| abstract |
The present invention relates to synthons containing a carbazole ring and / or a fluorene ring, their preparation and their use for the preparation of π-conjugated compounds useful in organic optoelectronics in general such as a photovoltaic solar cell with photosensitive dye (DSSC ), a quantum dot photovoltaic solar cell, a hybrid photovoltaic solar cell, an organic photovoltaic solar cell, a perovskite photovoltaic solar cell, an organic light-emitting diode (OLEDs) and an organic field effect transistor (OFETs). |