Computational design of small phenothiazine dyes for dye-sensitized solar cells by functionalizations affecting the thiophene unit
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| 024 | 7 | 0 | |a 10.1007/s00894-015-2624-2 |2 doi |
| 035 | |a (NATIONALLICENCE)springer-10.1007/s00894-015-2624-2 | ||
| 245 | 0 | 0 | |a Computational design of small phenothiazine dyes for dye-sensitized solar cells by functionalizations affecting the thiophene unit |h [Elektronische Daten] |c [Wei Tu, Yi Tan, Omkar Rege, Sergei Manzhos] |
| 520 | 3 | |a We present a computational density functional theory study of the potential to improve the solar absorbance of small organic dyes featuring a phenothiazine donor and an acceptor moiety that combines a thiophene unit and a cyanoacrylic group. We consider different conjugation orders and functional groups on and around the thiophene unit, including electron-donating and electron-withdrawing moieties (H, F, CH3, CF3, and CN). We predict that by combining change of conjugation order and functionalization with electron withdrawing CN groups, it must be possible to decrease the excitation energy by up to 60 % vs. the parent dye (which would correspond to a redshift of the absorption peak maximum from 450 nm to 726 nm), effectively enabling red light absorption with small dyes. The contraction of the band gap is mostly due to the stabilization of the LUMO (by up to 1.8eV), so that—in spite of the kinetic redundancy of the parent dye with respect to the conduction-band minimum of TiO2—care must be taken to ensure efficient injection when using the dyes in dye-sensitized solar cells. By studying 50 dyes, of which 44 are new dyes that are studied for the first time in this work, we identify parameters (such as charges, dihedral angles between donor and acceptor groups, bond length alternation) which can serve as predictors of the band gap. We find that bond length alternation or dihedral angles are not good predictors, while the charge on the thiophene unit is. | |
| 540 | |a Springer-Verlag Berlin Heidelberg, 2015 | ||
| 690 | 7 | |a Dye-sensitized solar cells |2 nationallicence | |
| 690 | 7 | |a Organic dye |2 nationallicence | |
| 690 | 7 | |a Density functional theory |2 nationallicence | |
| 690 | 7 | |a Conjugation order |2 nationallicence | |
| 690 | 7 | |a Thiophene |2 nationallicence | |
| 690 | 7 | |a Phenothiazine |2 nationallicence | |
| 700 | 1 | |a Tu |D Wei |u Anderson Junior College, 4500 Ang Mo Kio Avenue 6, 569843, Singapore, Singapore |4 aut | |
| 700 | 1 | |a Tan |D Yi |u Raffles Institution, 1 Raffles Institution Lane, 575954, Singapore, Singapore |4 aut | |
| 700 | 1 | |a Rege |D Omkar |u Department of Mechanical Engineering, University of Illinois, 1206 W. Green St., 61801, Urbana, IL, USA |4 aut | |
| 700 | 1 | |a Manzhos |D Sergei |u Department of Mechanical Engineering, National University of Singapore, Block EA #07-08, 9 Engineering Drive 1, 117576, Singapore, Singapore |4 aut | |
| 773 | 0 | |t Journal of Molecular Modeling |d Springer Berlin Heidelberg |g 21/4(2015-04-01), 1-13 |x 1610-2940 |q 21:4<1 |1 2015 |2 21 |o 894 | |
| 856 | 4 | 0 | |u https://doi.org/10.1007/s00894-015-2624-2 |q text/html |z Onlinezugriff via DOI |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 900 | 7 | |a Metadata rights reserved |b Springer special CC-BY-NC licence |2 nationallicence | |
| 908 | |D 1 |a research-article |2 jats | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-springer | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1007/s00894-015-2624-2 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Tu |D Wei |u Anderson Junior College, 4500 Ang Mo Kio Avenue 6, 569843, Singapore, Singapore |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Tan |D Yi |u Raffles Institution, 1 Raffles Institution Lane, 575954, Singapore, Singapore |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Rege |D Omkar |u Department of Mechanical Engineering, University of Illinois, 1206 W. Green St., 61801, Urbana, IL, USA |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Manzhos |D Sergei |u Department of Mechanical Engineering, National University of Singapore, Block EA #07-08, 9 Engineering Drive 1, 117576, Singapore, Singapore |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Journal of Molecular Modeling |d Springer Berlin Heidelberg |g 21/4(2015-04-01), 1-13 |x 1610-2940 |q 21:4<1 |1 2015 |2 21 |o 894 | ||