Thiadiazoloquinoxaline-Based Low Band Gap Polymer for Solar Cell Applications

摘要

Polymer solar cells (PSCs) consisting of the photoactive layer containing the interpenetrating network of electron donating polymer and electron accepting PCBM derivative has been proved to be quite effective in converting the solar energy into electrical energy. After many efforts, the power conversion efficiency (PCE) of the solution-processed PSCs was reached up to 9.2% for single layer PSCs and that for the tandem structured PSCs was improved up to 10.7%. The PCE of the PSCs was found to be highly influenced by light harvesting ability of the electron donating polymer. In this instance, development of structurally new polymers having broad absorption band is considered as quite interest in the area of PSCs applications. Recently, we reported the opto-electrical and photovoltaic properties of several NIR absorption polymers incorporating electron accepting thiadiazoloquinoxaline (DQ) derivative and electron donating thiophene-pyrrole(N-aryl)-thiophene (TPyTDzQ), fluorene (PFDQ) or indenofluorene (PIFDQ) derivatives as well as two new thiadiazoloquinoxaline-based organic small molecules (TDQ-SM).