Porous silicon : from formation to application edited by Ghenadii Korotcenkov ; Volume 3: Optoelectronics microelectronics and energy technology applications Volume Three highlights porous silicon applications in opto and microelectronics photonics and micromachining. Features of fabrication and performances of photonic crystals fuel cells elements of integral optoelectronics solar cells LED batteries cold cathodes hydrogen generation and storage PSi based composites etc. are analyzed in this volume.