A Conjugated Polymer for Near Infrared Optoelectronic Applications

Perzon, Erik; Zhang, Fengling; Andersson, Lars M; Mammo, Wendimagegn; Inganäs, Olle; Andersson, Mats R.

doi:10.1002/adma.200700557

Cited by 160 publications

(135 citation statements)

References 23 publications

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“…1b shows the absorption and PL spectra of a drop-casted LBPP-1 film on glass (black lines). There is an absorption maximum at 954 nm, similar to the values reported previously [8], while the emission maximum is lying at 1140 nm. Both spectra are featureless, with the emission spectrum red shifted by 186 nm.…”

Section: Methodssupporting

confidence: 89%

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Fluorescence light emission at 1eV from a conjugated polymer

Tzamalis¹,

Lemaur²,

Karlsson³

et al. 2010

Chemical Physics Letters

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Section: Methodssupporting

confidence: 89%

“…The synthetic route towards this low bandgap polymer has been described in details elsewhere [8]. LBPP-1 films were drop casted on glass substrates from a solution of LBPP-1 in chloroform (5 mg/ml).…”

Section: Methodsmentioning

confidence: 99%

Fluorescence light emission at 1eV from a conjugated polymer

Tzamalis¹,

Lemaur²,

Karlsson³

et al. 2010

Chemical Physics Letters

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“…So it is necessary to increase the spectral overlap, namely, reduce the band gap of p-conjugation polymers. Therefore, many efforts have been made toward conjugation polymers with reduced band gaps [6][7][8][9][10].…”

mentioning

confidence: 99%

First principles investigation on the key factors of broad absorption spectra and electronic properties for oligothiophene and its derivatives for solar cells

Tang

Zhang

2011

Int J of Quantum Chemistry

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On the basis of optimized structures of two kinds thiophene oligomers, we investigated the configuration and conformation dependent optical and electronic properties of a or b substituted oligothiophene (PT) and oligo(thienylenevinylene) (PTV) isomers, respectively, at the TD-DFT/6-31þG(d,p)//PBE0/6-31G(d) level. The corresponding properties of polymers were predicted by extrapolation method. The broad absorption regions for polythiophene and/or poly(thienylenevinylene) can be ascribed to the coexistence of various conformational and/or configurational isomers with similar energies and each corresponding excited state possessing different absorption spectrum and overlapping each other. Furthermore, the reorganization energies for electron (k e ) and hole (k h ) of a or b substituted PTV and PT indicate them to be potential ambipolar charge transport materials under the proper operating conditions. Therefore, these results are important because they can provide a rational way for the design of multifunctional materials with broad absorption and ambipolar charge transport properties for solar cells devices.

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“…[1][2][3][4] Applications include lightemitting diodes (OLEDs), [5][6][7][8][9][10] eld effect transistors (OFETs), [11][12][13][14][15] lasers, [16][17][18][19][20] photodetectors, [21][22][23][24][25] sensors, [26][27][28][29] and organic photovoltaic (OPV) devices. [30][31][32][33][34] Functioning is oen based on processes that occur in the excited state, populated for example by optical absorption or electrical stimulus.…”

Section: Introductionmentioning

confidence: 99%

Sub-picosecond delocalization in the excited state of conjugated homopolymers and donor–acceptor copolymers

2013

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In this feature article, we review and examine evidence that the primary photoexcited species in conjugated polymers is considerably delocalized. Localization occurs via a series of complex relaxation mechanisms on the <200 femtosecond time scale. We show that short-lived delocalization in the neutral excited state and charge separated state of bulk heterojunction blends might play an essential role in ensuring efficient formation of free charge carriers for photovoltaic applications. Finally, the additional parameter of intramolecular charge transfer character in the excited state of more recently developed donor-acceptor copolymers is discussed. Both delocalization and partial charge transfer reduce the binding of the electron and hole in photoexcited organic semiconductors and can help to overcome the bottleneck to macroscopic current generation in polymer solar cells.

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A Conjugated Polymer for Near Infrared Optoelectronic Applications

Cited by 160 publications

References 23 publications

Fluorescence light emission at 1eV from a conjugated polymer

Fluorescence light emission at 1eV from a conjugated polymer

First principles investigation on the key factors of broad absorption spectra and electronic properties for oligothiophene and its derivatives for solar cells

Sub-picosecond delocalization in the excited state of conjugated homopolymers and donor–acceptor copolymers

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