**Preface to "Organic and Hybrid Materials for Photovoltaic and Photonic Applications"**

This book, with a collection of seven original contributions and three literature reviews, offers select examples of photovoltaic and photonic applications of organic and hybrid materials. The first review by Prof. Sforazzini G. et al. presents a brief introduction to organic solar cells, discussing the principles for formation of free charges, and the requirement for a favorable morphology of the active layer. The second review by Prof. Cabanillas Gonzalez J. et al. discusses the main developments in the field of organic crystal lasers, describing briefly the photophysics and figures-of-merit of organic semiconductor micro/nanocrystals in terms of optical gain properties. The third review by Dr Pasini M. et al. focuses to the use of an emerging class of molecules based on BODIPY in the two main applications described in this Special Issue. The original contributions address our topic by different points of view: from chemical development of new materials, photophysical characterisations, and final applications.

**Tersilla Virgili and Mariacecilia Pasini**

*Editors*
