Efficient near infrared D-π-A sensitizers with lateral anchoring group for dye-sensitized solar cells

摘要

A new strategy in which the anchoring group is separated from the acceptor groups of the dyes was developed; among these dyes, the HY103 dye gives a maximum IPCE value of 86% at 660 nm and an η value of 3.7% in the NIR region reported in DSCs.rnDye-sensitized solar cells (DSCs) have attracted considerable interest due to their relatively high solar energy conversion efficiency and low cost. In the design and synthesis of dyes, in particular organic dyes with Donor-π Spacer-Acceptor (D-π-A) structures among others, two problems remain challenging: new chromophores for sensitization in the near infrared (NIR) region, and new anchoring groups non-coupled to the acceptor parts of the dye molecules. Several NIR dyes, such as phthalocyanine and perylene dyes, have been reported in the literature.