A new aspect of cyclopentadithiophene based polymers: narrow band gap polymers upon protonation

2015 ◽  
Vol 51 (67) ◽  
pp. 13229-13232 ◽  
Author(s):  
Tao Tang ◽  
Tingting Lin ◽  
FuKe Wang ◽  
Chaobin He
Keyword(s):  
Conjugated Polymers ◽  
Band Gap ◽  
Electronic Properties ◽  
Narrow Band ◽  
Optical And Electronic Properties ◽  
Significant Change

A new aspect of CPDT based conjugated polymers that CPDT units in the polymers can be protonated with a significant change in optical and electronic properties was reported.

Modulation of the Electronic Properties in Polydithienotiiophene Materials

1997 ◽  
Vol 488 ◽  
Author(s):  
C. Arbizzani ◽  
M. Catellani ◽  
S. Luzzati ◽  
M. Mastragostino
Keyword(s):  
Conjugated Polymers ◽  
Band Gap ◽  
Electronic Properties ◽  
Narrow Band ◽  
Electrochemical Characterizations ◽  
Monomer Ratio ◽  
Electrochemical Devices

AbstractConjugated polymers with narrow band gap are promising candidates for symmetric electrochemical devices, such as electrochromics and redox supercapacitors, which involve the pand n-doped state of the polymer. Polydithienothiophene materials which are prepared from isomer monomers show this characteristic. The copolymerisation of two dithienothiophene isomers leads to materials whose electronic properties depend on the monomer ratio. Optical and electrochemical characterizations of different copolymers are reported and discussed.

Variable band gap conjugated polymers for optoelectronic and redox applications

2005 ◽  
Vol 20 (12) ◽  
pp. 3188-3198 ◽  
Author(s):  
Young-Gi Kim ◽  
Barry C. Thompson ◽  
Nisha Ananthakrishnan ◽  
G. Padmanaban ◽  
S. Ramakrishnan ◽  
...  
Keyword(s):  
Phase Separation ◽  
Conjugated Polymers ◽  
Band Gap ◽  
Conjugated Polymer ◽  
Narrow Band ◽  
Acid Methyl Ester ◽  
Light Emitting ◽  
Donor And Acceptor ◽  
Color Tunable ◽  
Variable Band Gap

We report here on the utilization of variable band gap conjugated polymers for optoelectronic redox applications comprising organic photovoltaics, color tunable light emitting diodes, and electrochromics. For the evaluation of morphology in photovoltaicdevices, atomic force microscopy, and optical microscopy provided direct visualization of the blend film structure. The evolution of the morphology in two and three component blends incorporating poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenlenevinylene] (MEH-PPV), poly(methylmethacrylate) (PMMA), and [6, 6]-phenyl C61-butyric acid methyl ester (PCBM) was investigated. It was found that while insulating PMMA can be used to modulate the phase separation in these blends, a bicontinuous network of donor and acceptor was required to achieve the best device results. Similarily, a MEH-PPVcopolymer with a decreased conjugation length has been used for investigating inter- and intramolecular photoinduced charge transfer in the presence of PMMA and PCBM.We fabricated MEH-PPV/PCBM solar cells that have power conversion efficiencies up to 1.5% with a range of 0.7–1.5%, dependent on the nature of the MEH-PPV used. This further indicates that in addition to blend morphology, polymer structure is critical for optimizing device performance. To this end, the concept of an ideal donor for photovoltaic devices based on poly[2,5-di(3,7-dialkoxy)-cyanoterephthalylidene] is described and two donor-acceptor polymers based on cyanovinylene (CNV) and dioxythiophene are discussed as representative examples of soluble narrow band gap polymers synthesized in our group. For light emitting applications, utilization of two blue emitting conjugated polymers poly (9,9-dioctylfluorene) (PFO) and poly[(9,9-dihexylfluorenyl-2,7-diyl)-co-(9,ethyl-3,6-carbazole)] (PFH-PEtCz)is presented for a color tunable polymer light emitting diode that emits orange, green, and blue light with a voltage range of 7–10 V as a function of the total conjugated polymer content in PMMA and is attributed to the phase separation between the conjugated polymers. Finally, the narrow band gap conjugated polymer, poly[bis(3,4-propylenedioxythiophene-dihexyl)]-cyanovinylene has been characterized for its electrochromic properties, illustrating the multifunctional nature of variable band gap conjugated polymers.

Narrow band gap conjugated polymers for emergent optoelectronic technologies

2015 ◽  
Author(s):  
Jason D. Azoulay ◽  
Benjamin A. Zhang ◽  
Alexander E. London
Keyword(s):  
Conjugated Polymers ◽  
Band Gap ◽  
Narrow Band

Structural and electronic properties of narrow-band-gap semiconductors: InP, InAs, and InSb

1990 ◽  
Vol 41 (17) ◽  
pp. 12079-12085 ◽  
Author(s):  
S. Massidda ◽  
A. Continenza ◽  
A. J. Freeman ◽  
T. M. de Pascale ◽  
F. Meloni ◽  
...  
Keyword(s):  
Band Gap ◽  
Electronic Properties ◽  
Narrow Band ◽  
Structural And Electronic Properties ◽  
Narrow Band Gap Semiconductors

Narrow-Band-Gap Conjugated Polymers Based on 2,7-Dioctyl-Substituted Dibenzo[a,c]phenazine Derivatives for Polymer Solar Cells

2014 ◽  
Vol 47 (9) ◽  
pp. 2921-2928 ◽  
Author(s):  
Ruifeng He ◽  
Lei Yu ◽  
Ping Cai ◽  
Feng Peng ◽  
Jin Xu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
Band Gap ◽  
Narrow Band ◽  
Polymer Solar Cells

Inducing planarity in redox-active conjugated polymers with solubilizing 3,6-dialkoxy-thieno[3,2-b]thiophenes (DOTTs) for redox and solid-state conductivity applications

2020 ◽  
Vol 8 (22) ◽  
pp. 7463-7475 ◽  
Author(s):  
Sandra L. Pittelli ◽  
Shawn A. Gregory ◽  
James F. Ponder ◽  
Shannon K. Yee ◽  
John R. Reynolds
Keyword(s):  
Solid State ◽  
Conjugated Polymers ◽  
Electronic Properties ◽  
New Family ◽  
Redox Active ◽  
Optical And Electronic Properties

A new family of redox-active dioxythienothiophene (DOTT) polymers are studied for their solid state ordering and doping susceptibility, along with their optical and electronic properties.

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