Determining the structural motif of P3HT:PCBM nanoparticulate organic photovoltaic devices

Ulum, Syahrul; Holmes, Natalie P.; Darwis, Darmawati; Burke, Kerry B.; Kilcoyne, A. L. D.; Zhou, Xiaojing; Belcher, Warwick J.; Dastoor, Paul C.

doi:10.1016/j.solmat.2012.11.015

Cited by 79 publications

(132 citation statements)

References 28 publications

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“…As discussed elsewhere [25], particles of two size ranges were prepared for device characterization and scanning transmission X-ray microscopy (STXM) measurements by varying the amount of surfactant added to the emulsion. Fig.…”

Section: Resultsmentioning

confidence: 99%

The effect of mesomorphology upon the performance of nanoparticulate organic photovoltaic devices

Dam

Holmes

Andersen

et al. 2015

Solar Energy Materials and Solar Cells

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a b s t r a c tScanning transmission X-ray microscopy (STXM) compositional mapping has been used to probe the mesomorphology of nanoparticles (NPs) synthesized from two very different polymer:fullerene blends: poly(3-hexylthiophene) (P3HT): phenyl-C61-butyric acid methyl ester (PCBM) and poly[4,8-bis(2-ethylhexyloxy)benzo(1,2-b:4,5-b′)dithiophene-alt-5, 6-bis(octyloxy)-4,7-di(thiophen-2-yl)(2,1,3-benzothiadiazole)-5,5′-diyl] (PSBTBT): PCBM. The STXM data shows that both blends form core-shell NP structures with similar shell compositions, but with different polymer:fullerene ratios in the core regions. P3HT:PCBM and PSBTBT:PCBM NP organic photovoltaic (OPV) devices have been fabricated and exhibit similar device efficiencies, despite the PSBTBT being a much higher performing low band gap material. By comparing the measured NP shell and core compositions with the optimized bulk heterojunction (BHJ) compositions, we show that the relatively higher performance of the P3HT:PCBM NP device arises from the fact that its shell composition is much closer to the optimal BHJ value than that of the PSBTBT:PCBM NP device.Crown

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Section: Resultsmentioning

confidence: 99%

The effect of mesomorphology upon the performance of nanoparticulate organic photovoltaic devices

Dam

Holmes

Andersen

et al. 2015

Solar Energy Materials and Solar Cells

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“…6d) indicates an increase in crystallinity of polymer domains or a higher degree of phase separation, generated by PC 71 BM diffusion from amorphous PTNT-rich domains, resulting in lower PL quenching of PTNT emission upon annealing. 33,59 It must be …”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…49 The gross phase separation deteriorated the NP film morphology, which is detrimental for the device performance of NP solar devices. 33,43,50 Thus, precise control over the thermal annealing temperature is crucial to achieve a homogenous active layer in OPVs as well as removing the moisture and avoiding large phase separation. 37 Similar behaviour was also found in the case of NP-xylene films, when annealed at different temperatures ( Fig.…”

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confidence: 99%

Environmentally friendly preparation of nanoparticles for organic photovoltaics

Pan

Sharma

Gedefaw

et al. 2018

Organic Electronics

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Aqueous nanoparticle dispersions were prepared from a conjugated polymer poly(2,5-thiophene-alt-4,9-bis(2-hexyldecyl)-4,9-dihydrodithieno[3,2-c:3',2'-h][1,5]naphthyridine-5,10-dione) (PTNT) and fullerene blend utilizing chloroform as well as a non-chlorinated and environmentally benign solvent, o-xylene, as the miniemulsion dispersed phase solvent. The nanoparticles (NPs) in the solid-state film were found to coalesce and offered a smooth surface topography upon thermal annealing. Organic photovoltaics (OPVs) with photoactive layer processed from the nanoparticle dispersions prepared using chloroform as the miniemulsion dispersed phase solvent were found to have a power conversion efficiency M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT2 (PCE) of 1.04%, which increased to 1.65% for devices utilizing NPs prepared from o-xylene.Physical, thermal and optical properties of NPs prepared using both chloroform and o-xylene were systematically studied using dynamic mechanical thermal analysis (DMTA) and photoluminescence (PL) spectroscopy and correlated to their photovoltaic properties. The PL results indicate different morphology of NPs in the solid state were achieved by varying miniemulsion dispersed phase solvent.

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“…6,7 However, if nanoparticulate dispersions are to become more readily adopted for active layer production, they will need to preserve device performance stability whilst maintaining suitability for large area coating techniques such as reel-to-reel printing. Nanoparticulate device performance is improved by the addition of a thin calcium layer between the active layer and aluminium cathode, 8,9 consistent with the improvement that occurs in standard bulk heterojunction (BHJ) devices. 10,11 However, the use of Ca layers with water-dispersed NPs in printed devices is problematic, since the instability of Ca to retained water is likely to limit its applicability in commercial scale organic solar cell production.…”

Section: Solution Processable Interface Materials For Nanoparticulatementioning

confidence: 53%

Solution processable interface materials for nanoparticulate organic photovoltaic devices

Nicolaidis

Vaughan

Mulligan

et al. 2014

Applied Physics Letters

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Determining the structural motif of P3HT:PCBM nanoparticulate organic photovoltaic devices

Cited by 79 publications

References 28 publications

The effect of mesomorphology upon the performance of nanoparticulate organic photovoltaic devices

The effect of mesomorphology upon the performance of nanoparticulate organic photovoltaic devices

Environmentally friendly preparation of nanoparticles for organic photovoltaics

Solution processable interface materials for nanoparticulate organic photovoltaic devices

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