebenso tragen Nanopartikel maßgeblich zum ressourcenschonenden Einsatz von Stoffen bei. Neben diesen naheliegenden Aspekten beruht die Bedeutung der Nanopartikel jedoch auf ihren grundsätzlich neuartigen Eigenschaften und Funktionen. Diese reichen von photonischen Kristallen und effizienten Leuchtstoffen, Einzelpartikeln und Dünnschichten für elektronische Speicher und Schaltelemente, magnetischen Flüssigkeiten und hochselektiven Katalysatoren, vielfältigen Möglichkeiten zur Veredlung von Oberflächen, neuartigen Materialien und Konzepten zur Energieumwandlung und ‐speicherung, Kontrastmitteln für die molekularbiologische und medizinische Diagnostik bis hin zu grundsätzlich neuartigen Materialformen und ‐strukturen wie Nanocontainern und Superkristallen. Die Realisierung hochwertiger Nanopartikel erfordert dabei bereits während der Materialsynthese die Berücksichtigung vieler Einflussgrößen, die Partikelkern, Partikeloberflächen, kolloidale Eigenschaften und Partikelabscheidung betreffen. Eine sinnvolle Eigenschaftscharakterisierung und ‐bewertung bedingt dabei die Einbindung vielfältiger Kompetenzen aus unterschiedlichsten Fachgebieten. Dieses Umfeld macht insgesamt Anspruch als auch Reiz für den “Nanowissenschaftler” aus.

show abstract

Section: Partikuläre Dünnschichtelektrodenunclassified

Nanopartikuläre Funktionsmaterialien

2010

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6] Several OFET devices containing organic semiconducting materials exhibit high electronic performance comparable to or surpassing those with amorphous hydrogenated silicon (a-Si:H). [7,8] .…”

mentioning

confidence: 99%

Pentacene Nanostructures on Surface‐Hydrophobicity‐Controlled Polymer/SiO₂ Bilayer Gate‐Dielectrics

et al. 2007

View full text Add to dashboard Cite

Organic field-effect transistors (OFETs) are of great interest for applications in low-cost disposable electronic devices such as smart cards and radio-frequency identification tags, as well as in flexible-display driver circuits, nonvolatile memory, and sensors. [1][2][3][4][5][6] Several OFET devices containing organic semiconducting materials exhibit high electronic performance comparable to or surpassing those with amorphous hydrogenated silicon (a-Si:H). [7,8] . [9,10] For OFETs, high performance has been achieved by controlling the semiconducting molecular architecture as well as the film growth conditions via optimization of the substrate deposition temperature, deposition rate, and dielectric surface chemistry, all of which significantly affect crystalline morphology and structure in thermally evaporated films. As mentioned by the previous model of nucleation and growth of pentacene, [11] in particular, the molecular orientation and crystalline morphology of the first seeding layer strongly depend on molecule-substrate interactions, which can be controlled by surface functionalization, epitaxy, and the roughness of the gate dielectric. [10,[12][13][14][15] In general, gate-dielectric surface properties have been modified using self-assembled monolayers (SAMs). [10,14,15] For example, octadecyltrichlorosilane (OTS)-or hexamethyldisilazane (HMDS)-treated SiO 2 dielectrics enhance the fieldeffect mobility and decrease the gate leakage of most OFETs. [10,16] The dielectric surface has also been tuned by depositing a secondary polymer film onto a primary inorganic gate dielectric, because a polymeric dielectric by itself requires a very thick layer to achieve low gate leakage.[17] In contrast to SAM-treated SiO 2 dielectrics, one key advantage of polymer-coated gate dielectrics is that polymeric film deposition is not limited by SAM-inorganic coupling, which determines surface epitaxy and the coverage of SAMs.[18] Accordingly, many investigations have focused on simply processible bilayer dielectric strategies to enhance field-effect mobility, [19][20][21][22] yet the effect of both SAM-treated and polymer-coated dielectric surface properties on crystalline nanostructures and device performance of thermally evaporated semiconductors is seldom discussed. We herein elucidate crystalline morphologies and structures of pentacene in thin films that are vacuum-deposited on a surface-hydrophobicity-controlled ultrathin polymeric layer/ 300 nm thick SiO 2 bilayer gate-dielectrics with similar surface roughness. Synchrotron-based 2D grazing-incidence X-ray diffraction (2D GIXD) and atomic force microscopy (AFM) have uncovered that a dielectric with a higher surface energy than the lowest surface energy plane of pentacene induces a 3D island structure of the first seeding crystals, further growing two crystalline phases with different layer spacings and surface orientations. The field-effect mobility of pentacenebased OFETs can be enhanced by a factor of ca. 3 through optimizing surface energy of bilayer polymer/inorga...

show abstract

“…Although there are many attractive benefits offered by a plastic electronics implementation such as OPEN ACCESS process simplicity and reduced manufacture costs [1][2][3] a principal drawback, which must frequently be addressed by the organic electronics community, is the degradation of electronic performance in a proposed device configuration. Degradation phenomena are commonly manifested through prolonged device operation under normal ambient conditions and often involve irreversible oxidation processes that are initiated via molecular excitation.…”

Section: Introductionmentioning

confidence: 99%

Trap Generation Dynamics in Photo-Oxidised DEH Doped Polymers

Goldie¹

2015

Coatings

View full text Add to dashboard Cite

A series of polyester films doped with a hole transport molecule, p-diethylaminobenzaldehyde-1,1'-diphenylhydrazone (DEH), have been systematically exposed to ultraviolet radiation with a peak wavelength of about 375 nm. The electronic performance of the films, evaluated using time-of-flight and space-charge current injection methods, is observed to continuously degrade with increasing ultraviolet exposure. The degradation is attributed to photo cyclic oxidation of DEH that results in the creation of indazole (IND) molecules which function as bulk hole traps. A proposed model for the generation dynamics of the IND traps is capable of describing both the reduction in current injection and the associated time-of-flight hole mobility provided around 1% of the DEH population produce highly reactive photo-excited states which are completely converted to indazole during the UV exposure period. The rapid reaction of these states is incompatible with bulk oxygen diffusion-reaction kinetics within the films and is attributed to the creation of excited states within the reaction radius of soluble oxygen. It is suggested that encapsulation strategies to preserve the electronic integrity of the films should accordingly focus upon limiting the critical supply of oxygen for photo cyclic reaction.

show abstract

Jet printing flexible displays

Cited by 212 publications

References 29 publications

Nanopartikuläre Funktionsmaterialien

Nanopartikuläre Funktionsmaterialien

Pentacene Nanostructures on Surface‐Hydrophobicity‐Controlled Polymer/SiO₂ Bilayer Gate‐Dielectrics

Trap Generation Dynamics in Photo-Oxidised DEH Doped Polymers

Contact Info

Product

Resources

About

Jet printing flexible displays

Cited by 212 publications

References 29 publications

Nanopartikuläre Funktionsmaterialien

Nanopartikuläre Funktionsmaterialien

Pentacene Nanostructures on Surface‐Hydrophobicity‐Controlled Polymer/SiO2 Bilayer Gate‐Dielectrics

Trap Generation Dynamics in Photo-Oxidised DEH Doped Polymers

Contact Info

Product

Resources

About

Pentacene Nanostructures on Surface‐Hydrophobicity‐Controlled Polymer/SiO₂ Bilayer Gate‐Dielectrics