The present invention discloses organic and inorganic photosensitizer dyes as the following formulas (1) to (3), wherein the substituents “A, B, D and G” are as defined in claim
1
.
Two unsymmetricalsquaraines, where the electron-rich 3,4-ethylenedioxythiophene or bithiophene conjugated fragment was used to link unconventionally the squaraine core and the hexyloxyphenyl amino group, were applied for DSCs. The corresponding photovoltaic devices exhibit an attractively panchromatic response and also convert a portion of the near-infrared photons into electricity.