Novel donor/acceptor setup for dye sensitized solar cells based on an aliphatic bridge. Computational design and experimental essay.

PRISCILA A. LANZA-CASTRONUOVO; DIEGO DUSSO; CRISTINA L. RAMIREZ; ALEJANDRO R. PARISE; E. LAURA MOYANO; CARLOS A. CHESTA

Villa Carlos Paz

Encuentro; XIII Encuentro Latinoamericano de Fotoquímica; 2017

p { margin-bottom: 0.1in; direction: ltr; color: rgb(0, 0, 0); line-height: 120%; }p.western { font-family: "Times New Roman",serif; font-size: 12pt; }p.cjk { font-family: "MS Mincho","ＭＳ 明朝",monospace; font-size: 12pt; }p.ctl { font-family: "Times New Roman",serif; font-size: 12pt; }a:link { color: rgb(0, 0, 255); } Dyesensitized solar cells (DSSCs) are usually based on a rod moleculeconnected to a semiconductor or nanoparticle. The rod organic dyebears a donor (D) and an acceptor (A) moieties connected through aconjugated psystem bridge (D-p-A).[1]Upon photoexcitation, the charge separation drawn in the lowestsinglet (S1)state(orin the relaxed S1*state) isharnessed to store electrons into the semiconductor. An efficientcharge separation in the S1state is the first requirement for a working DSSC, appart from manyother factors which could enhace or deplete the efficiency, the fastcharge recombination (back electron transfer) being one of the mostrelevant. Recently,[2] a Tröger base bridge (hereafter -sT-),a strained heterocycle, has been proposed as an efficient but alsoselective bridge, capable of mediating the charge separation.