Laser ablation deposition of crystalline copper-phthalocyanine thin films

Ina, E.; Matsumoto, N.; Shikada, E.; Kannari, Fumihiko

doi:10.1016/s0169-4332(97)00708-3

Cited by 26 publications

(15 citation statements)

References 9 publications

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“…1 that the window for the deposition of organic ®lms is quite large. This result is also in contrast to the earlier results of Ina et al [7] where they used a low¯uence of 30 mJ/cm 2 . It may be due to the difference KrF laser and the ArF laser wavelengths.…”

contrasting

confidence: 99%

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Pulsed laser deposition of organic thin films

Wang

Kwok

2000

Thin Solid Films

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contrasting

confidence: 99%

“…Recently, ion-assisted deposition (IAD) has been attempted where luminescent devices with higher lumens per watt than thermally evaporated ones were made [6]. Pulsed laser deposition (PLD) with KrF laser has also been applied to deposit copper phthalocyanine (CuPC) and the result was found to be satisfactory [7].…”

Section: Introductionmentioning

confidence: 99%

Pulsed laser deposition of organic thin films

Wang

Kwok

2000

Thin Solid Films

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“…[32][33][34] Although the deposition of almost intact polymers is possible near the ablation threshold fluence, the process is complicated by molecular structures that cannot be subjected to the same bond-breaking and repolymerization scheme used for addition polymers. 11,12,31 Previous reports have described the use of a KrF excimer laser (248 nm) to deposit amorphous copper phthalocyanine (CuPc), aluminum tris-8-hydroxyquinline (Alq 3 ) and 4-dialkylamino-4 -nitrostilbensen (DANS), 32,33 and of a Nd:YAG laser (355 nm) for poly(p-phenylene vinylene) (PPV) films. 34 Although these films were electroluminescent, their efficiencies were not comparable to those of spin-coated or sublimated control materials as a result of losing molecular structure fidelity in the ablative transfer from target to substrate.…”

Section: Ultraviolet (Uv) Pld and Maplementioning

confidence: 99%

Mechanisms of Resonant Infrared Matrix-Assisted Pulsed Laser Evaporation

Torres

Johnson

Haglund

et al. 2011

Critical Reviews in Solid State and Materials Sciences

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For the last decade, a variant of pulsed laser ablation, Resonant-Infrared Matrix-Assisted Pulsed Laser Evaporation (RIR-MAPLE), has been studied as a deposition technique for organic and polymeric materials. RIR-MAPLE minimizes photochemical damage from direct interaction with the intense laser beam by encapsulating the polymer in a high infrared-absorption solvent matrix. This review critically examines the thermally-induced ablation mechanisms resulting from irradiation of cryogenic solvent matrices by a tunable free electron laser (FEL). A semi-empirical model is used to calculate temperatures as a function of time in the focal volume and determine heating rates for different resonant modes in two model solvents, based on the thermodynamics and kinetics of the phase transitions induced in the solvent matrices.Three principal ablation mechanisms are discussed, namely normal vaporization at the surface, normal boiling, and phase explosion. Normal vaporization is a highly inefficient polymer deposition mechanism as it relies on collective collisions with evaporating solvent molecules. Diffusion length calculations for heterogeneously nucleated vapor bubbles show that normal boiling is kinetically limited. During high-power pulsed-FEL irradiation, phase explosion is shown to be the most significant contribution to polymer deposition in RIR-MAPLE. Phase explosion occurs when the target is rapidly heated (10 8 to 10 10 K/s) and the solvent matrix approaches its critical temperature. Spontaneous density stratification (spinodal decay) within the condensed metastable phase leads to rapid homogeneous nucleation of vapor bubbles. As these vapor bubbles interconnect, large pressures build up within the condensed phase, leading to target explosions and recoil-induced ejections of polymer to a near substrate. Phase explosion is a temperature (fluence) threshold-limited process, while surface evaporation can occur even at very low fluences.

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“…La préparation de films organiques, qui s'est développée à partir des années 90, concerne essentiellement des molécules semi-conductrices comme le pentacène [14,15] ou luminescentes, comme le tris-8-hydroxyquinoline d'aluminium (Alq3) ou le complexe cuivre-phtalocyanine (CuPc) [16,17] pour des applications dans le domaine de l'électronique, de l'optique non linéaire et des diodes électroluminescentes organiques (OLED). Ces films sont préparés grâce à des lasers UV de longueurs d'onde s'étendant de 248 nm à 355 nm avec des fluences de l'ordre de quelques dizaines à quelques centaines de mJ/cm 2 , généralement sous vide.…”

Section: Dépôt Par Laser Pulsé Conventionnelunclassified

Élaboration de films de molécules organiques par ablation par laser UV

et al. 2006

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Résumé. Les potentialités des méthodes de dépôt par ablation laser (PLD) pour la préparation de films minces de matériaux organiques sont illustrées par un bref rappel bibliographique et par des résultats expérimentaux concernant des molécules d'intérêt biologique (acides aminés, calix-arènes, protéines). Les films sont préparés par PLD avec un laser KrF sans dégradation de la structure chimique des molécules dans une gamme de fluences de quelques dizaines à quelques centaines de mJ/cm 2 . Les propriétés structurales et optiques des films sont étudiées en fonction de la fluence du laser et mettent en évidence des arrangements moléculaires particuliers induits par cette méthode de dépôt. Le guidage optique a été obtenu pour des films de toutes ces molécules.

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Laser ablation deposition of crystalline copper-phthalocyanine thin films

Cited by 26 publications

References 9 publications

Pulsed laser deposition of organic thin films

Pulsed laser deposition of organic thin films

Mechanisms of Resonant Infrared Matrix-Assisted Pulsed Laser Evaporation

Élaboration de films de molécules organiques par ablation par laser UV

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