Optical properties of SrTiO 3 thin films by pulsed laser deposition

Du, Yong; Zhang, M.-S.; Jian-gang, WU; Lee, Kang; Yang, Sen; Wu, Peiheng; Zhang, Yin

doi:10.1007/s00339-002-1998-z

Cited by 67 publications

(30 citation statements)

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“…For the polycrystalline film, the film is wellcrystallized with more densification leading to significant improvement in the packing density up to as high as 0.95. This obtained value is larger than the polycrystalline STO films prepared by PLD (P ¼ 0.90) [14], RF sputtering (P ¼ 0.93) [20], and the sol-gel method (P ¼ 0.75) [22] at the same substrate or annealing temperature of 600 8C. The obtained packing densities show a good consistency with the densities evaluated from the GIXRR curves, as discussed above.…”

Section: Optical Propertiessupporting

confidence: 83%

“…During the past several years, transparent STO thin films have been prepared by several deposition techniques, such as pulsed laser deposition (PLD) [14,15], chemical vapor deposition (CVD) [16], metal-organic deposition (MOD) [17], liquid phase epitaxy (LPE) [18], RF sputtering [19,20], and sol-gel [21,22]. Among these methods, PLD and MBE have the ability to produce excellent film quality [23].…”

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confidence: 99%

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Optical and mechanical properties of transparent SrTiO₃ thin films deposited by ECR ion beam sputter deposition

Panomsuwan

Takai

Saito

2012

Physica Status Solidi (a)

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SrTiO 3 (STO) thin films have been deposited on glass substrates by electron cyclotron resonance (ECR) ion beam sputter deposition at different substrate temperatures (100-600 8C). The structural characteristics of the deposited films show a transition from amorphous phase to polycrystalline phase at 600 8C. The films exhibit good transparency with an interference pattern in the visible region and a very smooth surface without cracks. The refractive index of the films increases with an increase of the substrate temperature, and their dispersion was analyzed by a single-oscillator model. The extinction coefficient of the films in the visible region is of the order of 10 À3 -10 À2. The estimated values of the direct and indirect bandgap energies for the polycrystalline STO film are 3.80 and 3.32 eV, respectively. Its density is almost identical to the bulk STO single crystal, which is relatively high in comparison with those prepared by other techniques. The mechanical stability of the films is also improved with an increase of substrate temperature. Young's modulus and hardness of the polycrystalline STO film are 194.1 AE 15.5 and 22.5 AE 2.0 GPa, respectively.

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Section: Optical Propertiessupporting

confidence: 83%

mentioning

confidence: 99%

Optical and mechanical properties of transparent SrTiO₃ thin films deposited by ECR ion beam sputter deposition

Panomsuwan

Takai

Saito

2012

Physica Status Solidi (a)

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“…The optical band gap (E g ) is related to the optical absorption coefficient and the incident photon energy as follows [65,66]:…”

Section: Optical Characterizationmentioning

confidence: 99%

“…The calibration of the system was achieved by using a standard reflector sample (reflectance, R = 1.00 from Spectralon disk). The optical band gap of the TiO 2 films was estimated from reflectance spectra using the Tauc plot method [65,80,81]. …”

Section: Structural and Optical Characterizationsmentioning

confidence: 99%

Photocatalytic TiO2 Nanorod Spheres and Arrays Compatible with Flexible Applications

et al. 2017

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Abstract:In the present study, titanium dioxide nanostructures were synthesized through microwave irradiation. In a typical microwave synthesis, nanorod spheres in the powder form were simultaneously produced with nanorod arrays grown on polyethylene terephthalate (PET) substrates. The syntheses were performed in water or ethanol with limited temperature at 80 • C and 200 • C. A simple and low-cost approach was used for the arrays growth, which involved a PET substrate with a zinc oxide seed layer deposited by spin-coating. X-ray diffraction (XRD) and Raman spectroscopy revealed that synthesis in water result in a mixture of brookite and rutile phases, while using ethanol as solvent it was only observed the rutile phase. Scanning electron microscopy (SEM) showed that the synthesized spheres were in the micrometer range appearing as aggregates of fine nanorods. The arrays maintained the sphere nanorod aggregate structures and the synthesis totally covered the flexible substrates. Transmission electron microscopy (TEM) was used to identify the brookite structure. The optical band gaps of all materials have been determined from diffuse reflectance spectroscopy. Photocatalytic activity was assessed from rhodamine B degradation with remarkable degradability performance under ultraviolet (UV) radiation. Reusability experiments were carried out for the best photocatalyst, which also revealed notable photocatalytic activity under solar radiation. The present study is an interesting and competitive alternative for the photocatalysts existing nowadays, as it simultaneously results in highly photoactive powders and flexible materials produced with low-cost synthesis routes such as microwave irradiation.

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“…Donde W toma el valor de la unidad cerca del frente de absorción [94], E g es el band gap óptico, B a , d y γ son constantes. Siendo γ = 2 para transmisiones directas [95], quedando la ecuación:…”

Section: Electrodeposiciónunclassified

Modelo de nucleación y crecimiento de capas nanoestructuradas de óxido de zinc sobre sustratos cerámicos con aplicación a materiales fotovoltaicos híbridos

Tolosa¹,

Dolores²

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AGRADECIMIENTOSVaya, llegó el momento de escribir agradecimientos en mi tesis doctoral. Eso significa que cierro una vez más una etapa de mi vida, y que como cada una de ellas, la he vivido al máximo, disfrutando y sintiendo cada momento. Gracias a la gente que me ha acompañado.La realización de una tesis doctoral es un camino largo, costoso, incluso podría definirse como una montaña rusa, llena de altibajos. Por eso es muy importante tener a alguien al lado, en el ámbito profesional, que te escuche, te ayude y sobretodo que te valore. Si además esa persona es tu director de tesis, mucho mejor. Gracias Javier por haber confiado en mí, por valorar cada idea que proponía, por hacerme sentir profesional y por brindarme las múltiples oportunidades profesionales que desde tu modesta posición podías ofrecerme. Esta etapa se acaba, y aunque profesionalmente no sabemos lo que nos depara el futuro espero que sepas que aquí tienes una amiga.El trabajo diario se realiza con mucha otra gente, con la que acabas compartiendo infinidad de momentos, primero laborales y , con el tiempo y sin darte cuenta, personales. Quería agradecer a María Ángeles, todo su apoyo y ayuda, pues aun no siendo directora de mi tesis, la he tenido ahí como si lo fuese. Sin darnos cuenta nos hemos convertido en compañeras y amigas, y eso es lo que me llevo.A Laura, codirectora de mi tesis, con su acento Argentino y su predisposición a trabajar cada vez que venía, me alegraba la mañana en el laboratorio. Una gran profesional y una maravillosa persona.A todos mis compañeros de laboratorio y departamento, en especial a aquellos que se han convertido en mis amigos: Motaz, Inma, Fidel y Mari Carmen. Saber que cada día iba a pasar un rato con vosotros, ha hecho que ir a trabajar deje, sin duda alguna, de ser un esfuerzo. Gracias por aguantar mis momentos de bajón y mis momentos llorones, como dice Inma, y también por alegraros conmigo de cada una de las cosas buenas que me han pasado en este periodo.Agradecer también a todas esas personas que he conocido realizando mi tesis: Gracias por acompañarme en algún momento de este periodo que ahora acaba. Seguro que con muchos de vosotros compartiré tiempo en mi nueva etapa: Henk, Alejandra, Ana, Álvaro, Rubens, Leticia, Merche, Manolo, Compañeros de viaje en Tallahassee, Siliken I+D … Y como no, aunque la tesis doctoral es de ámbito profesional, saber que tu familia está orgullosa de ti, hace que sigas adelante. Gracias mamá por apoyarme siempre, por pensar que soy la "más lista" como siempre dices. Sé que he tenido tu apoyo incondicional en cada minuto. Gracias papá por cada uno de tus consejos dejando que fuese yo misma la que tomase las decisiones, y por sentirte tan orgulloso de mí. Gracias yayos, por preguntarme cada día como iba la "tesis esa" y "que eso que hacía para qué era", sé que estáis orgullosos de mí, y para mí eso vale muchísimo. Os quiero. A toda mi familia, GRACIAS de corazón.A mis amigos, a esos amigos de verdad con los que tantas y tantas veces me he desahogado, reído y nunca me han fallado, M...

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Optical properties of SrTiO 3 thin films by pulsed laser deposition

Cited by 67 publications

References 0 publications

Optical and mechanical properties of transparent SrTiO₃ thin films deposited by ECR ion beam sputter deposition

Optical and mechanical properties of transparent SrTiO₃ thin films deposited by ECR ion beam sputter deposition

Photocatalytic TiO2 Nanorod Spheres and Arrays Compatible with Flexible Applications

Modelo de nucleación y crecimiento de capas nanoestructuradas de óxido de zinc sobre sustratos cerámicos con aplicación a materiales fotovoltaicos híbridos

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Optical properties of SrTiO 3 thin films by pulsed laser deposition

Cited by 67 publications

References 0 publications

Optical and mechanical properties of transparent SrTiO3 thin films deposited by ECR ion beam sputter deposition

Optical and mechanical properties of transparent SrTiO3 thin films deposited by ECR ion beam sputter deposition

Photocatalytic TiO2 Nanorod Spheres and Arrays Compatible with Flexible Applications

Modelo de nucleación y crecimiento de capas nanoestructuradas de óxido de zinc sobre sustratos cerámicos con aplicación a materiales fotovoltaicos híbridos

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Optical and mechanical properties of transparent SrTiO₃ thin films deposited by ECR ion beam sputter deposition

Optical and mechanical properties of transparent SrTiO₃ thin films deposited by ECR ion beam sputter deposition