Ionic liquid-functionalized graphene quantum dots as an efficient quasi-solid-state electrolyte for dye-sensitized solar cells

Porfarzollah, Ali; Mohammad‐Rezaei, Rahim; Bagheri, Massoumeh

doi:10.1007/s10854-019-02761-4

Cited by 28 publications

(15 citation statements)

References 43 publications

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“…Recently, solid‐state or quasi‐solid‐state electrolytes are emerging to find a balance between high conductivity and low viscosity while suppressing volatility and corrosion as well as improving mechanical stability for enhanced flexibility (Figure 9d). [ 76,78 ] A recent work employed quantum dots (QDs) with N719 dye to boost the PCE to 7.39% through novel core–sheath design and the incorporation of carbon‐based electrodes. [ 58 ] However, the charge‐transfer intermediate layer formed in solid‐state FSDSSC may present optical loss in lower wavelength region, [ 54 ] indicating the necessity for a thinner and low‐loss material for enhanced photon harvesting.…”

Section: Fiber‐shaped Energy Harvesting Devicesmentioning

confidence: 99%

Fiber‐Shaped Electronic Devices

Fakharuddin

Giacomo

et al. 2021

Advanced Energy Materials

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Textile electronics embedded in clothing represent an exciting new frontier for modern healthcare and communication systems. Fundamental to the development of these textile electronics is the development of the fibers forming the cloths into electronic devices. An electronic fiber must undergo diverse scrutiny for its selection for a multifunctional textile, viz., from the material selection to the device architecture, from the wearability to mechanical stresses, and from the environmental compatibility to the end‐use management. Herein, the performance requirements of fiber‐shaped electronics are reviewed considering the characteristics of single electronic fibers and their assemblies in smart clothing. Broadly, this article includes i) processing strategies of electronic fibers with required properties from precursor to material, ii) the state‐of‐art of current fiber‐shaped electronics emphasizing light‐emitting devices, solar cells, sensors, nanogenerators, supercapacitors storage, and chromatic devices, iii) mechanisms involved in the operation of the above devices, iv) limitations of the current materials and device manufacturing techniques to achieve the target performance, and v) the knowledge gap that must be minimized prior to their deployment. Lessons learned from this review with regard to the challenges and prospects for developing fiber‐shaped electronic components are presented as directions for future research on wearable electronics.

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Section: Fiber‐shaped Energy Harvesting Devicesmentioning

confidence: 99%

Fiber‐Shaped Electronic Devices

Fakharuddin

Giacomo

et al. 2021

Advanced Energy Materials

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“…150,151 Nonetheless, the PCEs of DSSCs based on IL electrolytes are still lower than those of devices based on organic solvent electrolytes, 134 and also the leakage problems of ILs, limit their long-term operational stability, which restricts their application. 152 In this regard, carbon-based materials, such as graphene and its derivatives, have received considerable research attention as promising additives for enhancing the ionic conductivity and stability of polymer and IL electrolytes, due to the remarkable optical, electrical, mechanical, thermal and chemical properties of graphene. 134,149 Also, graphene/polymer or graphene/IL nanocomposites, result in the formation of interconnected networks, which not only provide efficient electron transport pathways through the electrolyte, but also enable the formation of quasi-solid state electrolytes, which reduce electrolyte evaporation and leakage, thereby, improving long-term operational stability.…”

Section: Graphene-based Electrolytementioning

confidence: 99%

“…Recently, Porfarzollah et al 152 integrated GQDs with an imidazolium-based IL, which enhanced the long-term stability of the electrolyte, and inhibited back electron transfer to the electrolyte, thereby suppressing carrier recombination, and increasing the electron lifetime. As a result, the hybrid quasisolid state electrolyte-based DSSCs exhibited a PCE of 4.57%, in comparison with 2.23 and 4.52%, for the GQDs and IL-based devices, respectively.…”

Section: Graphene-based Electrolytementioning

confidence: 99%

Recent advances in graphene-based materials for dye-sensitized solar cell fabrication

2020

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“…GQDs have been employed in PV cells since 2010 as potential electron donors [17] and light absorbers [18]. Researchers added GQDs in all the main compartments of DSSC which are in photoelectrodes [19], light absorbers/sensitizers [18,[20][21][22][23][24][25][26][27][28][29], electrolyte [30] and counter electrode [31][32][33][34][35][36]. Most researchers have used GQDs as light absorbers co-sensitized with various dyes, such as N719, N3, and D719 in quantum dot-sensitized solar cells (QDSSCs), which are analogous to DSSCs [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

New Assembly Method for Cellulose Derived Graphene Quantum Dots-Sensitized Solar Cells

Mahalingam

Lau

Omar

et al. 2021

Preprint

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Unambiguously layer by layer (LBL) assembly of graphene quantum dots (GQDs) and dye (GQDs/dye) on TiO2 photoanode is the traditional and straightforward approach in the fabrication of graphene quantum dot-sensitized solar cells (QDSSCs). Unfortunately, limited light absorption and low affinity of GQDs to TiO2 surface shadow the advantages of LBL and constrains its practical application. Herein, a new strategy of mixture configuration (GQDs+dye) was investigated. A distinctive nanoporous honeycomb hexagonal carbon network of GQDs was found with fewer defects single crystalline structure, and an average size of 9.87 nm was produced from cellulose. Experimental results demonstrated that LBL exhibited the highest efficiency of 16.76 % under low illumination but a lower efficiency (1.43%) than the mixture method (2.91%) under standard light. The increased Jsc (5.075 mA/cm2) and high charge collection efficiency (0.96) in the mixture sample indicated enhanced electron collection at TiO2. The less -OH groups on TiO2 provides a good surface intact of GQDs and N719. In addition to that, the high surface potential (33.47 mV) of the premixed sample restricted the photogenerated electrons to go into a deep state, reducing back electron transfer. Therefore, mixture assembly of co-sensitization is an effective approach for light-harvesting in QDSSC.

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Ionic liquid-functionalized graphene quantum dots as an efficient quasi-solid-state electrolyte for dye-sensitized solar cells

Cited by 28 publications

References 43 publications

Fiber‐Shaped Electronic Devices

Fiber‐Shaped Electronic Devices

Recent advances in graphene-based materials for dye-sensitized solar cell fabrication

New Assembly Method for Cellulose Derived Graphene Quantum Dots-Sensitized Solar Cells

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