ivo1rrProf. Ivo A. Hümmelgen     Lattes curriculum vitae , Research ID

Departamento de Física
Universidade Federal do Paraná
Caixa Postal 19044
81531-980 - Curitiba PR,  Brazil

E-mail: iah@fisica.ufpr.br

Phone/Fax: ++55 - 41 - 33613645


BSc: Federal University of Paraná, Brazil, 1985
MSc: University of São Paulo - São Carlos, Brazil, 1987 
DSc: University of Göttingen, Germany, 1991 





Hybrid and all-organic transistors (FETs, V-FETs, vertical structures).

Sensors (chemical sensors for agriculture, pressure sensors, humidity sensors).

Hybrid and organic photovoltaic devices.

Charge carrier injection  and transport in conjugated molecule, polymers and blends.

Organic memories.

Magnetic field effects in organic semiconductors.



            Post-Doctoral collaborators

            Dr. Isidro Cruz-Cruz

            Dr. Marcia de W. C. C. Greenshields

            PhD Students:

                        Ali Nawaz

                        Ana Carolina B. Tavares

                        Anderson Hoff                    

            Diana Jastrombek

            Elton Alves de Moura

            Nagaraj Krishna Subbaiah

            Nouman Ali 

            Rafael Rodrigues                                                                                                            

            MSc Students

                        Jonas Kublitski




OPPORTUNITIES: Fellowship opportunities for MSc/PhD/Post-doctoral studies in Brazil


Brazilian PEC-PG program: for students with Portuguese language knowledge


TWAS/CNPq Fellowships for PhD/Post-doctoral studies in Brazil


Fellowships of the OAS - Organization of the American States


"Science withouth Borders" program


CNPq regular post-doctoral fellowships




Poly(3-hexylthiophene-2,5-diyl) Based Field Effect Transistors Performance Enhancement through Surfactant Treatment of the Poly(vinyl alcohol) Gat e Insulator Surface.

Physical Chemistry Chemical Physics, v. 17, p. 26530-26534, 2015.


Poly(vinyl alcohol) gate dielectric surface treatments with vitamin C for poly(3-hexylthiophene-2,5-diyl) based field effect transistors performance improvement.

Organic Electronics, v. 17, p. 22-27, 2015.


Non-destructive tomato ripeness determination using carbon nanostructure based chemical sensors.

Application of tristimulus and principal component analysis methods. International Journal of Electroactive Materials, v. 3, p. 10-14, 2015.


A surfactant dispersed N-doped carbon sphere-poly(vinyl alcohol) composite as relative humidity sensor.

Journal of Materials Science. Materials in Electronics, v. 26, p. 4198-4201, 2015.


An additional tool towards overcoming absence of specificity of carbon nanostructure-based electrochemical sensors application to estriol and estradiol detection and distinction.

Journal of Solid State Electrochemistry, v. 19, p. 3045, 2015.


Modification of the charge transport properties of the copper phthalocyanine/poly(vinyl alcohol) interface using cationic or anionic surfactant for field-effect transistor performance enhancement.

Journal of Physics. D, Applied Physics, v. 48, p. 335104, 2015.


Copper phthalocyanine based vertical organic field effect transistor with naturally patterned tin intermediate grid electrode

Organic Electronics, v. 27, p. 155-159, 2015.


Improved charge carrier mobility in copper phthalocyanine based field effect transistors by insertion of a thin poorly conducting layer as gate insulator extension.

Physica Status Solidi. A, Applications and Materials Science, v. 212, p. 2759-2765, 2015.




Carbon nanostructures in organic WORM memories.

Journal of Materials Chemistry C v. 2, p. 7708, 2014.


SeP hole injection layer for devices based on organic materials.

Journal of Physics. D, Applied Physics  v. 47, p. 015304, 2014.


Structural and Optical properties of ZnO films produced by a Modified Ultrasonic Spray Pyrolysis Technique.

Thin Solid Films, v. 555, p. 13-18, 2014.


Interfacial insertion of a poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) layer between the poly(3-hexyl thiophene) semiconductor and cross-linked poly(vinyl alcohol) insulator layer in organic field-effect transistors.

Journal of Physics. D, Applied Physics, v. 47, p. 075102, 2014.


Hydrostatic pressure sensors based on carbon spheres dispersed in polyvinyl alcohol prepared using hexadecyltrimethylammonium bromide as surfactant and water as solvent.

Materials Research Express, v. 1, p. 015605, 2014.


All-organic vertical transistor in an analogous n-semiconductor/metal/p-semiconductor trilayer structure.

Organic Electronics, v. 15, p. 738, 2014.                                                                                                                 


Tristimulus mathematical treatment application for monitoring fungi infestation evolution in melon using the electrical response of carbon nanostructure-polymer composite based sensors.

Sensors and Actuators. B, Chemical, v. 188C, p. 378-384, 2013.


GaN nanostructures-poly(vinyl alcohol) composite based hydrostatic pressure sensor device.

Materials Chemistry and Physics, v. 143, p. 367-372, 2013.


Undoped, nitrogen-doped and boron-doped multiwalled carbon nanotube/poly(vinyl alcohol) composite as active layer in simple hydrostatic pressure sensors.

Journal of Materials Science. Materials in Electronics, v. 24, p. 3995-4000, 2013.


Performance of hybrid -type vertical transistors with poly(vinylcarbazole) as emitter and the transfer mechanism of charge carriers through the base.

Semiconductor Science and Technology, v. 28, p. 115001, 2013.


Determination of electron and hole mobility in poly(3-hexylthiophene)  using space-charge-limited-current measurements,

International Journal of Electroactive Materials, v. 1, p. 60-63, 2013.


Study of poly (3-hexylthiophene)/cross-linked poly (vinyl alcohol) as semiconductor/insulator for application in low voltage organic field effect transistors,

Journal of Applied Physics 113, 214509

Functionalized Spherical Carbon Nanostructure/Poly (vinylphenol) Composites for Application in Low Power Consumption Write-Once-Read-Many Times Memories,

Journal of Nanoscience and Nanotechnology 13 (8), 5680-5686

Polymer composite of poly(vinyl phenol)-reduced graphene oxide reduced by vitamin C in low energy consuming write-once read-many times memory devices,

Organic Electronics, v. 14, p. 175-181, 2013.

Vertical organic field effect transistor using sulfonated polyaniline/aluminum bilayer as intermediate electrode,

Journal of Materials Science: Materials in Electronics 24 (3), 1052-1056

Nitrogen-doped, boron-doped and undoped multiwalled carbon nanotube/polymer composites in WORM memory devices,

Nanotechnology 24 (12), 125203

Polarized vibrational spectra of Prussian Blue films: Spectroscopic evidence of columnar growth. Vibrational Spectroscopy,

Vibrational Spectroscopy (Print), v. 64, p. 58, 2013.

Undoped, nitrogen-doped and boron-doped multiwalled carbon nanotube/poly(vinyl alcohol) composite as active layer in simple hydrostatic pressure sensors,

Materials in Electronics, v. 13, p. 5680-5686, 2013.


Low voltage organic field effect transistors with a poly (hexylthiophene)–ZnO nanoparticles composite as channel material, WS Machado, IA Hümmelgen, physica status solidi (RRL)-Rapid Research Letters 6 (2), 74-76.

The OFF to ON switching time and ON state consolidation in write-once-read-many-times memory devices based on doped and undoped carbon-sphere/polymer composites, WS Machado, MA Mamo, NJ Coville, IA Hümmelgen, Thin Solid Films 520 (13), 4427-4431.  

Changing inter-molecular spin-orbital coupling for generating magnetic field effects in phosphorescent organic semiconductors, Yan, L. ; Shao, M. ; Graeff, C. F. O. ; Hummelgen, I. ; MA, D. ; Hu, B., Applied Physics Letters, v. 100, p. 013301, 2012.

A comparative study on hydrostatic pressure response of sensors based on N-doped, B-doped and undoped carbon-sphere poly (vinyl alcohol) composites, MA Mamo, WS Machado, NJ Coville, IA Hümmelgen, Journal of Materials Science: Materials in Electronics 23 (7), 1332-1337.  

Organic low voltage rewritable memory device based on PEDOT: PSS/f-MWCNTs thin film, JA Ávila Niño, WS Machado, AO Sustaita, E Segura-Cardenas, M Reyes-Reyes, R. Lopez-Sandoval, I. A. Hümmelgen, Organic Electronics v. 13, p. 2582-2588, 2012.

Investigation of deep-level defects in conductive polymer on n-type 4H- and 6H-silicon carbide substrates using I-V and deep level transient spectroscopy techniques, J. F. Fekix ; M. Aziz ; Seidel, K. F. ; Hümmelgen, I. A. ; E. F. da Silva Jr ; M. Henini . Journal of Applied Physics, v. 112, p. 014505, 2012.

Low-Voltage Poly(3-Hexylthiophene)/Poly(Vinyl Alcohol) Field-Effect Transistor and Inverter, Machado, W. S. ; I. A. Hümmelgen, I.E.E.E. Transactions on Electron Devices, v. 59, p. 1529-1533, 2012.

Electronic Detection of Drechslera sp Fungi in Charentais Melon (Cucumis melo Naudin) Using Carbon-Nanostructure-Based Sensors. M. W. C. C. Greenshields ; Mamo, M. A. ; N. J. Coville ; Spina, A. P. ; Rosso, D. F. ; Latocheski, E. C. ; Destro, J. G. ; Pimentel, I. C. ; Hümmelgen, I. A., Journal of Agricultural and Food Chemistry, v. 60, p. 10420-10425, 2012.

Hybrid vertical transistor based on controlled lateral channel overflow, Ahmed, M. F. ; Seidel, K. F. ; Marchiori, C. F. N. ; Mello, R. M. Q. .; Koehler, M. ; Hummelgen, I. A. . Journal of Applied Physics, v. 112, p. 074509, 2012.


AC-Conductance and Capacitance Measurements for Ethanol Vapor Detection Using Carbon Nanotube-PVA Composite Based Devices, M. W. C. C. Greenshields, Michelle S. Meruvia, I. A. Hümmelgen, N. J. Coville, S. D. Mhlanga, H. J. Ceraglioli, J. C. R. Quispe, V. Baranauskas, Journal of Nanoscience and Nanotechnology 11 (2011) 2384.


Low voltage vertical organic field-effect transistor with polyvinyl alcohol as gate insulator. Rossi, L. ; Seidel, K. F. ; Machado, W. S. ; Hümmelgen, I. A. . Journal of Applied Physics, v. 110, p. 094508, 2011.


Composites of Polyvinyl Alcohol and Carbon (Coils, Undoped and Nitrogen Doped Multiwalled Carbon Nanotubes) as Ethanol, Methanol and Toluene Vapor Sensors. Greenshields, Márcia W. C. C. ; Hümmelgen, Ivo A. ; Mamo, Messai A. ; Shaikjee, Ahmed ; Mhlanga, Sabelo D. ; van Otterlo, Willem A. L. ; Coville, Neil J. . Journal of Nanoscience and Nanotechnology (Print), v. 11, p. 10211-10218, 2011.


Hybrid Vertical Architecture Transistor with 2,6-Diphenylindenofluorene Based Emitter and Base Permeability Controlled by Polystyrene Spheres Lithography. L. Rossi, J. P. M.  Serbena, M. S. Meruvia, I. A. Hümmelgen, E. M. Stori, C. K. Saul,Z. Y. Wang, Journal of Nanoscience and Nanotechnology 10 (2010) 2389.


Electrical and optical properties of poly(2-dodecanoylsulfanyl-p-phenylenevnylene) and its application in electroluminescent devices. F. M. Nodari, R. L. Patyk, L. S. Roman, A. R. V. Benvenho, I. A. Hümmelgen, E. K. C. Yoshikawa, J. Gruber, Journal of Materials Science. Materials in Electronics 21 (2010) 1235.


Hydrostatic pressure sensor based on carbon sphere polyvinyl alcohol composites, W. S. Machado, P. L. Athayde, M. A. Mamo, W. A. L. van Otterlo, N. J. Coville, I. A. Hümmelgen, Organic Electronics 11 (2010) 1736.


Simple write-once-read-many-times memory device based on a carbon sphere-poly(vinylphenol) composite. M. A. Mamo, W. S. Machado, W. A. L. van Otterlo, N. J. Coville, I. A. Hümmelgen, Organic Electronics 11 (2010) 1858.




Last updated: January 12, 2015