Lowest excited states and optical absorption spectra of donor–acceptor copolymers for organic photovoltaics: a new picture emerging from tuned long-range corrected density functionals

2012 ◽  
Vol 14 (41) ◽  
pp. 14243 ◽  
Author(s):  
Laxman Pandey ◽  
Curtis Doiron ◽  
John S. Sears ◽  
Jean-Luc Brédas
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
Excited States ◽  
Long Range ◽  
Organic Photovoltaics ◽  
Density Functionals ◽  
Optical Absorption Spectra ◽  
Donor Acceptor

OPTICAL ABSORPTION SPECTRA OF ARSENIC AND PHOSPHORUS IN SILICON

1962 ◽  
Vol 40 (10) ◽  
pp. 1480-1489 ◽  
Author(s):  
J. W. Bichard ◽  
J. C. Giles
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
Excited States ◽  
Ground State ◽  
Absorption Lines ◽  
Full Width ◽  
Optical Absorption Spectra ◽  
Phosphorus Impurity ◽  
Line Widths ◽  
Phosphorus In Silicon

The optical absorption spectra of arsenic and phosphorus donor impurities in silicon have been studied under conditions of improved resolution. Absorption lines due to transitions from the impurity ground state to the excited states 2p0, 2p±, 3p0, 3p±, 4p0, 4 p±, and 5p0, and 5p± have been observed at 4.2° K. The relative intensities of some of these absorption lines are compared with existing experimental and theoretical estimates. The contribution of instrumental broadening to the observed line widths is assessed and natural line widths are estimated. The estimates indicate values for the natural line widths which are much less than those previously reported. For phosphorus impurity, the natural line widths are estimated to be less than 0.08 × 10−3 electron volts full width at half-maximum. The possibility of concentration broadening is discussed in connection with the arsenic data.

Optical absorption spectra of octahedrally bonded Fe3+ in vesuvianite

1968 ◽  
Vol 5 (1) ◽  
pp. 89-92 ◽  
Author(s):  
P. G. Manning
Keyword(s):  
Optical Absorption ◽  
Energy Range ◽  
Absorption Spectra ◽  
Excited States ◽  
Ground State ◽  
Electronic Transitions ◽  
Optical Absorption Spectra ◽  
Sharp Band ◽  
Individual Bands ◽  
The Individual

The optical absorption spectra of green vesuvianite crystals from Lowell County, Vermont, are reported in the energy range 12 000 cm−1 to 30 000 cm−1. The principal absorptions have been attributed to octahedrally bonded Fe3+ and the individual bands have been assigned to spin-forbidden electronic transitions from the 6A1 ground state to excited states in Fe3+. In particular, the 6A1 → 4A14E(G) transition is marked by a relatively sharp band at 21 600 cm−1.

scholarly journals Ring fusion in tetrathienylethene cored perylene diimide tetramers affords acceptors with strong and broad absorption in the near-UV to visible region

2020 ◽  
Vol 8 (48) ◽  
pp. 17237-17244
Author(s):  
Qiao He ◽  
Flurin D. Eisner ◽  
Drew Pearce ◽  
Thomas Hodsden ◽  
Elham Rezasoltani ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Dft Calculations ◽  
Absorption Spectra ◽  
Organic Photovoltaics ◽  
Visible Region ◽  
Perylene Diimide ◽  
Optical Absorption Spectra ◽  
Broad Absorption ◽  
Ring Fusion

Two PDI tetramers with a central tetrathienylethene core were investigated as non-fullerene acceptors in organic photovoltaics and the dramatic differences in their optical absorption spectra were rationalised on the basis of DFT calculations.

Optical absorption spectra of gold clusters Aun(n = 4, 6, 8,12, 20) from long-range corrected functionals with optimal tuning

2012 ◽  
Vol 137 (11) ◽  
pp. 114302 ◽  
Author(s):  
Jessica V. Koppen ◽  
Michał Hapka ◽  
Małgorzata M. Szczęśniak ◽  
Grzegorz Chałasiński
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
Long Range ◽  
Gold Clusters ◽  
Optical Absorption Spectra ◽  
Optimal Tuning
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