Enhanced electroluminescent efficiency with ionic liquid doped into PEDOT:PSS hole-injecting layer

Liu, Yingliang; Zhao, Yüe; Xu, Shengang; Cao, Shaokui

doi:10.1016/j.polymer.2015.09.014

Cited by 8 publications

(9 citation statements)

References 36 publications

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“…Additionally, the two smaller peaks at 165.01 eV (S 2p 1/2 ) and 163.78 (S 2p 3/2 ) can be assigned to the sulfur atoms in the PEDOT fragments. These results are in good agreement with previous reports [32,33]. Figure 4a shows the empty spaces between the PEDOT:PSS-PVP fibers after coating by electrospinning, which would seriously deteriorate the S and σ values of the coating layer.…”

Section: Resultssupporting

confidence: 92%

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Fabrication of PEDOT: PSS-PVP Nanofiber-Embedded Sb2Te3 Thermoelectric Films by Multi-Step Coating and Their Improved Thermoelectric Properties

2020

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Antimony telluride thin films display intrinsic thermoelectric properties at room temperature, although their Seebeck coefficients and electrical conductivities may be unsatisfactory. To address these issues, we designed composite films containing upper and lower Sb2Te3 layers encasing conductive poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS)- polyvinylpyrrolidone(PVP) nanowires. Thermoelectric Sb2Te3/PEDOT:PSS-PVP/Sb2Te3(ED) (STPPST) hybrid composite films were prepared by a multi-step coating process involving sputtering, electrospinning, and electrodeposition stages. The STPPST hybrid composites were characterized by field-emission scanning electron microscopy, X-ray diffraction, ultraviolet photoelectron spectroscopy, and infrared spectroscopy. The thermoelectric performance of the prepared STPPST hybrid composites, evaluated in terms of the power factor, electrical conductivity and Seebeck coefficient, demonstrated enhanced thermoelectric efficiency over a reference Sb2Te3 film. The performance of the composite Sb2Te3/PEDOT:PSS-PVP/Sb2Te3 film was greatly enhanced, with σ = 365 S/cm, S = 124 μV/K, and a power factor 563 μW/mK.

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Section: Resultssupporting

confidence: 92%

“…Additionally, the two smaller peaks at 165.01 eV (S 2p1/2) and 163.78 (S 2p3/2) can be assigned to the sulfur atoms in the PEDOT fragments. These results are in good agreement with previous reports [32,33]. Figure 4d shows the FT-IR spectrum for the STPPST composite film (Figure 4b) in the range of 4000−650 cm⁻ 1 .…”

Section: Resultssupporting

confidence: 92%

Fabrication of PEDOT: PSS-PVP Nanofiber-Embedded Sb2Te3 Thermoelectric Films by Multi-Step Coating and Their Improved Thermoelectric Properties

2020

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“…In the case where HTL Solar is incorporated above the BHJ layer in the inverted structure, many challenges with regard to surface properties and potential of interface instability need to be overcome . Also, the introduction of bilayer HTLs led drastic decrease of C–N + peaks (400.6 eV) preventing the partial protonation of C–N functional groups in ITIC‐Th against UV‐exposure (information of N 1s and W 4f peaks are explained in Figure S21c,d, Supporting Information) . Consequently, the incorporation of WO 3 layer improved interfacial matching in BHJ layer/WO 3 /HTL Solar compared with BHJ layer/HTL Solar, which led to compact stacking of PEDOT molecules resulting in high conductivity with low R S and photostability.…”

Section: Resultsmentioning

confidence: 99%

“…These properties are consistent with the transmittance trends calculated for the interface of the HTLs and BHJ layer (Position 2) and indicate increased photostability owing to the incorporation of WO 3 layer. [95] Consequently, the incorporation of WO 3 layer improved interfacial matching in BHJ layer/ WO 3 /HTL Solar compared with BHJ layer/HTL Solar, which led to compact stacking of PEDOT molecules resulting in high conductivity with low R S and photostability. Energy Mater.…”

Section: Photostability Of Htlsmentioning

confidence: 99%

Evaporation‐Free Nonfullerene Flexible Organic Solar Cell Modules Manufactured by An All‐Solution Process

Han

Jeon

Lee

et al. 2019

Advanced Energy Materials

100

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fabricated for application over a large area, and applicability in flexible electronics. [1][2][3][4][5][6] It is possible to design high-performance devices by designing photoactive materials that constitute a bulk heterojunction (BHJ), [7][8][9] device engineering, [10][11][12][13] and a combination of these. [14,15] Therefore, this has attention as an area in which commercialization can occur through the application of flexible, wearable, and portable devices, and building-integrated photovoltaics. [4,[16][17][18][19][20] Recently, different methods such as spin coating, [21][22][23] slotdie coating, [24][25][26] and blade coating, [27,28] are being attempted to develop large-area modules with laboratory-to-industrial applications. Among them, slot-die coating can easily control each layer and the related processing factors, such as discharge rate and speed, thus enabling control of thickness and conformation. Therefore, it is the most appropriate coating method to use to produce devices and modules with large areas. [16,29] Krebs and co-workers fabricated flexible OSC modules using a roll-to-roll (R2R) manufacturing process called "ProcessOne." Their flexible OSC modules with power conversion efficiencies (PCEs) of 2-3% demonstrated an energy payback time (EPBT) of 2.02-1.35 years. [30,31] Using Proces-sOne, the BHJ layer and buffer layer were formed using slot-die coating and the Ag back electrode was formed via screen printing; this resulted in the design of OSC modules with inverted structures, which enabled cost-effective production. [32,33] Several particular challenges need to be considered in the manufacturing of this type of OSC modules using an R2R process; these included thermally treating the film [34,35] and ensuring the thermal stability of the substrate [36] the uniformity of the film morphology, [22][23][24] and the evaporation process of the buffer layer and the electrode. [3,25,26,37] The large-area flexible OSC modules have been reported their efficiencies with various materials and coating methods. In flexible unit-cells with small-area, Peng and co-workers recently reported high PCE of 14.06% introducing ternary heterojunction strategy in active area of 0.04 cm 2 . [38] The flexible OSC module based thermally evaporated top electrode reported relatively higher performances. Zhou and co-workers reported tandem structure with PCE of 6.5% in active area of 10.5 cm 2 , also, Ma and co-workers reported ternary structure with PCE of To ensure laboratory-to-industry transfer of next-generation energy harvesting organic solar cells (OSCs), it is necessary to develop flexible OSC modules that can be produced on a continuous roll-to-roll basis and to apply an allsolution process. In this study, nonfullerene acceptors (NFAs)-based donor polymer, SMD2, is newly designed and synthesized to continuously fabricate high-performance flexible OSC modules. Also, multifunctional hole transport layers (HTLs), WO 3 /HTL solar bilayer HTLs, are developed and applied via an all-solution process called "ProcessOne...

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“…One of the most popular polythiophenes in the field of organic electronic devices is the poly-3,4,-ethylene dioxythiophene (PEDOT) in the form of a polymer mixture with polystyrene sulfonate (PSS) (see Scheme 1a), which for the last two decades has been intensively studied because of its high conductivity and excellent stability. [1][2][3][4][5] Thin…”

Section: Introductionmentioning

confidence: 99%

Relationship between Charge Transfer Diffusion Coefficients and Doping Level for electro generated thin PEDOT films on ITO

Palma-Cando

Frontana‐Uribe

Varela-Guerrero

2019

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Thin films of poly-3,4-ethylene dioxythiophene (PEDOT) were electrodeposited on transparent electrodes of indium tin oxide (ITO) using potentiostatic regime. These films had thicknesses ranging from 15 nm to 60 nm and were studied using UV-vis absorption and chronoamperometric techniques in monomer-free tetrabutylammonium perchlorate/acetonitrile solutions. The charge transfer diffusion coefficient (D) of the films were calculated using Cottrell model for a wide range of potential steps from −1.60 to 1.60 V vs. Ag°/AgNO3. For p-doped films, the highest diffusion coefficients were obtained when a potential of 0.70 V was applied. Moreover, a direct relationship between film thickness and their diffusion coefficients was found for thin PEDOT films showing D values up to 1.4 × 10−9 cm2 s−1 for 60 nm thickness films. These values are remarkably higher than the D of 1.8 × 10−11 cm2 s−1 obtained for spin-coated PEDOT: PSS films of similar thickness.

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Enhanced electroluminescent efficiency with ionic liquid doped into PEDOT:PSS hole-injecting layer

Cited by 8 publications

References 36 publications

Fabrication of PEDOT: PSS-PVP Nanofiber-Embedded Sb2Te3 Thermoelectric Films by Multi-Step Coating and Their Improved Thermoelectric Properties

Fabrication of PEDOT: PSS-PVP Nanofiber-Embedded Sb2Te3 Thermoelectric Films by Multi-Step Coating and Their Improved Thermoelectric Properties

Evaporation‐Free Nonfullerene Flexible Organic Solar Cell Modules Manufactured by An All‐Solution Process

Relationship between Charge Transfer Diffusion Coefficients and Doping Level for electro generated thin PEDOT films on ITO

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