Systematic radical species control by electron push–pull substitution in the perylene-based D–π–A compounds

Abstract

(D–π–A)˙− & (D–π–A)˙+ are generated in response to electrical stimulation. Unlike (D–π–A)˙−, (D–π–A)˙+ shows a systematically controllable substituent effect by the DPA R group ranging from electron-withdrawing F to electron-donating OMe group.

An Indacenodithieno[3,2‐b]thiophene‐based Organic Dye for P‐type Dye‐Sensitized Solar Cells and Photoelectrochemical H2O2 Production

“…[19,20] In such a structure, the energy level of the lowest unoccupied molecular orbital (LUMO) is primarily influenced by the electron acceptor moiety, while the highest occupied molecular orbital (HOMO) is predominantly affected by the electron donor moiety. [21] A notable distinction of dyes used in the p-type photocathode, as compared to the n-type photoanode, is that the electron donor moiety of the organic dye is designed to bind to the metal oxide semiconductor surface rather than the electron acceptor moiety, facilitating hole injection from the dye to valence band (VB) of the p-type semiconductor. To enable efficient intramolecular charge transfer (ICT) between the donor and acceptor moieties, a suitable π-bridge must be selected to connect the two parts.…”

“…One of effective strategies for designing high‐performance organic dye photosensitizers involves the configuration of a donor‐acceptor (D–A) molecular structure [19,20] . In such a structure, the energy level of the lowest unoccupied molecular orbital (LUMO) is primarily influenced by the electron acceptor moiety, while the highest occupied molecular orbital (HOMO) is predominantly affected by the electron donor moiety [21] . A notable distinction of dyes used in the p‐type photocathode, as compared to the n‐type photoanode, is that the electron donor moiety of the organic dye is designed to bind to the metal oxide semiconductor surface rather than the electron acceptor moiety, facilitating hole injection from the dye to valence band (VB) of the p‐type semiconductor.…”