Search Results - "Hümmelgen, I.A"

Influence of film thickness on charge transport of electrodeposited polypyrrole thin films by Valaski, R, Ayoub, S, Micaroni, L, Hümmelgen, I.A

“…We report the investigation of charge transport properties of thin electrodeposited polypyrrole (PPy) films. The charge transport in these films is limited by…”
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The use of tin oxide thin films as a transparent electrode in PPV based light-emitting diodes by Arias, A.C, Roman, L.S, Kugler, T, Toniolo, R, Meruvia, M.S, Hümmelgen, I.A

“…Tin oxide (TO) thin films, nominally undoped, have been used as electrodes in poly( p-phenylene vinylene) (PPV) based organic electroluminescent devices. The…”
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Physical and tribological properties of hard amorphous DLC films deposited on different substrates by Poliakov, V.P, Siqueira, C.J.de M, Veiga, W, Hümmelgen, I.A, Lepienski, C.M, Kirpilenko, G.G, Dechandt, S.T

“…Hard amorphous DLC films were deposited onto ultra high molecular weight polyethylene (UHMWPE) and metallic substrates (Ti, Co–Cr–Mo, stainless steel 138F)…”
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Positive charge transport in an alternating oligo-p-phenylenevinylene-derivative/aliphatic-segment block copolymer by Benvenho, A.R.V., Hümmelgen, I.A.

“…An effective positive charge carrier mobility of 4.4 x 10 -9 cm²/V.s was directly determined using analytical expressions for space-charge-limited current in…”
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EXAFS investigations on amorphous GaSe9 thin films by Siqueira, M.C., Machado, K.D., Maia, R.N.A., Araujo, R.M.T., Serbena, J.P.M., Hümmelgen, I.A., Stolf, S.F.

“…The structural properties of amorphous GaSe9 thin films produced by vacuum evaporation were investigated using the EXAFS technique and the cumulant expansion…”
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Structural and optical properties of ZnO films produced by a modified ultrasonic spray pyrolysis technique by Silva, T.G., Silveira, E., Ribeiro, E., Machado, K.D., Mattoso, N., Hümmelgen, I.A.

“…In this work we present a modification of the usual ultrasonic spray pyrolysis method and tested its ability to produce good quality films by producing ZnO…”
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Naphthalimide-derivative with blue electroluminescence for OLED applications by Triboni, E.R., Fernandes, M.R., Garcia, J.R., Carreira, M. Costa, Berlinck, R.G.S., Filho, P. Berci, Roman, L.S., Hümmelgen, I.A., Reyes, R., Cremona, M.

“…The synthesis and characterization of the 4-(2-fenoxi-p-xileno)-N-methyl-1,8-naphthalimide, referred to here as NPOX, is described in this work. The…”
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Vertical structure permeable-base hybrid transistors based on multilayered metal base for stable electrical characteristics by Serbena, J.P.M., Huang, J.Y., Ma, D., Wang, Z.Y., Hümmelgen, I.A.

“…In this work we present a permeable-base transistor consisting of a 60 nm thick N, N′-diphenyl- N, N′-bis(1-naphthylphenyl)-1,1′-biphenyl-4,4′-diamine layer or…”
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The influence of electrode material on charge transport properties of polypyrrole thin films by Valaski, R., Ayoub, S., Micaroni, L., Hümmelgen, I.A.

“…We investigated electrodeposited polypyrrole (PPy) thin films. Tin-oxide (TO) and Au were used as deposition substrate and it was found that film morphology…”
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Interchain luminescence in poly(acetoxy-p-phenylene vinylene) by Aguiar, M., Fugihara, M.C., Hümmelgen, I.A., Péres, L.O., Garcia, J.R., Gruber, J., Akcelrud, L.

“…The synthesis of a new substituted poly(phenylene vinylene) (PPV) derivative poly(acetoxy-p-phenylene vinylene) is reported. A new pathway, combining chemical…”
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Synthesis and characterization of poly(decyloxy-p-phenylenevinylene) by Yoshikawa, E.K.C., Roman, L.S., Hümmelgen, I.A., Gruber, J.

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Photovoltaic devices based on electrodeposited poly(3-methylthiophene) with tin oxide as the transparent electrode by Valaski, R., Silveira, E., Micaroni, L., Hümmelgen, I.A.

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Preparation and characterization of transparent conducting tin oxide thin film electrodes by chemical vapour deposition from reactive thermal evaporation of SnCl2 by YADAVA, Y. P, DENICOLO, G, ARIAS, A. C, ROMAN, L. S, HÜMMELGEN, I. A

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Naphthalene Containing Poly(urethane-urea) for Volatile Memory Device Applications by Mello, Regina M. Q., Azevedo, Elaine C., Meneguzzi, Álvaro, Aguiar, Marcelo, Akcelrud, Leni, Hümmelgen, Ivo A.

“…Current or voltage controlled electrical switching in organic molecules and polymers is attracting attention due to its potential in organic electronic memory…”
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Preparation and characterization of transparent conducting tin oxide thin film electrodes by chemical vapour deposition from reactive thermal evaporation of SnCl 2 by Yadava, Y.P, Denicoló, G, Arias, A.C, Roman, L.S, Hümmelgen, I.A

“…A chemical vapour deposition technique has been developed for highly transparent conducting tin oxide thin films from the reactive thermal evaporation of SnCl…”
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Determination of electron mobility in a blue-emitting alternating block copolymer by space-charge-limited current measurements by Ma, D., Hümmelgen, I.A., Hu, B., Karasz, F.E., Jing, X., Wang, L., Wang, F.

“…In this communication we analyse current versus voltage data obtained using one carrier injection at metal/polymer/metal structures. The used polymer is a…”
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A poly(acetoxy- p-phenylene vinylene) based diode with a soft breakdown behaviour by de Lima, J.R, Péres, L.O, Garcia, J.R, Gruber, J, Hümmelgen, I.A

“…We present an organic device with an abrupt increase in the current when the applied voltage exceeds a critical value, behaving like a switch. The device…”
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Negative Charge Carrier Transport in Poly(methylmethacrylate-co-9-anthracenyl-methylmethacrylate) Thin Films by Ma, Dongge, Aguiar, M., Hümmelgen, I.A.

“…We have investigated the current–voltage characteristics of devices made of poly(methylmethacrylate‐co‐9‐anthracenyl‐methylmethacrylate) (10 : 1) sandwiched…”
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Electronic properties of poly(1,4-phenylene methylidynenitrilo-1,4-phenylene nitrilomethylidyne) (PPI) by Nart, F.C., Péres, L.O., de Sá, E.L., Roman, L.S., Hümmelgen, I.A., Gruber, J., Li, R.W.C.

“…Poly(1,4-phenylene methylidynenitrilo-1,4-phenylene nitrilomethylidyne) (PPI) was prepared and investigated using UV spectroscopy and tunneling current…”
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