UV irradiation induced conductivity improvement in poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) film

Xing, Yingjie; Qian, Min-Fang; Wang, Guiwei; Zhang, Gengmin; Guo, Dengzhu; Jin-Lei, Wu

doi:10.1007/s11431-013-5426-8

Cited by 20 publications

(15 citation statements)

References 15 publications

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“…PEDOT:PSS represents the next-generation of electrodes because of its high transparency in the visible range, its solution processability, its high work function, and its significant mechanical flexibility. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] With the widespread use of PEDOT:PSS, a number of studies are attempting to determine and improve its properties. A common method that is used to improve the properties of PEDOT:PSS is a chemical treatment that involves the addition of co-solvents, which results in considerable improvement to the polymer's conductivity.…”

Section: Introductionmentioning

confidence: 99%

Effect of incorporation of ethylene glycol into PEDOT:PSS on electron phonon coupling and conductivity

Lin,

Ni,

Lee

2015

Journal of Applied Physics

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The effect of incorporation of ethylene glycol (EG) into poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) on electron phonon coupling and conductivity is investigated. It is shown that the carrier density (NC) increases significantly and the carrier mobility (μ) increases slightly at 300 K. The increased intensity of the Raman spectrum between 1400 and 1450 cm−1, following EG treatment (that is, the quinoid-dominated structures of the PEDOT chain), leads to an increase in the number of polarons (bipolarons), which leads to an increase in NC. In addition, μ in PEDOT:PSS samples with or without EG addition exhibits a strong temperature dependence, which demonstrates the dominance of tunneling (hopping) at low (high) temperatures. The high conductivity of PEDOT:PSS samples with the addition of EG is attributed to the combined effect of the modification of the electron-phonon coupling and the increase in NC (μ).

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Section: Introductionmentioning

confidence: 99%

Effect of incorporation of ethylene glycol into PEDOT:PSS on electron phonon coupling and conductivity

Lin,

Ni,

Lee

2015

Journal of Applied Physics

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“…[46][47][48] However, in most of the publications the UV treatments were performed in air or by applying UV-ozone. Xing et al 49 describe a simple method to increase the conductivity of the PEDOT:PSS film by exposure to UV light in a vacuum. They have found that the main role of UV light is to decompose the chemical bonds in the PEDOT:PSS, resulting in a decrease of conductivity, while the ozone and atomic oxygen are absorbed and oxidize the surface, leading to an increase of the work function.…”

Section: View Article Onlinementioning

confidence: 99%

Reversible degradation in ITO-containing organic photovoltaics under concentrated sunlight

Galagan

Mescheloff

Veenstra

et al. 2015

Phys. Chem. Chem. Phys.

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Stabilities of ITO-containing and ITO-free organic solar cells were investigated under simulated AM 1.5G illumination and under concentrated natural sunlight. In both cases ITO-free devices exhibit high stability, while devices containing ITO show degradation of their photovoltaic performance. The accelerated degradation under concentrated sunlight (of up to 20 suns) in ITO-containing devices was found to be reversible. Dark exposure of degraded samples can partly restore performance. A possible underlying mechanism for such a phenomenon is discussed.

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“…The presence of extra, photogenerated charges could enhance the electrical conductivity of materials by increasing the carrier concentration. [40] Then, as the temperature of the material increases, the conductivity decreases, as expected for a metallic conductor. [39] Traditionally, attempts to achieve higher conductivity by doping methods have shown that the corresponding Seebeck coefficient tends to decrease.…”

Section: Thermoelectric Parameter Characterizationmentioning

confidence: 78%

Solar Harvesting: a Unique Opportunity for Organic Thermoelectrics?

Jurado

Dörling

Zapata‐Arteaga

et al. 2019

Advanced Energy Materials

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Thermoelectrics have emerged as a strategy for solar‐to‐electricity conversion, as they can complement photovoltaic devices as IR harvesters or operate as stand‐alone systems often under strong light and heat concentration. Inspired by the recent success of inorganic‐based solar thermoelectric generators (STEGs), in this manuscript, the potential of benchmark organic thermoelectric materials for solar harvesting is evaluated. It is shown that the inherent properties of organic semiconductors allow the possibility of fabricating organic STEGs (SOTEGs) of extraordinary simplicity. The broadband light absorption exhibited by most organic thermoelectrics combined with their low thermal conductivities results in a significant temperature rise upon illumination as seen by IR thermography. Under 2 sun illumination, a temperature difference of 50 K establishes between the illuminated and the non‐illuminated sides of a poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) film, and ≈40 K for a carbon nanotube/cellulose composite. Moreover, when using light as a heat source, the Seebeck coefficient remains unaffected, while a small photoconductivity effect is observed in PEDOT:PSS and carbon nanotubes. Then, the effect of several geometrical factors on the power output of a solar organic thermoelectric generator is investigated, enabling us to propose simple SOTEG geometries that capitalize on the planar geometry typical of solution‐processable materials. Finally, a proof‐of‐concept SOTEG is demonstrated, generating 180 nW under 2 suns.

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UV irradiation induced conductivity improvement in poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) film

Cited by 20 publications

References 15 publications

Effect of incorporation of ethylene glycol into PEDOT:PSS on electron phonon coupling and conductivity

Effect of incorporation of ethylene glycol into PEDOT:PSS on electron phonon coupling and conductivity

Reversible degradation in ITO-containing organic photovoltaics under concentrated sunlight

Solar Harvesting: a Unique Opportunity for Organic Thermoelectrics?

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