Fine-tuning the Electronic Structure of Organic Dyes for Dye-Sensitized Solar Cells
摘要:
A series of metal-free organic dyes exploiting different combinations of (hetero)cyclic linkers (benzene, thiophene, and thiazole) and bridges (4H-cyclopenta[2,1-b:3,4-b']dithiophene (CPDT) and benzodithiophene (BDT)) as the central pi-spacers were synthesized and characterized. Among them, the sensitizer containing the thiophene and CPDT showed the most broad incident photon-to-current conversion efficiency spectra, resulting in a solar energy conversion efficiency (eta) of 6.6%.
push–pull type meso-ester substituted BODIPY dyes 1–4 with intense near-infrared absorption, largely enhanced photoacoustic (PA) activity and excellent photo-stability were synthesized. The impact of the electronic structure on the PA activity was also discussed. Moreover, the in vitro and in vivo PA imaging were investigated, which suggested a passive targeting capacity in the tumor site.
Regioisomeric Effects on the Electronic Features of Indenothiophene-Bridged D-π-A′-A DSSC Sensitizers
作者:Shu-Hua Chou、Chih-Hung Tsai、Chung-Chih Wu、Dhirendra Kumar、Ken-Tsung Wong
DOI:10.1002/chem.201403584
日期:2014.12.8
Two D–π‐A′–A regioisomers (A‐IDT‐D and D‐IDT‐A) featuring 4,4′‐di‐p‐tolyl‐4 H‐indeno[1,2‐b]‐thiophene as a π linker (π) between the diarylamino donor (D) and the pyrimidine–cyanoacrylic acid acceptor (A′–A) have been successfully synthesized and characterized as efficient sensitizers for the dye‐sensitized solar cells (DSSCs). The different arrangements of the D and A′–A blocks on the unsymmetrical
A series of new pushâpull organic dyes incorporating electron-deficient pyrimidine as the Ï-spacer have been synthesized, characterized, and used as the sensitizers for dye-sensitized solar cells (DSSCs). In comparison with the model compound M-TP, which adopts phenylene as the Ï-spacer, the tailor-made dyes display enhanced spectral responses in the red portion of the solar spectrum. Through the introduction of two hexyloxy chains on the diphenylthienylamine donor, the DSSC employing dye OHexDPTP exhibited high power conversion efficiency up to 7.64% under AM1.5G irradiation.