The 5th International Symposium on Blue Laser and Light Emitting Diodes (ISBLLED--2004) was held in Gyeongju, Korea, 15--19 March 2004.

The 5th International Symposium on Blue Laser and Light Emitting Diodes (ISBLLED-2004) was held in Gyeongju, Korea, 15-19 March 2004. The purpose of the symposium was to provide a forum for scientists and engineers to discuss recent progress and future trends in the rapidly advancing wide band gap semiconductor science and technologies and their applications in blue laser and light emitting diodes. physica status solidi (c) - conferences and critical reviews publishes conference proceedings, ranging from large international meetings to specialized topical workshops as well as collections of topical reviews on various areas of current solid state physics research.

Preface.
Committees.
Optoelectronic devices.
LED Highlight Session.
Growth and characterization.
Nano and quantum structures.
Contacts.
Zinc oxide.
Indium nitride and indium rich InGaN.
Others.
Author Index.