Thiazole as a weak electron-donor unit to lower the frontier orbital energy levels of donor–acceptor alternating conjugated materials

2013 ◽  
Vol 49 (85) ◽  
pp. 9938 ◽  
Author(s):  
Elena Zaborova ◽  
Patricia Chávez ◽  
Rony Bechara ◽  
Patrick Lévêque ◽  
Thomas Heiser ◽  
...  
Keyword(s):  
Electron Donor ◽  
Energy Levels ◽  
Orbital Energy ◽  
Frontier Orbital ◽  
Conjugated Materials ◽  
Donor Acceptor ◽  
Weak Electron ◽  
Frontier Orbital Energy

scholarly journals Multiple Charge Transfer States in Donor–Acceptor Heterojunctions with Large Frontier Orbital Energy Offsets

2019 ◽  
Vol 31 (17) ◽  
pp. 6808-6817 ◽  
Author(s):  
Saeed-Uz-Zaman Khan ◽  
Giacomo Londi ◽  
Xiao Liu ◽  
Michael A. Fusella ◽  
Gabriele D’Avino ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Orbital Energy ◽  
Frontier Orbital ◽  
Donor Acceptor ◽  
Multiple Charge ◽  
Frontier Orbital Energy

Fine tuning of frontier orbital energy levels in dithieno[3,2-b:2′,3′-d]silole-based copolymers based on the substituent effect of phenyl pendants

Polymer ◽  
2014 ◽  
Vol 55 (9) ◽  
pp. 2139-2145 ◽  
Author(s):  
Tomoyuki Ikai ◽  
Tomoya Kudo ◽  
Masahiro Nagaki ◽  
Tomoyuki Yamamoto ◽  
Katsuhiro Maeda ◽  
...  
Keyword(s):  
Substituent Effect ◽  
Energy Levels ◽  
Fine Tuning ◽  
Orbital Energy ◽  
Frontier Orbital ◽  
Frontier Orbital Energy

A–D–A-type S,N-heteropentacene-based hole transport materials for dopant-free perovskite solar cells

2015 ◽  
Vol 3 (34) ◽  
pp. 17738-17746 ◽  
Author(s):  
Christopher Steck ◽  
Marius Franckevičius ◽  
Shaik Mohammed Zakeeruddin ◽  
Amaresh Mishra ◽  
Peter Bäuerle ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Levels ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Orbital Energy ◽  
Frontier Orbital ◽  
Conversion Efficiencies ◽  
Frontier Orbital Energy

Heteropentacene-based A–D–A type hole transport materials with suitable frontier orbital energy levels were synthesized and used in perovskite solar cells showing power conversion efficiencies up to 11.4%.

Electrochemical Considerations for Determining Absolute Frontier Orbital Energy Levels of Conjugated Polymers for Solar Cell Applications

2011 ◽  
Vol 23 (20) ◽  
pp. 2367-2371 ◽  
Author(s):  
Claudia M. Cardona ◽  
Wei Li ◽  
Angel E. Kaifer ◽  
David Stockdale ◽  
Guillermo C. Bazan
Keyword(s):  
Solar Cell ◽  
Conjugated Polymers ◽  
Energy Levels ◽  
Orbital Energy ◽  
Frontier Orbital ◽  
Frontier Orbital Energy

Synthesis of a new W-type of functional polymer for improving intermolecular charge transfer processes at donor/acceptor interfaces

2019 ◽  
Vol 31 (5) ◽  
pp. 521-527 ◽  
Author(s):  
Yun-Fan Zhang ◽  
Fawen Wu
Keyword(s):  
Charge Transfer ◽  
Energy Gap ◽  
Energy Levels ◽  
Coupling Reaction ◽  
Photocurrent Density ◽  
Orbital Energy ◽  
Functional Polymer ◽  
Suzuki Coupling Reaction ◽  
Donor Acceptor ◽  
Lowest Unoccupied Molecular Orbital

Optimizing charge transfer (CT) processes at donor/acceptor interfaces is an important subject to improving photocurrent density. Geometries of functional polymers play important roles in design of new types of polymers, which were used as electron donor to improve effective separation of electron-hole pairs at donor/acceptor interfaces. In this article, a novel W-type of polymer, poly(1-[4-(9-(2-ethylhexyl)carbazole-3-yl)]phenylazo-2-phenylazoacenaphthylene), was synthesized by a Suzuki coupling reaction for improving interaction between polymers and electron acceptors to enhance intermolecular CT. Geometry of combination of the polymer and C60 shows that main-chain of the polymer could sufficiently touch C60 derivatives. The polymer exhibited a broadband light absorption at the wavelength range from 250 to 650 nm. Ultraviolet–visible spectra and cyclic voltammetry curve suggest that the highest occupied, lowest unoccupied molecular orbital energy levels, and energy gap values are −5.09, −3.18 and 1.91 eV. Fluorescence quenching experiments shows that 99.9% of emission fluorescence of the polymer was quenched by added C60. Therefore, excited electrons at the polymer would be completely transferred to C60 molecules. This article suggests a new W-type functional polymer for improving intermolecular CT processes at donor/acceptor interfaces.

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