A novel family of six donor–acceptor type organic sensitizers for dye-sensitized solar cells (DSSCs) is reported. The dyes

have been designed to have outstanding light absorption properties in the visible range and being able to achieve high

photon-to-electrical current conversion for BIPV (building-integrated photovoltaic). Moreover, stability tests under illumination

at 1 Sun and 65 1C showed a great stability for some of the devices, with less than 6% decrease of power conversion

efficiency after 3000 hours. The differences in the performance of the six sensitizers under standard illumination

conditions can be correlated with the observed differences in the photo-induced transient photovoltage and in charge

extraction measurements. We report the use of one of the dyes for the fabrication of semi-transparent

solar modules showing an active area of 1400 cm2 and a power output of 10.5 W m-2