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 new unsymmetricalsquaraines (WCH-SQ10 and WCH-SQ11), wherein the electron-rich 3,4-ethylenedioxy-thiophene conjugated fragment was linked unconventionally to the squaraine core and triphenyl amine donor, and carboxylic acid substituted quinoline was used as an acceptor, were prepared. WCH-SQ10 and WCH-SQ11 dyes in ethanol have the λmax of 686 and 673 nm, respectively. The corresponding photovoltaic