Tuning the frontier molecular orbital energy levels ofn-type conjugated copolymers by using angular-shaped naphthalene tetracarboxylic diimides, and their use in all-polymer solar cells with high open-circuit voltages

2013 ◽  
Vol 51 (9) ◽  
pp. 1999-2005 ◽  
Author(s):  
Shan-Ci Chen ◽  
Qingdong Zheng ◽  
Qikai Zhang ◽  
Dongdong Cai ◽  
Jinyun Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Molecular Orbital ◽  
Polymer Solar Cells ◽  
Energy Levels ◽  
Open Circuit ◽  
Frontier Molecular Orbital ◽  
Orbital Energy ◽  
Molecular Orbital Energy ◽  
Open Circuit Voltages ◽  
Conjugated Copolymers

Spiro[fluorene-9,9′-xanthene]-based universal hosts for understanding structure–property relationships in RGB and white PhOLEDs

RSC Advances ◽  
2015 ◽  
Vol 5 (38) ◽  
pp. 29828-29836 ◽  
Author(s):  
Yan Qian ◽  
Yeren Ni ◽  
Shouzhen Yue ◽  
Wenwen Li ◽  
Shufen Chen ◽  
...  
Keyword(s):  
Energy Level ◽  
Molecular Orbital ◽  
Energy Levels ◽  
Frontier Molecular Orbital ◽  
Orbital Energy ◽  
Structure Property ◽  
Triplet Energy ◽  
Structure Property Relationships ◽  
Molecular Orbital Energy

Independent and accumulative modification of frontier molecular orbital energy levels without affecting the triplet energy level can be realized.

High open circuit voltage organic solar cells based upon fullerene free bulk heterojunction active layers

2014 ◽  
Vol 92 (10) ◽  
pp. 932-939 ◽  
Author(s):  
Ala’a F. Eftaiha ◽  
Jon-Paul Sun ◽  
Arthur D. Hendsbee ◽  
Casper Macaulay ◽  
Ian G. Hill ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Open Circuit Voltage ◽  
Field Effect Transistors ◽  
Bulk Heterojunction ◽  
Energy Levels ◽  
Open Circuit ◽  
Frontier Molecular Orbital ◽  
Orbital Energy ◽  
High Electron

We have recently reported on a small organic molecule containing a bithiophene core with end-capping phthalimide units (PthTh2Pth) that exhibited a H-aggregation tendency in the solid state and high electron mobility in organic field effect transistors. In this contribution, we have studied both the physical and electrical properties of poly(3-hexylthiophene) (P3HT) and PthTh2Pth thin films by measuring the optical absorption, Frontier molecular orbital energy levels, photoluminescence quenching, thermal properties, and photovoltaic response. Our results have provided a useful insight into the use of PthTh2Pth as an electron acceptor material for organic photovoltaic applications. In comparison with high-performance, fullerene-based, solution-processed bulk heterojunction solar cells reported in the literature, a relatively high open circuit voltage (∼0.94 V) was obtained for various donor–acceptor blend ratios. These results highlight the potential for PthTh2Pth to act as an alternative to fullerenes as acceptors in organic solar cell devices.

Predictably tuning the frontier molecular orbital energy levels of panchromatic low band gap BODIPY-based conjugated polymers

2012 ◽  
Vol 3 (10) ◽  
pp. 3093 ◽  
Author(s):  
Bhooshan C. Popere ◽  
Andrea M. Della Pelle ◽  
Ambata Poe ◽  
Ganapathy Balaji ◽  
S. Thayumanavan
Keyword(s):  
Conjugated Polymers ◽  
Band Gap ◽  
Molecular Orbital ◽  
Energy Levels ◽  
Frontier Molecular Orbital ◽  
Orbital Energy ◽  
Low Band Gap ◽  
Molecular Orbital Energy

scholarly journals Light-Controlled Reversible Modulation of Frontier Molecular Orbital Energy Levels in Trifluoromethylated Diarylethenes

2017 ◽  
Vol 23 (15) ◽  
pp. 3743-3754 ◽  
Author(s):  
Martin Herder ◽  
Fabian Eisenreich ◽  
Aurelio Bonasera ◽  
Anna Grafl ◽  
Lutz Grubert ◽  
...  
Keyword(s):  
Molecular Orbital ◽  
Energy Levels ◽  
Frontier Molecular Orbital ◽  
Orbital Energy ◽  
Molecular Orbital Energy

scholarly journals QTAIM investigation of bis(pyrazol-1-yl)methane derivative and its Zn(II) complexes (ZnLX2, X=Cl, Br or I)

2015 ◽  
Vol 80 (8) ◽  
pp. 997-1008 ◽  
Author(s):  
Maryam Dehestani ◽  
Leila Zeidabadinejad
Keyword(s):  
Molecular Orbital ◽  
Critical Points ◽  
Structural Parameters ◽  
Frontier Molecular Orbital ◽  
Orbital Energy ◽  
Theory Approach ◽  
Topological Parameters ◽  
Molecular Orbital Energy ◽  
Highest Occupied Molecular Orbital ◽  
Lowest Unoccupied Molecular Orbital

Topological analyses of the electron density using the quantum theory of atoms in molecules (QTAIM) have been carried out at the B3PW91/6-31g (d) theoretical level, on bis(pyrazol-1-yl)methanes derivatives 9-(4-(di (1H-pyrazol-1-yl)-methyl)phenyl)-9H-carbazole (L) and its zinc(II) complexes: ZnLCl2 (1), ZnLBr2 (2) and ZnLI2 (3). The topological parameters derived from Bader theory were also analyzed; these are characteristics of Zn-bond critical points and also of ring critical points. The calculated structural parameters are the frontier molecular orbital energies highest occupied molecular orbital energy (EHOMO), lowest unoccupied molecular orbital energy (ELUMO), hardness (?), softness (S), the absolute electronegativity (?), the electrophilicity index (?) and the fractions of electrons transferred (?N) from ZnLX2 complexes to L. The numerous correlations and dependencies between energy terms of the Symmetry Adapted Perturbation Theory approach (SAPT), geometrical, topological and energetic parameters were detected and described.

Semi-empirical Molecular Orbital Energy Levels of the Hexammine and Chloroammine Complexes of Co(IV)

1967 ◽  
Vol 22 (2) ◽  
pp. 170-175 ◽  
Author(s):  
Walter A. Yeranos ◽  
David A. Hasman
Keyword(s):  
Molecular Orbital ◽  
Energy Levels ◽  
Empirical Evaluation ◽  
Wave Functions ◽  
Electronic Transitions ◽  
Orbital Energy ◽  
Molecular Orbital Energy ◽  
The One ◽  
Semi Empirical

Using the recently proposed reciprocal mean for the semi-empirical evaluation of resonance integrals, as well as approximate SCF wave functions for Co3+, the one-electron molecular energy levels of Co (NH3) 3+, Co (NH3) 5Cl2+, and Co (NH3) 4Cl21+ have been redetermined within the WOLFSBERG–HELMHOLZ approximation. The outcome of the study fits remarkably well with the observed electronic transitions in the u.v. spectra of these complexes and prompts different band assignments than previously suggested.

Ladder-type dithienocyclopentadibenzothiophene-cored wide-bandgap polymers for efficient non-fullerene solar cells with large open-circuit voltages

2019 ◽  
Vol 7 (7) ◽  
pp. 3307-3316 ◽  
Author(s):  
Qisheng Tu ◽  
Changquan Tang ◽  
Qingdong Zheng
Keyword(s):  
Solar Cells ◽  
Polymer Solar Cells ◽  
Wide Bandgap ◽  
Open Circuit ◽  
Open Circuit Voltages ◽  
Excellent Stability

Novel wide-bandgap copolymers based on ladder-type dithienocyclopentadibenzothiophene were developed for polymer solar cells with 9.46% efficiency and excellent stability.

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