TY - SER AU - Lysen, Erik TI - Photovoltaics: an outlook for the 21st century KW - PHOTOVOLTAIC ENERGY KW - GLOBAL INSTALLED CAPACITY N1 - The global installed capacity of PV could increase to an estimated 207 GWp by 2020, providing expected price reductions can be achieved, good levels of industry co-operation are achieved, and the right financial support mechanisms are in place ER -