Jožef Stefan Institute


The Jožef Stefan Institute (IJS) (Slovene: Institut “Jožef Stefan”) is the largest research institute in Slovenia. The main research areas are physics, chemistry, molecular biology, biotechnology, information technologies, reactor physics, energy and environment. At the beginning of the 2013 the institute had 962 employees, 404 of them were Ph.D scientists.

The mission of the Jožef Stefan Institute is the accumulation and dissemination of knowledge at the frontiers of natural science and technology to the benefit of society at large through the pursuit of education, learning, research, and development of high technology at the highest international levels of excellence.


The institute was founded by the State Security Administration (Yugoslavia) in 1949 for atomic weapons research. Initially, the Vinča Nuclear Institute in Belgrade was established in 1948, followed by Ruđer Bošković Institute in Zagreb in 1950 and the Jožef Stefan Institute as an Institute for Physics in the Slovenian Academy of Sciences and Arts. It is named after the distinguished 19th-century physicist Josef Stefan (Slovene: Jožef Stefan), best known for his work on the Stefan–Boltzmann law of black-body radiation

IJS is today involved in a wide variety of fields of scientific and economic interest. After close to 60 years of scientific achievement, the institute has become part of the image of Slovenia.

Over the last 60 years it has created a number of important institutions, such as the University of Nova Gorica, the Jožef Stefan International Postgraduate School and the Ljubljana Technology park.


F1 Theoretical Physics
F2 Low and Medium Energy Physics
F3 Thin Films and Surfaces
F4 Surface Engineering and Optoelectronics
F5 Condensed Matter Physics
F7 Complex Matter
F8 Reactor Physics
F9 Experimental Particle Physics at the Wayback Machine (archived August 6, 2007)
Chemistry and Biochemistry
B1 Biochemistry and Molecular Biology
B2 Molecular and Biomedical Sciences
B3 Biotechnology
K1 Inorganic Chemistry and Technology
K3 Physical and Organic Chemistry
K5 Electronic Ceramics
K6 Engineering Ceramics
K7 Nanostructured Materials
K8 Synthesis of Materials K8
K9 Advanced Materials
O2 Environmental Sciences
Electronics and Information Technologies
E1 Automation, Biocybernetics and Robotics
E2 Systems and Control
E3 Artificial Intelligence
E5 Open Computer Systems and Networks
E6 Communication Systems
E7 Computer Systems
E8 Knowledge Technologies
E9 Intelligent Systems
Reactor Engineering and Energetics
R4 Reactor Engineering
Centre for Knowledge Transfer in Information Technologies
Centre for Electron Microscopy at the Wayback Machine (archived August 12, 2011)
Energy Efficiency Centre at the Wayback Machine (archived October 2, 2011)
Networking Infrastructure Centre
Milan Čopič Nuclear Training Centre at (archived April 15, 2013)
Reactor Infrastructure Centre
Scientific Information Centre Library
Center for Technology Transfer and Innovation


The institute has facilities in two locations. The main facilities and the headquarters are on Jamova 39 in Ljubljana, the other location is the Institute’s Reactor Center Podgorica located in Dol near Ljubljana.


Jožef Stefan Institute
Jamova cesta 39, 1000 Ljubljana
(01) 477 39 00