Recent Development in ITO-free Flexible Polymer Solar Cells

In this paper the novel high-temperature resistant polymers with nonlinear optical properties have been synthesized, characterized and tested for use in electro-optical components with high bit rate optical signal processing systems and for dynamic holography. The characterization that has been reported include the measurement of second-order nonlinear susceptibility by second harmonic generation, UV-VIS spectroscopy, XRD measurement dielectric relaxation, glass transition temperature and molecular weight distribution before and after artificial ageing. Also, we have done AFM investigations and profilometry measurements for stamp patterning layers. The application of the new polyimides for electro-optic devices has been evaluated by creation of thin oriented polymer films on various substrates and preparation of planar and strip waveguides.

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“…The first publications concerning polyphenylquinoxalines were published by Stille et al and by Wrasidlo et al [17][18][19][20].…”

Section: Methodsmentioning

confidence: 99%

Investigations of Novel High-Temperature Resistant Polymers for Electro-Optical Applications in Signal Processing Systems

Prelipceanu¹,

Prelipceanu²,

Paraschiv³

et al. 2019

Symmetry

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“…Similar to OLEDs, the basic operation of OSCs also requires at least one transparent electrode, and despite its severe drawbacks, ITO is also still the most common transparent electrode material for the conventional OPVs [105]. Significant progress has been made, however, towards ITO-free high-performance flexible OSCs, and PEDOT:PSS has been among the most investigated alternative electrode materials due to its great potential for the construction of the future soft electronic applications [16].…”

Section: Pedot:pss-based Thin-film Electrodes For Opvsmentioning

confidence: 99%

Rising advancements in the application of PEDOT:PSS as a prosperous transparent and flexible electrode material for solution-processed organic electronics

Huseynova

Kim

Lee

et al. 2019

Journal of Information Display

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An organic conductive polymer, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT: PSS), is an attractive candidate for a low-cost, low-temperature, and solution-processed electrode material for achieving high-performance flexible and stretchable thin-film devices. Unlike most organic materials, this water-soluble conjugated polymer is highly stable against chemical and physical exposure. It exhibits the most superior mechanical flexibility and the highest optical transparency and electrical conductivity among all organic conductors. Therefore, this conductive polymer is among the most promising alternatives to the expensive, rigid, and brittle metal oxide-and even metal-based electrode materials, such as indium tin oxide (ITO) and gold, in the future solutionprocessed electronic devices. Nevertheless, the intrinsic conductivity of PEDOT:PSS is typically below 1 S cm −1 , which is too low for such devices. Fortunately, the material properties of PEDOT:PSS, including its conductivity, are easily tuned by employing a large number of simple approaches. In this paper, the reports on the successful application of PEDOT:PSS to a wide range of solution-processed organic devices, such as organic light-emitting diodes (OLEDs), organic thin-film transistors (OTFTs), and organic photovoltaics (OPVs), are reviewed. The recent progress in the development of highly conductive PEDOT:PSS-based films for electrode applications in the field of organic electronics is the main focus of the discussion herein.

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“…Therefore, replacing ITO transparent electrodes with cheaper alternatives for PSCs is in urgent need in order to meet the requirement for low-cost organic photovoltaic devices. In recent years, tremendous efforts have been shifted to many emerging transparent electrode materials, including conducting oxides [8], metal nanowires [9,10], metal grids [11]and thin metal films (TMFs) [12,13]. Among a great variety of novel TMFs, Ag is the most widely used metal, with excellent optical and electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient, ITO-Free Polymer Solar Cells Using Ultrathin Copper Film as Transparent Electrode

Liang¹,

Luo²,

Cheng³

et al. 2019

Preprint

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Here we report highly efficient, indium tin oxide (ITO)-free polymer solar cells (PSCs) with an ultrathin copper (Cu) film(~10 nm) coated with a thin layer of poly[(9,9-bis(3‘-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)] (PFN) as transparent electrode. Despite of its lower far-field transmittance of the electrode, the obtained ITO-free device based on the ultrathin Cu film can delivery higher absorption efficiency than that of the device based on ITO substrate in the long wavelength region, which can be attributed to the formation of metal resonant microcavity between the opaque back metal mirror (MoO3/Al electrode) and the transparent Cu film with high reflectance. As a result, polymer solar cells based on poly[[2,6'-4,8-di(5-ethylhexylthienyl)benzo[1,2-b;3,3-b]dithiophene][3-fluoro-2[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]] (PTB7-Th) and [6,6]-phenyl C71-butyric acid methyl ester (PC71BM) blend show a high power conversion efficiency (PCE) of 8.21 %, comparable to that of the control device based on ITO electrode (with a PCE of 9.60% ). The results demonstrate that thermally evaporated Cu thin film electrode can be promising candidate to replace ITO for highly efficient PSCs, thus may open up the possibility for massive production of PSCs with low cost.

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Recent Development in ITO-free Flexible Polymer Solar Cells

Cited by 60 publications

References 151 publications

Investigations of Novel High-Temperature Resistant Polymers for Electro-Optical Applications in Signal Processing Systems

Investigations of Novel High-Temperature Resistant Polymers for Electro-Optical Applications in Signal Processing Systems

Rising advancements in the application of PEDOT:PSS as a prosperous transparent and flexible electrode material for solution-processed organic electronics

Highly Efficient, ITO-Free Polymer Solar Cells Using Ultrathin Copper Film as Transparent Electrode

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