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Prof. Ivo A. Hümmelgen E-mail: iah@fisica.ufpr.br Phone/Fax:
++55 - 41 - 33613645 Education:
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RESEARCH INTERESTS: |
Charge
carrier injection and transport in
conjugated polymers and blends.
Magnetic
field effects in organic semiconductors, Transistors with magnetic field
dependent gain.
Hybrid
and all-organic vertical architecture transistors
Organic
memories and oscillators.
Hybrid
and Organic photovoltaic devices.
Sensors
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THE GROUP
Post-Doctoral collaborators
Dr.
Michelle S. Meruvia
Graduate Students:
Abd
Rashid Bin Mohd Yusoff Keli F. Seidel Lucieli
Rossi
Marcia de
Windson C. C. Greenshields Mohammed
Fareed Ahmed Patrick Landal
Athayde
Wagner
Souza Machado
FINANCIAL SUPPORT: CAPES, CNPq, CT-ENERG, CT-INFRA, FINEP, Fundação
Araucária, IM2C, PADCT, PRONEX, Renami, Royal Society.
OPPORTUNITIES: Fellowship opportunities for MSc/PhD/Post-doctoral
studies in Brazil
Brazilian PEC-PG program: for students with Portuguese language proficiency: http://www.capes.gov.br/cooperacao-internacional/multinacional/pec-pg or
http://www.dce.mre.gov.br/..%5CPEC-PG%5C1_PECPG.htm
TWAS/CNPq Fellowships for PhD/Post-doctoral studies in Brazil: PhD: http://twas.ictp.it/prog/exchange/fellowships-pg/bra-pg
Post-doctoral: http://twas.ictp.it/prog/exchange/fellowships-pdoc/bra-pdoc
Fellowships of the OAS - Organization of the American States: http://www.educoas.org/portal/en/oasbecas/types.aspx?culture=en&navid=44
RECENT PUBLICATIONS
2009
Hybrid vertical architecture transistor with magnetic-field-dependent
current amplification as organic magnetocurrent investigation tool, A. R. B. M. Yusoff
and I. A. Hümmelgen, Journal of Applied Physics 106 (2009) 074505.
Very high magnetocurrent in tris-(8-hydroxyquinoline)
aluminum-based bipolar charge injection devices, A. R. B. M. Yusoff, W. J. da
Silva, J. P. M. Serbena, M. S. Meruvia and I. A. Hümmelgen, Applied Physics
Letters 94 (2009) 253305.
Vertical structure permeable-base hybrid transistor
based on multilayered metal base for stable electrical characteristics, J. P. M. Serbena,
J. Y. Huang, D. Ma, Z. Y. Wang and I. A. Hümmelgen, Organic Electronics 10
(2009) 357
Ambipolar permeable metal-base transistor based on
NPB/C60 heterojunction, J. Huang, M. Yi, I. A.
Hümmelgen and D. Ma, Organic Electronics 10 (2009) 210.
Sulfonated polyaniline/n-type silicon junctions. Silva, W. J.;
Hümmelgen, I. A. ; Mello, R. M. Q. , Journal of Materials Science. Materials in
Electronics, 20 (2009) 123.
2008
Vertical structure p-type permeable metal-base organic
transistors based on
N,N'-diphentyl-N,N'-bis(1-naphthylphenyl)-1,1'-biphenyl-4,4'-diamine. Applied Physics
Letters, v. 92 (2008) 232111.
High gain in hybrid transistors with BAlq3/Alq3
isotype heterostructure emitter. M. Yi, J. Huang, D. Ma, I. A. Hümmelgen,
Applied Physics Letters 92 (2008) 243312.
Hybrid metal-base transistor with base of sulfonated
polyaniline and fullerene emitter. W. J. da Silva, I. A. Hümmelgen, R. M. Q.
Mello, D. Ma, Applied Physics Letters, 93 (2008) 053301.
Hybrid permeable metal-base transistor with large
common-emitter current gain and low operational voltage. Hümmelgen, I. A. ;
Feng, C. ; Yi, M. ; Yu, S. ; Zhang, T. ; Ma, D. , Journal of Nanoscience and
Nanotechnology, 8 (2008) 2037.
Large current gain and low operational voltage
permeable metal-base organic transistors based on Au/Al double layer metal base. Yi, M. ; J.
Huang ; Ma, D. ; Hümmelgen, I. A., Organic Electronics, 9 (2008) 539.
2007
Polymer
Solar Cells Using Single-Wall Carbon Nanotubes Modified with Thiophene Pedant Groups. Hümmelgen, I. A.
; Nogueira, A. F. ; Lomba, B. S ; Soto-Oviedo ,M. A. ; Correia ,C. R. D. ;
Corio, P. ; Furtado, C. A ., Journal of Physical Chemistry C 111(2007)18431.
Magnetic
field release of trapped charges in poly(fluorenylenevinylene)s, Hümmelgen, I. A.
; Meruvia, M. S. ; Freire, J. A. O.; Gruber, J. ; Graeff, C. F. O., Organic
Electronics 8 (2007) 695.
Synthesis, morphology and device characterizations of a new organic
semiconductor based on 2,6-diphenylindenofluorene, T. Hadizad, J. Zhang, D. Yan,
Z. Y. Wang, J. P. M. Serbena, M. S. Meruvia, I. A. Hummelgen, J. Mater. Sci.:
Mater. Electron. 18 (2007) 903.
Ferrocene-based
copolymer for the sensing and discrimination of low-molecular-weight alcohols. Hümmelgen, I. A.
; Meruvia, M. S. ; Goncalves, C. S. ; Benvenho, A. R. V. ; Gruber, J. , Sensor
Letters 5 (2007) 625.
High
gain in hybrid transistors with vanadium oxide/tris(8-hydroxyquinoline)
aluminium emitter, M. Yi, S. Yu, C. Feng, T. Zhang, D. Ma, M. S.
Meruvia, I. A. Hümmelgen, Organic Electronics Organic Electronics 8 (2007) 311.
High
open-circuit voltage single-layer polybithiophene-based photovoltaic devices. Leguenza, E. L ;
Patyk, R. L.; Mello, R. M. Q.; Micaroni, L.; Koehler, M.; Hümmelgen, I. A.,
Journal of Solid State Electrochemistry 11 (2007) 580.
Carbon nanotube-polybithiophene photovoltaic devices with high open-circuit voltage, R. L. Patyk, B. S. Lomba, A. F. Nogueira, C. A. Furtado, A. P. Santos, R. M. Q. Mello, L. Micaroni, I. A. Hümmelgen, Phys. Stat. Sol. (RRL) 1, R43-R45 (2007).
2006
Sulfonated
polyaniline/poly(3-methylthiophene)-based photovoltaic devices, R. Valsaki, F.
Muchenski, R. M. Q. Mello, L. Micaroni, L. S. Roman, I. A. Hümmelgen, J. Solid
State Electrochemistry, 10(2006) 24.
Hybrid molecular/inorganic semiconductor transistors in vertical
architecture, M. S. Meruvia, I. A. Hümmelgen, Advanced Functional Materials 16 (2006)
459.
Electrodeposited p-type magnetic Metal Base Ttransistor, R. G. Delatorre,
M. L. Munford, V. Stenger, A. A. Pasa, W. Schwarzacher, M. S. Meruvia, I. A.
Hummelgen, J. Appl. Phys. 99, 8H704 (2006).
Hybrid Permeable-Base Transistors Based on an Indenofluorene Derivative, J. P. M.
Serbena, I. A. Hummelgen, T. Hadizad, Z. Y. Wang,. Small 2 (2006) 372.
High current density Tris(8-hydroxyquinoline) aluminum-based hybrid
transistor in vertical architecture, M. Yi, S. Yu, D. Ma, C.
Feng, T. Zhang, M. S. Meruvia, I. A. Hummelgen,. J. Appl. Phys. 99, 106102
(2006).
p-Type Metal-Base Transistor, R. G. Delatorre, M. L.
Munford, R. Zandonay, V. C. Zoldan, A. A. Pasa, W. Schwarzacher, M. S. Meruvia,
I. A. Hummelgen, Appl. Phys. Lett. 88, 233504 (2006).
Operation of metallic base transistors with fullerene emitter, L. Rossi, M. S.
Meruvia, I. A. Hummelgen, W. Schwarzacher, A. A. Pasa, J. Appl. Phys. 2006, in
press.
Copper phthalocyanine based hybrid p-type permeable-base transistor in
vertical architecture, C. Feng, M. Yi, S. Yu, D. Ma, T. Zhang, M. S.
Meruvia, I. A. Hummelgen,. Appl. Phys. Lett. 88, 203501 (2006).
Polymeric Electronic Oscillators Based on Bistable Conductance Devices, J. A. O. Freire,
G. D. Moro, R. Toniolo, I. A. Hummelgen, C. A. Ferreira, Organic Electronics,
2006, in press.
Physical and chemical characterization of poly(2-bromo-5-hexyloxy-p-phenylenevinylene)
and poly(5,5'-dibromo-2,2'-bis-hexyloxy-4,4'-biphenylenevinylene) - comparison
to related polymers, A. R. V. Benvenho, R. Lessmann, I. A. Hümmelgen, R.
M. Q. Mello, R. W. C. Li, F. Bazito, J. Gruber, Materials Chemistry and
Physics, 95 (2006) 176.
Magnetoresistive hybrid transistor in vertical architecture, M. S. Meruvia A.
R. V. Benvenho, I. A. Hümmelgen, J. A. Gomez, C. F. O. Graeff, R. W. C. Li; L.
H. J. M. C. Aguiar, J. Gruber, Physica Status Solidi A-Applied Research, 202
(2005) R158.
Hybrid magnetic transistor, M. S. Meruvia, A. R. V. Benvenho, I. A.
Hummelgen, R. W. C. Li, L. H. J. M. C. Aguiar, J. Gruber, Solid State Commun. 139, 27 (2006).
2005
Magnetoresistive hybrid transistor in vertical architecture, M. S. Meruvia, I.
A. Hümmelgen J. A. Gomez, C. F. O Graeff, R. W. C. Li, L. H. J. M. C. Aguiar,
J. Gruber, physica status solidi (a) 202, R158 (2005).
Pseudo-metal-base transistor with high gain, M. S. Meruvia, A. R. V.
Benvenho, I. A. Hümmelgen, A. A. Pasa, W. Schwarzacher, Applied Physics letters
86, 263504 (2005).
Electrical optimization of single-layer light-emitting diodes based on
binary organic semiconductor blends, A. Gusso, I. A. Hümmelgen,
M. G. E. da Luz, Journal of Physics - D (Applied Physics), 38, 260 (2005).
A novel soluble poly(fluorenylenevinylene) conjugated polymer:
synthesis, characterization and application to optoelectronic devices, J. Gruber, R. W.
C. Li, L. H. J. M. C. Aguiar, A. R. V. Benvenho, R. Lessmann, I. A. Hümmelgen,
Journal of Materials Chemistry, 15, 517 (2005).
2004
Electrochemically synthesized sulfonated polyaniline layer for positive
charge carrier injection improvement in conjugated polymer devices, L. S. Roman, R.
M. Q. Mello, F. Cunha, I. A. Hümmelgen, Journal Of Solid State
Electrochemistry, v. 8, p. 118-121, 2004.
Organic Electronic Pulse Generator, R. Toniolo, C. M.
Lepienski, I. A. Hümmelgen Electronics Letters, v. 40, n. 9, p. 566-567, 2004.
Organic-metal-semiconductor transistor with high gain, M. S. Meruvia,
I. A. Hümmelgen, M. L. Sartorelli, A. A. Pasa, W. Schawarzacher, Applied
Physics Letters, v. 84, n. 20, p. 3978-3980, 2004.
Photovoltaics based on thin electrodeposited bilayers of
poly(3-methylthiophene) and polypyrrole, I. A. Hümmelgen, R.
Valaski, L. S. Roman, L. Micaroni, E. C. Rios, R. M. Q. Mello, Physica Status
Solidi A-Applied Research, Alemanha, v. 201, n. 5, p. 842-849, 2004.
Poly(3-methylthiophene)-based photovoltaic devices prepared onto
tin-oxide/sulfonated-polyaniline electrodes, R. Valaski, R. Lessmann, L.
S. Roman, I. A. Hümmelgen, R. M. Q. Mello, L. Micaroni, Electrochemistry
Communications, Holanda, v. 6, p. 357-360, 2004.
Simple and fast organic device encapsulation using polyisobutene, R. Toniolo, I.
A. Hümmelgen, Macromeolecular Materials And Engineering, v. 289, n. 4, p.
311-314, 2004.
Surface roughness of electropolymerized polyaniline and
sulfonatedpolyaniline layers, L. F. O. Martins, R. M. Q. Mello, M. L.
Sartorelli, I. A. Hümmelgen, A. A. Pasa, Physica Status Solidi A-Applied
Research, Alemanha, v. 201, n. 5, p. 902-907, 2004.
Thin copolymer-based light-emitting display made with fluorine-doped tin
oxide substrates, R. Lessmann, I. A. Hümmelgen, Materials Research, v.
7, n. 13, p. 467-471, 2004.
Last updated: September 2, 2009