scholarly journals Energy Level Modulation of HOMO, LUMO, and Band-Gap in Conjugated Polymers for Organic Photovoltaic Applications

2012 ◽  
Vol 23 (4) ◽  
pp. 439-445 ◽  
Author(s):  
Bong-Gi Kim ◽  
Xiao Ma ◽  
Chelsea Chen ◽  
Yutaka Ie ◽  
Elizabeth W. Coir ◽  
...  
Keyword(s):  
Energy Level ◽  
Conjugated Polymers ◽  
Band Gap ◽  
Organic Photovoltaic ◽  
Photovoltaic Applications ◽  
Homo Lumo

New D–π-A push–pull chromophores as low band gap molecular semiconductors for organic small molecule solar cell applications

2018 ◽  
Vol 5 (5) ◽  
pp. 777-787 ◽  
Author(s):  
Abbasriyaludeen Abdul Raheem ◽  
Santhosh Kamaraj ◽  
Veeman Sannasi ◽  
Chandrasekar Praveen
Keyword(s):  
Solar Cell ◽  
Band Gap ◽  
Energy Levels ◽  
Organic Photovoltaic ◽  
Lumo Energy ◽  
Low Band Gap ◽  
Photovoltaic Applications ◽  
Pull Systems ◽  
Molecular Semiconductors ◽  
Homo Lumo

Low band gap molecular semiconductors based on push–pull systems with appropriate HOMO–LUMO energy levels for organic photovoltaic applications were accomplished.

Narrow band gap benzodithiophene and quinoxaline bearing conjugated polymers for organic photovoltaic applications

2020 ◽  
Vol 180 ◽  
pp. 108479 ◽  
Author(s):  
Meric Caliskan ◽  
Mert Can Erer ◽  
Sultan Taskaya Aslan ◽  
Yasemin Arslan Udum ◽  
Levent Toppare ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Band Gap ◽  
Narrow Band ◽  
Organic Photovoltaic ◽  
Photovoltaic Applications

New –(D–A1–D–A2)n– type conjugated polymers for photovoltaic applications: consensus between low band-gap and low HOMO energy level

Tetrahedron ◽  
2013 ◽  
Vol 69 (16) ◽  
pp. 3419-3424 ◽  
Author(s):  
Xiaolian Hu ◽  
Weifei Fu ◽  
Lijian Zuo ◽  
Hangqi Shi ◽  
Meirong Chen ◽  
...  
Keyword(s):  
Energy Level ◽  
Conjugated Polymers ◽  
Band Gap ◽  
Homo Energy ◽  
Low Band Gap ◽  
Photovoltaic Applications ◽  
Homo Energy Level

scholarly journals Synthesis of bistriphenylamine- and benzodithiophene-based random conjugated polymers for organic photovoltaic applications

2017 ◽  
Vol 55 (22) ◽  
pp. 3705-3715 ◽  
Author(s):  
Asli Cetin ◽  
Cagla Istanbulluoglu ◽  
Serife Ozdemir Hacioglu ◽  
Sevki Can Cevher ◽  
Levent Toppare ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Organic Photovoltaic ◽  
Photovoltaic Applications

Energy level tuning of ‘Z’-shaped small molecular non-fullerene electron acceptors based on a dipyrrolo[2,3-b:2′,3′-e]pyrazine-2,6(1H,5H)-dione acceptor unit for organic photovoltaic applications: a joint experimental and DFT investigation on the effect of fluorination

2019 ◽  
Vol 43 (13) ◽  
pp. 5173-5186 ◽  
Author(s):  
Gangala Sivakumar ◽  
Mahalingavelar Paramasivam ◽  
Dyaga Bharath ◽  
Vaidya Jayathirtha Rao
Keyword(s):  
Energy Level ◽  
Small Molecule ◽  
Electron Acceptors ◽  
Organic Photovoltaic ◽  
Photovoltaic Applications

Three dipyrrolo[2,3-b:2′,3′-e]pyrazine-2,6(1H,5H)-dione based small molecule non-fullerene acceptors with various end-capped fluorine units have been investigated.

Flat conjugated polymers combining a relatively low HOMO energy level and band gap: polyselenophenes versus polythiophenes

2012 ◽  
Vol 22 (29) ◽  
pp. 14645 ◽  
Author(s):  
Elena Poverenov ◽  
Yana Sheynin ◽  
Natalia Zamoshchik ◽  
Asit Patra ◽  
Gregory Leitus ◽  
...  
Keyword(s):  
Energy Level ◽  
Conjugated Polymers ◽  
Band Gap ◽  
Homo Energy ◽  
Homo Energy Level

scholarly journals New chromophores based on combination of ethylenedioxythiophene and carbazole fragments: synthesis and optoelectronic properties

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
A.N. Bakiev ◽  
O.A. Mayorova ◽  
A.A. Gorbunov ◽  
I.V. Lunegov ◽  
E.V. Shklyaeva ◽  
...  
Keyword(s):  
Band Gap ◽  
Visible Spectrum ◽  
Band Gap Energy ◽  
Gap Energy ◽  
Good Solubility ◽  
Film Forming ◽  
Photovoltaic Applications ◽  
Key Steps ◽  
Homo Lumo ◽  
Stokes Shifts

AbstractTwo new D-π-A chromophores composed of an electron-donating carbazole unit linked through π- bridges, bearing 3,4-ethylenedioxythiophene (EDOT) moiety, with an electron withdrawing dicyanovinyl group (DCV) were successfully synthesized involving Suzuki or Heck cross-coupling and Knöevenagel reactions as the key steps. The obtained compounds absorb light over a broad spectral range, including the visible spectrum. The HOMO/LUMO energies and band gap energy values (Eg) were calculated on the basis of the experimental optical and electrochemical data: HOMO, LUMO, Eg (eV), −5.51, −3.14, 2.37 (4), −5.34, −3.14, 2.20 (7). The presence of the HC=CH unit in compound 7 resulted in the increase of the HOMO energy level, the decrease of a band gap value and red shifts of the absorption and emission bands in comparison with those of 4. Large Stokes shifts and broadband luminescence inherent to both chromophores suggest their use as materials for luminescent solar collectors (LSCs). The obtained compounds demonstrated good solubility and suitable thin-film forming properties. For this reason, they may be suitable for solution-processable photovoltaic applications.

Novel electron-acceptor conjugated polymer materials based on poly(thienylene ethynylene) derivatives

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Kuan Liu ◽  
Yang Li ◽  
Mujie Yang
Keyword(s):  
Optical Properties ◽  
Conjugated Polymers ◽  
Ftir Spectroscopy ◽  
Band Gap ◽  
Organic Solvents ◽  
Electron Acceptor ◽  
Conjugated Polymer ◽  
Polymer Materials ◽  
Photovoltaic Applications

AbstractNovel electron-acceptor materials based on poly(thienylene ethynylene) derivatives (PTE-BT and PTE-DCNTB) were synthesized and characterized by FTIR spectroscopy. Their thermal, electrochemical and optical properties were investigated. The π-conjugated polymers are soluble in common organic solvents. The maximum UV-Vis absorptions of PTE-BT and PTE-DCNTB in solution are observed at 460 and 390 nm, respectively. The electrochemical band gap was found to be 1.89 eV for PTE-BT and 2.01 eV for PTE-DCNTB. Both polymers are promising as electron-acceptor materials for photovoltaic applications.

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