DERIVAȚI CALCONICI CU GRUPA 4-(DIMETILAMINO)FENIL ÎN APLICAȚII FOTOVOLTAICE

Abstract

In this paper, dye-sensitized solar cells (DSSCs) are fabricated and studied using chalconic derivatives as sensitizing dyes. The chalconic derivatives containing the 4-N,N-dimethyl group present two absorption bands with maxima located at the 241 nm and 416 nm, with maximum intensity in the visible region and absorption coefficient of the order 104 cm-1. The analysis of the current-voltage characteristics of the DSSCs with the respective chalconic derivative indicattes the best solar energy conversion efficiency (η = 0.4%), due to the fact that it has the highest absorption value in the band located in the visible region. The best short-circuits current density with value of 2.45 mA/cm2. are obtained for the DSSCs sensitized with chalconic derivative containing 4-N, N-dimethyl SH group.