Effect of Secondary Doping Using Sorbitol on Structure and Transport Properties of PEDOT–PSS Thin Films

Khasim, Syed; Pasha, Apsar; Roy, Aashis S.; Parveen, Ameena; Badi, N.

doi:10.1007/s11664-017-5437-5

Cited by 20 publications

(14 citation statements)

References 28 publications

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“…All layers were fabricated as to afford similar thickness (≈10 µm). The decrease of the polaronic band (850 nm) along with an increase of the bipolaronic band (2000 nm) suggests that the addition of sorbitol enhances the doping efficiency of PSS, generating more highly doped PEDOT oligomers (Figure d) …”

Section: Functionality Morphology and Doping Of Interconnection Layermentioning

confidence: 99%

Interface Molecular Engineering for Laminated Monolithic Perovskite/Silicon Tandem Solar Cells with 80.4% Fill Factor

Quiroz

Spyropoulos

Salvador

et al. 2019

Adv Funct Materials

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A multipurpose interconnection layer based on poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonate) (PEDOT:PSS), and d-sorbitol for monolithic perovskite/silicon tandem solar cells is introduced. The interconnection of independently processed silicon and perovskite subcells is a simple add-on lamination step, alleviating common fabrication complexities of tandem devices. It is demonstrated experimentally and theoretically that PEDOT:PSS is an ideal building block for manipulating the mechanical and electrical functionality of the charge recombination layer by controlling the microstructure on the nano-and mesoscale. It is elucidated that the optimal functionality of the recombination layer relies on a gradient in the d-sorbitol dopant distribution that modulates the orientation of PEDOT across the PEDOT:PSS film. Using this modified PEDOT:PSS composite, a monolithic two-terminal perovskite/silicon tandem solar cell with a steady-state efficiency of 21.0%, a fill factor of 80.4%, and negligible open circuit voltage losses compared to single-junction devices is shown. The versatility of this approach is further validated by presenting a laminated two-terminal monolithic perovskite/organic tandem solar cell with 11.7% power conversion efficiency. It is envisioned that this lamination concept can be applied for the pairing of multiple photovoltaic and other thin film technologies, creating a universal platform that facilitates mass production of tandem devices with high efficiency.

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Section: Functionality Morphology and Doping Of Interconnection Layermentioning

confidence: 99%

Interface Molecular Engineering for Laminated Monolithic Perovskite/Silicon Tandem Solar Cells with 80.4% Fill Factor

Quiroz

Spyropoulos

Salvador

et al. 2019

Adv Funct Materials

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“…However, the electrical conductivity of PEDOT:PSS is lower than that of other conductive polymers or metal oxides, which is less than 1 S cm −1 , making PEDOT:PSS a standalone electrode that is unsuitable for bioelectronics application. 57,58 Fortunately, it is possible to boost the conductivity by using secondary dopants, in particular by introducing organic solvents such as ethylene glycol (EG) and dimethyl sulfoxide (DMSO), [59][60][61][62][63][64][65][66] or by introducing poly(alcohols) such as sorbitol and glycerol, [67][68][69][70][71] or by adding surfactants such as sodium dodecyl sulphate (SDS), hexadecyltrimethylammonium bromide (CTAB), and poly(oxyethylene) phenyl ether, 72,73 or by treating acids such as phosphoric acid (H 3 PO 4 ), sulfuric acid (H 2 SO 4 ), and sulfonic acid. [74][75][76] Based on the literature, the transparent and highly conductive PEDOT:PSS films have been studied extensively, in particular for replacing indium tin oxide (ITO) in photovoltaics (OPV), [77][78][79][80] solar cells, [81][82][83] OLED devices, 84 and touch screens.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms for doped PEDOT:PSS electrical conductivity improvement

et al. 2021

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“…Kim et al [32] reported that the addition of DMSO or dimethylformamide (DMF) enhances the conductivity of PEDOT:PSS by %2 orders in magnitude. Khasim et al [33] and Pasha et al [34] reported PEDOT: PSS with an enhancement in conductivity by two orders with the addition of 20 wt% of sorbitol and DMSO, respectively. Even though conductivity of the PEDOT:PSS can be enhanced through several methods, polymer composite films with conducting nanofillers are widely accepted as a better choice for the fabrication of highly flexible electrode by simple solution method.…”

Section: Introductionmentioning

confidence: 99%

Solution Processable PEDOT:PSS/Multiwalled Carbon Nanotube Composite Films for Flexible Electrode Applications

Jasna

Raman

Jayalekshmi

et al. 2018

Phys. Status Solidi A

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High‐performance flexible optoelectronic devices have great potential as active elements for flexible and wearable electronics. The authors report highly flexible conducting poly (3, 4‐ethylene dioxythiophene):polystyrene sulfonate/multiwalled carbon nanotubes (PEDOT:PSS/MWCNT) composite thin films synthesized by simple, cost effective rod‐coating technique. The effect of MWCNT on PEDOT:PSS matrix is analyzed by spin coating PEDOT:PSS/MWCNT composite on glass substrates with varying concentration (0–2 wt%) of MWCNT. Field emission scanning electron microscope (FE‐SEM) images confirm the uniform dispersion of MWCNT and formation of conducting path above 0.3 wt% of MWCNT. The conductivity of the spin coated films is increased from 1 Scm−1 to ≈20 Scm−1 on addition of 2 wt% of MWCNT. From UV‐Vis NIR spectra, the transparency of composite films in the visible range (at 550 nm) is found to decrease with respect to MWCNT loading. The PEDOT:PSS/MWCNT flexible electrode exhibit high electrical conductivity of 74 Scm−1 and high stability upon bending to a radius of curvature ≈9.6 mm. The features observed are an outcome of the interaction of MWCNT with PEDOT polymer as the back bone. These films are adhered to the substrate and the properties are stable upon bending the film for large number of cycles. To demonstrate the potential use of this composite film as an electrode, a thin film transistor is fabricated with PEDOT:PSS/MWCNT film as source and drain electrode. The device shows high field effect mobility of µsat = 1.16 cm2 V−1 s−1 with on/off ratio about 2.3 × 103. These favorable results make PEDOT:PSS/MWCNT conducting electrode as an excellent candidate for the next generation flexible electrodes realized by a facile solution process.

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Effect of Secondary Doping Using Sorbitol on Structure and Transport Properties of PEDOT–PSS Thin Films

Cited by 20 publications

References 28 publications

Interface Molecular Engineering for Laminated Monolithic Perovskite/Silicon Tandem Solar Cells with 80.4% Fill Factor

Interface Molecular Engineering for Laminated Monolithic Perovskite/Silicon Tandem Solar Cells with 80.4% Fill Factor

Mechanisms for doped PEDOT:PSS electrical conductivity improvement

Solution Processable PEDOT:PSS/Multiwalled Carbon Nanotube Composite Films for Flexible Electrode Applications

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