Vertical Phase Separation in Poly(3‐hexylthiophene): Fullerene Derivative Blends and its Advantage for Inverted Structure Solar Cells

Xu, Zheng; Chen, Li Min; Yang, Guan‐Wen; Huang, Chen‐Hung; Hou, Jianhui; Wu, Yue; Li, Gang; Hsu, Chain‐Shu; Yang, Yang

doi:10.1002/adfm.200801286

Cited by 661 publications

(618 citation statements)

References 38 publications

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“…The slight reduction of performance could be explained by the effects of different morphology and phase separation conditions of OSCs with different structures. 46,47 As demonstrated in Supplementary Figs. S8 and S9, the good J dark -V and incident photon-to-current conversion efficiency characteristics of OSCs using Cs-intercalated and pristine metal oxides yield efficient performance with various structures of OSCs.…”

Section: Pbdtdttt-s-t-based Normal and Inverted Oscsmentioning

confidence: 80%

MoOx and V2Ox as hole and electron transport layers through functionalized intercalation in normal and inverted organic optoelectronic devices

et al. 2015

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To achieve fabrication and cost competitiveness in organic optoelectronic devices that include organic solar cells (OSCs) and organic light-emitting diodes (OLEDs), it is desirable to have one type of material that can simultaneously function as both the electron and hole transport layers (ETLs and HTLs) of the organic devices in all device architectures (i.e., normal and inverted architectures). We address this issue by proposing and demonstrating Cs-intercalated metal oxides (with various Cs mole ratios) as both the ETL and HTL of an organic optoelectronic device with normal and inverted device architectures. Our results demonstrate that the new approach works well for widely used transition metal oxides of molybdenum oxide (MoO x ) and vanadium oxide (V 2 O x ). Moreover, the Cs-intercalated metaloxide-based ETL and HTL can be easily formed under the conditions of a room temperature, water-free and solution-based process. These conditions favor practical applications of OSCs and OLEDs. Notably, with the analyses of the Kelvin Probe System, our approach of Cs-intercalated metal oxides with a wide mole ratio range of transition metals (Mo or V)/Cs from 1 : 0 to 1 : 0.75 can offer significant and continuous work function tuning as large as 1.31 eV for functioning as both an ETL and HTL. Consequently, our method of intercalated metal oxides can contribute to the emerging large-scale and low-cost organic optoelectronic devices.

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Section: Pbdtdttt-s-t-based Normal and Inverted Oscsmentioning

confidence: 80%

MoOx and V2Ox as hole and electron transport layers through functionalized intercalation in normal and inverted organic optoelectronic devices

et al. 2015

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“…We note that, whilst both having a predominantly hydrophilic character, the surface energies of the spectrosil substrates used for optical measurements may be somewhat different from the PEDOT:PSSplanarised substrates used for device work. [15] Whilst the observed top-surface morphologies do not change qualitatively, it is possible that the blend composition and morphology at the substrate is modified, [19,20] with commensurate effects on the orientation of the pery-PIC/PDI chromophores in the interfacial layer.…”

Section: Experimental Procedures and Background Theorymentioning

confidence: 99%

Photophysical studies of poly-isocyanopeptide based photovoltaic blends

Finlayson¹,

Whitney²

2010

J. Phys. D: Appl. Phys.

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We report a photophysical study of photovoltaic blends containing perylene-substituted polyisocyanide (pery-PIC) materials, using time-correlated single photon counting (TCSPC) and photo-induced absorption spectroscopy, and compare the key characteristics to analogous perylene-diimide (PDI) monomer blends with polythiophene-and polyfluorene-based conjugated polymers. Pery-PIC consists of semiconducting perylene units, which self-stack in a regular fashion around a rigid helical poly-isocyanopeptide backbone. In particular, the charged state lifetimes in pery-PIC blends are found to be of order 10s of μs; this being typically less than half those of the perylene-anion in the corresponding PDI blends. We consider the influence of photophysical factors on the superior photovoltaic device performance of the pery-PIC blends, relative to the corresponding PDI-based devices, in addition to the morphological effects described in earlier studies.

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“…42,[47][48][49][50][51] It should also be noted that the distribution of components normal to the film surface is also dependent on the nature of the solvent used. 52 The interactions between the conjugated polymer, here P3HT, and PCBM, that is, their miscibility, and the solubility of the components in the solvent use for film preparation are important parameters that must be considered in describing and controlling the morphology of the resultant active layer. There is overwhelming evidence that P3HT and PCBM are highly miscible.…”

Section: Thermal Annealing Approachmentioning

confidence: 99%

On the morphology of polymer‐based photovoltaics

Liu

Jung

et al. 2012

J Polym Sci B Polym Phys

308

248

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We review the morphologies of polymer-based solar cells and the parameters that govern the evolution of the morphologies and describe different approaches to achieve the optimum morphology for a BHJ OPV. While there are some distinct differences, there are also some commonalities. It is evident that morphology and the control of the morphology are important for device performance and, by controlling the thermodynamics, in particular, the interactions of the components, and by controlling kinetic parameters, like the rate of solvent evaporation, crystallization and phase separation, optimized morphologies for a given system can be achieved. While much research has focused on P3HT, it is evident that a clearer understanding of the morphology and the evolution of the morphology in low bad gap polymer systems will increase the efficiency further. While current OPVs are on the verge of breaking the 10% barrier, manipulating and controlling the morphology will still be key for device optimization and, equally important, for the fabrication of these devices in an industrial setting.

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Vertical Phase Separation in Poly(3‐hexylthiophene): Fullerene Derivative Blends and its Advantage for Inverted Structure Solar Cells

Cited by 661 publications

References 38 publications

MoOx and V2Ox as hole and electron transport layers through functionalized intercalation in normal and inverted organic optoelectronic devices

MoOx and V2Ox as hole and electron transport layers through functionalized intercalation in normal and inverted organic optoelectronic devices

Photophysical studies of poly-isocyanopeptide based photovoltaic blends

On the morphology of polymer‐based photovoltaics

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