Current and future perspectives of carbon and graphene quantum dots: From synthesis to strategy for building optoelectronic and energy devices

Ghosh, Dibyendu; Sarkar, Krishnendu; Devi, Pooja; Kim, Ki‐Hyun; Kumar, Praveen

doi:10.1016/j.rser.2020.110391

Cited by 200 publications

(105 citation statements)

References 168 publications

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“…The bond between the shielding molecules and perovskite molecules is insufficient to protect the material from water and oxygen for a lengthy period of time. Inorganic materials have a large bandgap that can reduce the surface recombination speed and change the surface work function energy level for a better match [ 118 , 119 , 120 , 121 ]. They are chemically stable in humid air and can be used as a passivation material for lead–halide perovskites.…”

Section: Interface Modificationmentioning

confidence: 99%

Review of Interface Passivation of Perovskite Layer

Wang

Liu

et al. 2021

Nanomaterials

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Perovskite solar cells (PSCs) are the most promising substitute for silicon-based solar cells. However, their power conversion efficiency and stability must be improved. The recombination probability of the photogenerated carriers at each interface in a PSC is much greater than that of the bulk phase. The interface of a perovskite polycrystalline film is considered to be a defect-rich area, which is the main factor limiting the efficiency of a PSC. This review introduces and summarizes practical interface engineering techniques for improving the efficiency and stability of organic–inorganic lead halide PSCs. First, the effect of defects at the interface of the PSCs, the energy level alignment, and the chemical reactions on the efficiency of a PSC are summarized. Subsequently, the latest developments pertaining to a modification of the perovskite layers with different materials are discussed. Finally, the prospect of achieving an efficient PSC with long-term stability through the use of interface engineering is presented.

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Section: Interface Modificationmentioning

confidence: 99%

Review of Interface Passivation of Perovskite Layer

Wang

Liu

et al. 2021

Nanomaterials

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“…Graphene QDs (GQDs) and carbon QDs have attracted immense interest as promising candidates for PD application because of their nontoxicity, biocompatibility, and excellent electrical, optical, and physicochemical properties, such as tunable bandgap, high absorptivity, nontoxicity, high stability, and cost-effectiveness (Sun et al, 2006;Pan et al, 2010;Zhang et al, 2015;Tajik et al, 2020;Ghosh et al, 2021). Generally, GQDs have layered structures and possess strong quantum confinement effect with sizes down to 100 nm.…”

Section: Carbon and Graphene Quantum Dotsmentioning

confidence: 99%

Toward Green Optoelectronics: Environmental-Friendly Colloidal Quantum Dots Photodetectors

Miao

Cho

2021

Front. Energy Res.

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Colloidal quantum dots (CQDs) have attracted tremendous research interests in future-generation energy, electronic, optoelectronic, and bio-imaging applications due to their fascinating material properties, such as solution processability at room temperature and under ambient conditions, compatibility with various functional materials, and high photostability as well as photosensitivity. Among the various optoelectronic applications of CQDs, optical light sensors, which convert photonic energy into electrical signals, have been of particular interest because they are one of the key building blocks for modern communication and imaging applications, including medical X-ray and near-infrared imaging, visible light cameras, and machine vision. However, CQDs, which have been widely researched for photodetectors (PDs) so far, contain toxic and hazardous heavy metals, namely, lead (Pb), cadmium (Cd), and mercury (Hg). These substances are extremely toxic and harmful to the environment as well as human beings. Therefore, it is highly desirable to substitute CQDs containing heavy metals with nontoxic and environmentally friendly ones to realize green optoelectronics. In this review article, we introduce various kinds of heavy metal–free CQDs and their PD applications. This article comprehensively includes working mechanisms of PDs, various kinds of nontoxic and environmentally friendly CQD-based PDs, advanced heterojunction PDs, and discussion for future perspectives.

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“…As a consequence, carbon nanomaterials are widely utilized in many sectors. They are used in environmental applications for water treatment [14,15], and other separation processes [16,17], for environment remediation [18][19][20]; in electronics where they have shown remarkable utility for the excellent electrical [21,22] and optical properties [23][24][25]. This, combined with the molecular sized diameter and microscopic structure enable the development of novel electronic devices [26].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanomaterials: Synthesis, Functionalization and Sensing Applications

Speranza

2021

Nanomaterials

205

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Recent advances in nanomaterial design and synthesis has resulted in robust sensing systems that display superior analytical performance. The use of nanomaterials within sensors has accelerated new routes and opportunities for the detection of analytes or target molecules. Among others, carbon-based sensors have reported biocompatibility, better sensitivity, better selectivity and lower limits of detection to reveal a wide range of organic and inorganic molecules. Carbon nanomaterials are among the most extensively studied materials because of their unique properties spanning from the high specific surface area, high carrier mobility, high electrical conductivity, flexibility, and optical transparency fostering their use in sensing applications. In this paper, a comprehensive review has been made to cover recent developments in the field of carbon-based nanomaterials for sensing applications. The review describes nanomaterials like fullerenes, carbon onions, carbon quantum dots, nanodiamonds, carbon nanotubes, and graphene. Synthesis of these nanostructures has been discussed along with their functionalization methods. The recent application of all these nanomaterials in sensing applications has been highlighted for the principal applicative field and the future prospects and possibilities have been outlined.

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Current and future perspectives of carbon and graphene quantum dots: From synthesis to strategy for building optoelectronic and energy devices

Cited by 200 publications

References 168 publications

Review of Interface Passivation of Perovskite Layer

Review of Interface Passivation of Perovskite Layer

Toward Green Optoelectronics: Environmental-Friendly Colloidal Quantum Dots Photodetectors

Carbon Nanomaterials: Synthesis, Functionalization and Sensing Applications

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