University Research Fellow, Materials Research Laboratory
Docent, Department of Physics and Astronomy


Areas of expertise

surface science
semiconductors, surface passivation, film growth


Pekka Laukkanen obtained his MSc degree in 2000 at Tampere University of Technology in the field of optoelectronics. He completed his PhD thesis in 2005 in the area of surface physics at University of Turku. He is now working at interface between surface science and semiconductor technology, trying to improve interconnection and collaboration between these fields. His expertise area includes photoelectron spectroscopy, scanning tunneling microscopy, electron diffraction, surface passivation, interface defects, and semiconductor technology. Laukkanen has published 130 refereed articles, four book chapters, and three patents.


Recently I have teched the following courses at the University of Turku:

- Phases and properties of materials (Aineen olomuodot ja ominaisuudet)

- Electrical properties of solids (Kiinteän aineen sähköiset ominaisuudet)

- Semiconductors (Puolijohteet)

- Semiconductor spectroscopy (method course)


We have investigated surface properties: chemical, electronic, and structural ones of semiconductor crystals including silicon (Si), germanium (Ge), and III-V compound semiconductors (e.g. GaAs, GaN, InAs, InP) by means of electron diffraction (LEED, RHEED), scanning tunneling microscopy and spectroscopy (STM/STS), and photoelectron spectroscopy (including synchrotron sources). One goal has been to develop the connection or collaboration between the surface science and the semiconductor technology disciplines. More recently we have focused on the question how to decrease surface-related electrical losses and malfunctions in various semiconductor-based devices like capacitors, sensors, solar cells, and transistors. We have tried to understand reasons for formation of defect levels in device surfaces and to find controlled methods to decrease the amount of defect levels. 


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Bridging the gap between surface physics and photonics (2024)

Reports on Progress in Physics
Laukkanen Pekka, Punkkinen Marko, Kuzmin Mikhail, Kokko Kalevi, Liu Xiaolong, Radfar Behrad, Vähanissi Ville, Savin Hele, Tukiainen Antti, Hakkarainen Teemu, Viheriälä Jukka, Guina Mircea
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))

Properties and modification of native oxides of InP(100) (2023)

Journal of Physics D: Applied Physics
Ebrahimzadeh Masoud, Vuori Sami, Miettinen Mikko, Lehtiö Juha-Pekka, Granroth Sari, Punkkinen Marko P. J., Jahanshah Rad Zahra Sadat, Punkkinen Risto, Kuzmin Mikhail, Laukkanen Pekka, Lastusaari Mika, Kokko Kalevi
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))