212632-34-3Relevant academic research and scientific papers
Efficient solution-processed bulk heterojunction solar cells by antiparallel supramolecular arrangement of dipolar donor-acceptor dyes
Buerckstuemmer, Hannah,Tulyakova, Elena V.,Deppisch, Manuela,Lenze, Martin R.,Kronenberg, Nils M.,Gsaenger, Marcel,Stolte, Matthias,Meerholz, Klaus,Wuerthner, Frank
scheme or table, p. 11628 - 11632 (2012/01/06)
A series of dipolar donor-acceptor (D-A) chromophores with aminothiophene donor and different heterocyclic acceptor units is reported. By modulation of the acceptor strength, absorption bands over the whole visible spectrum are accessible as well as adjustment of the frontier molecular orbital levels. The performance of the chromophores in blends with fullerene acceptors in solution-processed bulk heterojunction solar cells was studied and related to the molecular properties of the dyes. In particular, the effect of the large ground-state dipole moments of these dyes was investigated by single crystal X-ray analysis, which revealed antiparallel dimers, resulting in an annihilation of the dipole moments. This specific feature of supramolecular organization explains the excellent performance of merocyanine dyes in organic solar cells. With blends of HB366:PC71BM, the most efficient solar cell with a VOC of 1.0 V, a JSC of 10.2 mAcm-2, and a power-conversion efficiency of 4.5% was achieved under standard AM1.5, 100 mWcm-2 conditions. Under reduced lighting conditions, even higher efficiencies up to 5.1% was obtained. Donor-acceptor dyes with an aminothiophene donor show ideal absorption, redox, and packing features in organic photovoltaics (see picture). With blends of HB366:PC71BM, highly efficient solar cells were achieved with a VOC of 1.0 V, a J SC of 10.2 mAcm-2, and a power conversion efficiency of 4.5%. Copyright
Bulk heterojunction organic solar cells based on merocyanine colorants
Kronenberg, Nils M.,Deppisch, Manuela,Wuerthner, Frank,Lademann, Hans W. A.,Deing, Kaja,Meerholz, Klaus
supporting information; experimental part, p. 6489 - 6491 (2009/04/13)
Traditional low-molecular weight colorants that are widely applied in textile coloration, for printing purposes and nonlinear optics, now afford bulk heterojunction solar cells in combination with soluble C60 fullerene derivative PCBM with powe
