Thienopyrazine-based low-bandgap polymers for flexible polymer solar cells

Sensfuß, Steffi; Blankenburg, Lars; Schache, Hannes; Shokhovets, S.; Erb, Tobias; Konkin, A. A.; Herasimovich, A.; Scheinert, S.; Shahid, Munazza; Sell, Stephan; Klemm, Elisabeth

doi:10.1051/epjap/2010103

Cited by 6 publications

(4 citation statements)

References 20 publications

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“…The E gd and E gi values of MDMO-PPV–DMP thin film were found to be 2.18 eV and 2.06 eV, respectively. These obtained band gaps of MDMO-PPV–DMP are in agreement with previous reports [ 22 , 23 ]. These values of both E gd and E gi were dramatically reduced upon increment of ZnO NPs to reach 2.03 eV and 1.89 eV, respectively.…”

Section: Resultssupporting

confidence: 93%

Photophysical Characteristics of Multicolor Emitting MDMO-PPV–DMP/ZnO Hybrid Nanocomposites

2022

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The tuning of photophysical properties of the poly[2-methoxy-5-(3,7-dimethyl-octyloxy)-1,4-phenylenevinylene]—end capped with dimethylphenyl (DMP), MDMO-PPV–DMP, was achieved by incorporation of ZnO NPs with various contents. Hybrid nanocomposites of MDMO-PPV–DMP with ZnO NPs were prepared by solution blending method and then deposited onto glass substrates. The structural properties of the hybrid nanocomposites samples were characterized using X-ray diffraction, FTIR, and FE-SEM, while their optical properties were extracted from the absorption and photoluminescence spectra. The energy band gap, energy tail, steepness parameter, and CIE chromatic coordinates were tuned by increase the content of ZnO NPs into the polymer matrix. The ZnO NPs incorporation assists the emission wavelength shift and multicolor emitting from the hybrid nanocomposites.

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Section: Resultssupporting

confidence: 93%

Photophysical Characteristics of Multicolor Emitting MDMO-PPV–DMP/ZnO Hybrid Nanocomposites

2022

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“…•− anion radical exceeds g e . 13,20 This is in agreement with the study of respective anion radicals in crystalline (g iso = 2.0047) 21,22 and dissolved 22,23 C 70 . Such an effect has been supposed 24 to appear due to different Jahn−Teller dynamics of C 60 and C 70 molecules, which might contribute to different signs of the g-value shifts.…”

Section: ■ Results and Discussionsupporting

confidence: 90%

“…It is evident from the figure that the spectra of both charge carriers are fitted well by those calculated with the above obtained g -tensor terms. These values lie near those determined at higher spectral resolution. , If the effective g -factor of different F 61 •– anion radicals is normally less than the g -factor of the free electron, ,,, ( g e = 2.00232), the g iso value of the m F 71 •– anion radical exceeds g e . , This is in agreement with the study of respective anion radicals in crystalline ( g iso = 2.0047) , and dissolved , C 70 . Such an effect has been supposed to appear due to different Jahn–Teller dynamics of C 60 and C 70 molecules, which might contribute to different signs of the g -value shifts.…”

Section: Resultssupporting

confidence: 86%

Light-Induced EPR Study of Charge Transfer in P3HT/PC₇₁BM Bulk Heterojunctions

Krinichnyi

Yudanova

2012

J. Phys. Chem. C

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Radical pairs, polarons, and fullerene anion radicals photoinduced by photons with energy of 1.98–2.73 eV in bulk heterojunctions formed by regioregular poly(3-hexylthiophene) (P3HT) with (6,6)-phenyl-C71-butyric acid ester (PC71BM) methanofullerene have been studied by the direct light-induced EPR (LEPR) method at a wide temperature region. LEPR spectra of the P3HT/PC71BM composite were deconvoluted, and the main magnetic resonance parameters of these charge carriers have been determined. A part of photoinduced polarons is pinned by large-depth traps in the polymer matrix. It was shown that magnetic resonance, relaxation, and dynamics parameters of photoinduced charge carriers depend extremely on the energy of initiated photons. Relaxation and dynamics parameters of both the charge carriers were determined separately by the steady-state saturation method. Longitudinal diffusion of polarons was analyzed in terms of spin interaction with the lattice phonons of crystalline domains embedded into an amorphous polymer matrix. The interchain spin hopping is determined by the number and depth of the traps photoinitiated in the polymer matrix. Pseudorotation of methanofullerene molecules in a polymer matrix was shown to follow the activation Pike model. The replacement in the composite of PC61BM acceptors by PC71BM ones accelerates electron relaxation, hinders the formation of spin traps, and favors more ordered (crystalline) structure of bulk heterojunction that facilitates charge transfer in the P3HT/PC71BM composite.

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“…Thus, hybrid thin films based on functionalized PPV (amines or pentafluorophenyl esters as side chains) and inorganic nanocrystals were fabricated by a layer-by-layer approach and their photovoltaic properties were investigated [ 129 ]. MEH-PPV characterized by a band gap of ~2.2 eV [ 130 ], a HOMO energy level at 5.3 eV [ 126 ] and a high hole mobility [ 131 ] and MDMO-PPV featured by a band gap of ~2.2 eV ([ 132 ] are the PPV derivate most commonly integrated in the OPV and HPV cells [ 132 , 133 ].…”

Section: Organic Compounds and Inorganic Nanostructures—materials For Designing Pv Cellsmentioning

confidence: 99%

Hybrid Nanocomposite Thin Films for Photovoltaic Applications: A Review

Socol

Preda

2021

Nanomaterials

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Continuing growth in global energy consumption and the growing concerns regarding climate change and environmental pollution are the strongest drivers of renewable energy deployment. Solar energy is the most abundant and cleanest renewable energy source available. Nowadays, photovoltaic technologies can be regarded as viable pathways to provide sustainable energy generation, the achievement attained in designing nanomaterials with tunable properties and the progress made in the production processes having a major impact in their development. Solar cells involving hybrid nanocomposite layers have, lately, received extensive research attention due to the possibility to combine the advantages derived from the properties of both components: flexibility and processability from the organic part and stability and optoelectronics features from the inorganic part. Thus, this review provides a synopsis on hybrid solar cells developed in the last decade which involve composite layers deposited by spin-coating, the most used deposition method, and matrix-assisted pulsed laser evaporation, a relatively new deposition technique. The overview is focused on the hybrid nanocomposite films that can use conducting polymers and metal phthalocyanines as p-type materials, fullerene derivatives and non-fullerene compounds as n-type materials, and semiconductor nanostructures based on metal oxide, chalcogenides, and silicon. A survey regarding the influence of various factors on the hybrid solar cell efficiency is given in order to identify new strategies for enhancing the device performance in the upcoming years.

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Thienopyrazine-based low-bandgap polymers for flexible polymer solar cells

Cited by 6 publications

References 20 publications

Photophysical Characteristics of Multicolor Emitting MDMO-PPV–DMP/ZnO Hybrid Nanocomposites

Photophysical Characteristics of Multicolor Emitting MDMO-PPV–DMP/ZnO Hybrid Nanocomposites

Light-Induced EPR Study of Charge Transfer in P3HT/PC₇₁BM Bulk Heterojunctions

Hybrid Nanocomposite Thin Films for Photovoltaic Applications: A Review

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Thienopyrazine-based low-bandgap polymers for flexible polymer solar cells

Cited by 6 publications

References 20 publications

Photophysical Characteristics of Multicolor Emitting MDMO-PPV–DMP/ZnO Hybrid Nanocomposites

Photophysical Characteristics of Multicolor Emitting MDMO-PPV–DMP/ZnO Hybrid Nanocomposites

Light-Induced EPR Study of Charge Transfer in P3HT/PC71BM Bulk Heterojunctions

Hybrid Nanocomposite Thin Films for Photovoltaic Applications: A Review

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Product

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Light-Induced EPR Study of Charge Transfer in P3HT/PC₇₁BM Bulk Heterojunctions