Master's final project which overall goal is to create awareness about the main challenges for world energy access and to assist agents of change in driving a paradigm shift in our society: the alleviation of energy poverty. The specific objectives are: to gain a better understanding of the worldwide energy access and financing status quo, as well as the relation between sustainable energy and international development ; to examine small-scale modern energy access projects implemented through innovative business models and financing schemes, and analyze their potential in helping breach the energy access and financing gaps ; and to design and propose specific tools that create added value and help determine best options and suitability for the implementation of each mechanism presented -CSR, CDM and microfinancing- Proyecto fin de master cuyo objetivo principal es obtener una mejor comprensión del acceso a la energía en todo el mundo y de la relación entre energía sostenible y desarrollo internacional, y examinar y proponer proyectos a pequeña escala que acerquen la energía a las zonas donde es más complicado que llegue de manera natural. Incluye resumen ejecutivo