Preparation of a D–A polymer with disilanobithiophene as a new donor component and application to high-voltage bulk heterojunction polymer solar cells†
Abstract
A low band gap polymer composed of alternating (tetrabutyldisilano)bithiophene-benzothiadiazole units, whose absorption edge reached approximately 760 nm as a film, was prepared. A bulk heterojunction polymer solar cell was fabricated using the present polymer to provide a power conversion efficiency of 6.38% with a high Voc of 0.82 V.