Hybrid Graphene Quantum Dots@Graphene Foam Nanosheets for Dye‐Sensitized Solar Cell Electrodes

Chang, Quanhong; Ma, Zhoujing; Wang, Jinzhong; Li, Panpan; Shi, Wangzhou; Chen, Qi; Huang, Yuewu; Huang, Lei

doi:10.1002/ente.201500194

Cited by 16 publications

(7 citation statements)

References 59 publications

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“…In 2016, Chang et al synthesized GQDs@GR foam nanosheets for application of DSSC electrodes. 100 The fabricated electrodes had a high energy conversion efficiency of 9.59% with an open-circuit voltage of 0.75 V. The abundant defect sites at the edges of GQDs provided excellent electrocatalytic activity for the reduction of I 3…”

Section: Solar Cellsmentioning

confidence: 99%

Recent progress in the preparation and application of quantum dots/graphene composite materials

et al. 2017

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Section: Solar Cellsmentioning

confidence: 99%

Recent progress in the preparation and application of quantum dots/graphene composite materials

et al. 2017

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“…Moreover, the QDs/GR hybrids have been successfully applied in dye-sensitized solar cells (DSSCs). In 2016, Chang et al 120 synthesized GQDs@GR foam nanosheets as the counter electrodes for DSSC. The fabricated device performed a high energy conversion e±ciency of 9.59% with an open-circuit voltage of 0.75 V. The abundant defect sites at the edges of GQDs provide excellent electrocatalytic activity for the reduction of I À 3 .…”

Section: And 19(c)]mentioning

confidence: 99%

Review of the Synthetic Techniques and Applications of the Quantum Dots/Graphene Composites

Duan

Zeng

Sun

et al. 2018

NANO

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The Quantum Dots/Graphene (QDs/GR) composites have attracted numerous interests caused by its unique physical and chemical properties in past few decades. The shortages of the single QD and graphene materials could be remedied by the synergistic effects from QDs/GR composite materials; meanwhile, some unique phenomena and superior physical properties were also produced. The QDs/GR composites processed better photocatalytic activities, higher photon capture abilities and excellent optical responsibilities. Therefore, they were widely applied in various techniques. Here, we reviewed and discussed recent research progresses about the QDs/GR composites and focused on their industrial preparation and commercial applications. Among these synthetic methods, ion beam sputtering deposition (IBSD) and molecular beam epitaxy (MBE) were discussed in detail because they could be directly applied in commercial industry for preparing size-tunable quantum dots. In another part, the applications of the QDs/GR composites were also discussed, the advanced physical and chemical properties promoted these composites to have numerous potential for being applied in photodetectors, lithium ion batteries, solar cells, supercapacitors and other devices. The appropriate synthetic method for QDs/GR materials is highly dependent on the requirements of its applications. We firmly believe that the direct synthesis technique of ideal QDs/GR composite for specific applications is a challenge and research emphasis for scientist and engineers in future.

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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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Hybrid Graphene Quantum Dots@Graphene Foam Nanosheets for Dye‐Sensitized Solar Cell Electrodes

Cited by 16 publications

References 59 publications

Recent progress in the preparation and application of quantum dots/graphene composite materials

Recent progress in the preparation and application of quantum dots/graphene composite materials

Review of the Synthetic Techniques and Applications of the Quantum Dots/Graphene Composites

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

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