Thermal and optical properties of nano/micro single crystals and nanofibers obtained from semiconductive-dielectric poly(3-hexylthiophene) block copolymers

Zenoozi, Sahar; Agbolaghi, Samira; Nazari, Maryam

doi:10.1016/j.mssp.2017.03.015

Cited by 18 publications

(13 citation statements)

References 89 publications

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“…Among the conjugated polymers, regioregular P3HT (RR‐P3HT), thanks to appropriate processability and electrical properties, good function and a marked tendency to develop nanostructured crystals, is one of the attractive materials in electronic devices . The manipulation of the physical, thermal and optical characteristics of P3HT based systems and their application in photovoltaic cells has been reported in the literature. In organic solar cells, block copolymer compatibilizers were utilized to tune the active layer morphology .…”

Section: Introductionmentioning

confidence: 99%

Efficiency above 6% in poly(3‐hexylthiophene):phenyl‐C‐butyric acid methyl ester photovoltaics via simultaneous addition of poly(3‐hexylthiophene) based grafted graphene nanosheets and hydrophobic block copolymers

Mohammadi‐Arbati

Agbolaghi

2019

Polymer International

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A combination of reduced graphene oxide (rGO) nanosheets grafted with regioregular poly(3-hexylthiophene) (P3HT) (rGO-g-P3HT) and P3HT-b-polystyrene (PS) block copolymers was utilized to modify the morphology of P3HT:[6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) active layers in photovoltaic devices. Efficiencies greater than 6% were acquired after a mild thermal annealing. To this end, the assembling of P3HT homopolymers and P3HT-b-PS block copolymers onto rGO-g-P3HT nanosheets was investigated, showing that the copolymers were assembled from the P3HT side onto the rGO-g-P3HT nanosheets. Assembling of P3HT-b-PS block copolymers onto the rGO-g-P3HT nanosheets developed the net hole and electron highways for charge transport, thereby in addition to photoluminescence quenching the charge mobility ( h and e ) values increased considerably. The best charge mobilities were acquired for the P3HT 50000 :PC71BM:rGO-g-P3HT 50000 :P3HT 7000 -b-PS 1000 system ( h = 1.9 × 10 −5 cm 2 V -1 s -1 and e = 0.8 × 10 −4 cm 2 V -1 s -1 ). Thermal annealing conducted at 120 ∘ C also further increased the hole and electron mobilities to 9.8 × 10 −4 and 2.7 × 10 −3 cm 2 V -1 s -1 , respectively. The thermal annealing acted as a driving force for better assembly of the P3HT-b-PS copolymers onto the rGO-g-P3HT nanosheets. This phenomenon improved the short circuit current density, fill factor, open circuit voltage and power conversion efficiency parameters from 11.13 mA cm −2 , 0.63 V, 62% and 4.35% to 12.98 mA cm −2 , 0.69 V, 68% and 6.09%, respectively. RESULTS AND DISCUSSION Synthesis P3HT homopolymerFourier transform IR (FTIR) spectra of P3HT-Br and 1 H NMR spectra of P3HT 7000 and P3HT 50000 are shown in Figs S1(a)-S1(c), Polym Int 2019; 68: 1292-1302

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Section: Introductionmentioning

confidence: 99%

Efficiency above 6% in poly(3‐hexylthiophene):phenyl‐C‐butyric acid methyl ester photovoltaics via simultaneous addition of poly(3‐hexylthiophene) based grafted graphene nanosheets and hydrophobic block copolymers

Mohammadi‐Arbati

Agbolaghi

2019

Polymer International

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“…For interpreting the functional behavior of conjugated crystalline structures, it is necessary to unravel the relationship between thermal and optical properties and ordered structures . In recent years, the crystallization of conjugated polymers has been thoroughly investigated on carbonic materials such as carbon nanotubes (CNTs) and graphene nanosheets.…”

Section: Introductionmentioning

confidence: 99%

Pure and complex nanostructures using poly[bis(triiso‐propylsilylethynyl) benzodithiophene‐bis(decyltetradecyl‐thien) naphthobisthiadiazole], carbon nanotubes and reduced graphene oxide for high‐performance polymer solar cells

Agbolaghi

2019

Polymer International

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Crystallization of poly[bis(triiso‐propylsilylethynyl) benzodithiophene‐bis(decyltetradecyl‐thien) naphthobisthiadiazole] (PBDT‐TIPS‐DTNT‐DT) was investigated in supramolecules based on carbon nanotubes (CNTs) and reduced graphene oxide (rGO) and their grafted derivatives. The principal peaks of PBDT‐TIPS‐DTNT‐DT crystals were in the range 3.50°–3.75°. By grafting the surface of the carbonic materials, the assembling of polymer chains decreased because of hindrance of poly(3‐dodecylthiophene) (PDDT) grafts against π‐stacking. The diameters of CNT/polymer and CNT‐g‐PDDT/polymer supramolecules were 160 and 100 nm. The rGO/polymer supramolecules had the highest melting point (Tm = 282 °C) and fusion enthalpy (ΔHm = 25.98 J g−1), reflecting the largest crystallites and the most ordered constituents. Nano‐hybrids based on grafted rGO (276 °C and 28.26 J g−1), CNT (275 °C and 27.32 J g−1) and grafted CNT (268 °C and 22.17 J g−1) were also analyzed. Tm and ΔHm values were significantly less in corresponding melt‐grown systems. The nanostructures were incorporated in active layers of PBDT‐TIPS‐DTNT‐DT:phenyl‐C71‐butyric acid methyl ester (PC71BM) solar cells to improve the photovoltaic features. The best results were detected for PBDT‐TIPS‐DTNT‐DT:PC71BM:rGO/polymer systems having Jsc = 13.11 mA cm−2, fill factor 60% and Voc = 0.71 V with an efficacy of 5.58%. On grafting the rGO and CNT, efficiency reductions were 12.01% (5.58%–4.91%) and 9.34% (4.07%–3.69%), respectively. © 2019 Society of Chemical Industry

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confidence: 99%

“…Conjugated semiconducting polymers have been extensively investigated owing to their technological advancements that range from biomedical applications to solar energy conversion, charge transport and storage . These materials have emerged with the promise for cleaner and cost‐effective manipulation while maintaining relatively high carrier mobilities . Significant improvements in the performance of organic semiconductors have been achieved over the past two decades through the design of new molecular structures and preparation methods .…”

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confidence: 99%

“…These materials have emerged with the promise for cleaner and cost‐effective manipulation while maintaining relatively high carrier mobilities . Significant improvements in the performance of organic semiconductors have been achieved over the past two decades through the design of new molecular structures and preparation methods . The natural tendency of these conjugated polymers to self‐organize into ordered aggregates results in crystalline domains embedded in an amorphous environment that were shown to control the overall electrical and optical properties of these materials …”

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Photoinduced Self‐Assembled Nanostructures and Permanent Polaron Formation in Regioregular Poly(3‐hexylthiophene)

et al. 2018

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Solution processing of conjugated polymers into ordered self-assembled precursors has attracted great interest in the past years owing to the ability to manipulate their structural and physical properties. Regioregular poly(3-hexylthiophene) (P3HT) has become the benchmark polymer in this scenario, where ordered lamellar structures significantly improve carrier mobility of the thin films due to increased crystallinity, extended intrachain conjugation, and ordered interchain π-stacking. Here, a new photoinduced approach is presented for the generation of highly ordered P3HT aggregate structures that is amenable to the use of visible light to control the aggregate formation. Strong intra- and interchain interactions in the solution precursors allow for permanent formation of localized and delocalized polarons that are stable for months. Spin-coated thin films are found to preserve, in part, the morphological and physical properties of the aggregated P3HT solution precursors with high degree of crystallinity and short π-stack interchain distances.

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Thermal and optical properties of nano/micro single crystals and nanofibers obtained from semiconductive-dielectric poly(3-hexylthiophene) block copolymers

Cited by 18 publications

References 89 publications

Efficiency above 6% in poly(3‐hexylthiophene):phenyl‐C‐butyric acid methyl ester photovoltaics via simultaneous addition of poly(3‐hexylthiophene) based grafted graphene nanosheets and hydrophobic block copolymers

Efficiency above 6% in poly(3‐hexylthiophene):phenyl‐C‐butyric acid methyl ester photovoltaics via simultaneous addition of poly(3‐hexylthiophene) based grafted graphene nanosheets and hydrophobic block copolymers

Pure and complex nanostructures using poly[bis(triiso‐propylsilylethynyl) benzodithiophene‐bis(decyltetradecyl‐thien) naphthobisthiadiazole], carbon nanotubes and reduced graphene oxide for high‐performance polymer solar cells

Photoinduced Self‐Assembled Nanostructures and Permanent Polaron Formation in Regioregular Poly(3‐hexylthiophene)

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