Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapour deposition

Chen, Zongping; Ren, Wencai; Gao, Libo; Liu, Bilu; Pei, Songfeng; Cheng, Hui‐Ming

doi:10.1038/nmat3001

Cited by 3,521 publications

(2,509 citation statements)

References 29 publications

Supporting

Mentioning

2,429

Contrasting

Unclassified

Order By: Relevance

“…This density is nearly four times lower than that of the most lightweight CVD-grown graphene foams (Z2 mg cm À 3 ) (ref. 5) and is approximately half of that of ultralight nickel lattice recently reported (Z0.9 mg cm À 3 ) (ref. 24).…”

Section: Resultsmentioning

confidence: 67%

“…A number of methods, such as self-gelation and chemical vapour deposition (CVD) over a porous catalyst have recently been developed to fabricate highly porous graphene cellular monoliths [5][6][7][8][9][10][11][12] . However, as with most of the existing porous carbon materials 13 , the resulting graphene monoliths are generally brittle and have small recoverable deformation before failure unless they are infiltrated with an elastomeric polymer 5 or grown on pre-formed carbon nanotube aerogels 14 . Superelasticity that has been observed in foams made of carbon-based tubular or fibrillar nanostructures [15][16][17][18][19][20][21] has not been achieved in foams solely based on graphene sheets.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Biomimetic superelastic graphene-based cellular monoliths

et al. 2012

View full text Add to dashboard Cite

Many applications proposed for graphene require multiple sheets be assembled into a monolithic structure. The ability to maintain structural integrity upon large deformation is essential to ensure a macroscopic material which functions reliably. However, it has remained a great challenge to achieve high elasticity in three-dimensional graphene networks. Here we report that the marriage of graphene chemistry with ice physics can lead to the formation of ultralight and superelastic graphene-based cellular monoliths. Mimicking the hierarchical structure of natural cork, the resulting materials can sustain their structural integrity under a load of 450,000 times their own weight and can rapidly recover from 480% compression. The unique biomimetic hierarchical structure also provides this new class of elastomers with exceptionally high energy absorption capability and good electrical conductivity. The successful synthesis of such fascinating materials paves the way to explore the application of graphene in a self-supporting, structurally adaptive and 3D macroscopic form.

show abstract

Section: Resultsmentioning

confidence: 67%

mentioning

confidence: 99%

Biomimetic superelastic graphene-based cellular monoliths

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Recently, several attempts have been made to build graphene devices on h-BN substrates to exploit their complementary properties [7][8][9][10] . Progress in this direction has been limited by difficulties in achieving scalable growth of uniform h-BN layers using chemical vapour deposition, a technique used to deposit high-quality graphene layers [11][12][13][14][15][16][17][18][19] . There have also been a few attempts to co-deposit graphene and h-BN domains to build hybridized two-dimensional boron carbonitride (h-BNC) atomic layers [10][11][12][13][14][15][16][17][18][19][20][21][22] .…”

mentioning

confidence: 99%

Direct chemical conversion of graphene to boron- and nitrogen- and carbon-containing atomic layers

et al. 2014

View full text Add to dashboard Cite

Graphene and hexagonal boron nitride are typical conductor and insulator, respectively, while their hybrids hexagonal boron carbonitride are promising as a semiconductor. Here we demonstrate a direct chemical conversion reaction, which systematically converts the hexagonal carbon lattice of graphene to boron nitride, making it possible to produce uniform boron nitride and boron carbonitride structures without disrupting the structural integrity of the original graphene templates. We synthesize high-quality atomic layer films with boron-, nitrogen-and carbon-containing atomic layers with full range of compositions. Using this approach, the electrical resistance, carrier mobilities and bandgaps of these atomic layers can be tuned from conductor to semiconductor to insulator. Combining this technique with lithography, local conversion could be realized at the nanometre scale, enabling the fabrication of in-plane atomic layer structures consisting of graphene, boron nitride and boron carbonitride. This is a step towards scalable synthesis of atomically thin two-dimensional integrated circuits.

show abstract

“…[2][3][4][5] The development of solution-processable graphene, such as the chemical exfoliation of graphite into graphene oxide, allowed the functionalization and processing of graphene, extending its use in the different layers of solutionprocessable solar cells. [6,7] Among different solar cell technologies, organic-inorganic hybrid perovskite solar cells (PSCs) have been dominating the interest of the scientific research community for their impressive technological development with power conversion efficiency (PCE) values beyond 22 % in a short of six years of research.…”

mentioning

confidence: 99%

Beneficial Role of Reduced Graphene Oxide for Electron Extraction in Highly Efficient Perovskite Solar Cells

et al. 2016

View full text Add to dashboard Cite

In this work we systematically investigated the role of reduced graphene oxide (rGO) in hybrid perovskite solar cells (PSCs). By mixing rGO within the mesoporous TiO 2 (m-TiO 2 ) matrix, highly efficient solar cells with power conversion efficiency values up to 19.54 % were realized. In addition, the boosted beneficial role of rGO with and without Li-treated m-TiO 2 is highlighted, improving transport and injection of photoexcited electrons. This combined system may pave the way for further development and optimization of electron transport and collection in high efficiency PSCs.Since its isolation in 2004, [1] graphene has had a huge impact on applications in optoelectronic and photon energy conversion, owing to its unique electronic, optical, and mechanical properties. [2][3][4][5] The development of solution-processable graphene, such as the chemical exfoliation of graphite into graphene oxide, allowed the functionalization and processing of graphene, extending its use in the different layers of solutionprocessable solar cells. [6,7] Among different solar cell technologies, organic-inorganic hybrid perovskite solar cells (PSCs) have been dominating the interest of the scientific research community for their impressive technological development with power conversion efficiency (PCE) values beyond 22 % in a short of six years of research. [8] However, further improvements are necessary to optimize the PSC device operation and stability, and enhance the device performance. From this point, mixed graphene-based derivatives have been proposed to further enhance the device properties. [7] Used in various forms and with different functionalities, either incorporated in mesoscopic or in planar device configuration, [9,10] functionalized reduced graphene oxide (rGO) derivatives have been successfully employed for improved charge extraction in the electrontransport material (ETM) [9,11,12] or hole-transport material (HTM) [13] in PSCs. Its ability to effectively reduce the chargerecombination pathways and decrease the leakage currents has been demonstrated, with a similar role as in organic solar cells. [14][15][16] However, all of the PCEs reported are limited to less than 14 % and the perovskite was not formed as a perfect film, which casts the doubt on the real beneficial role of rGO on high-efficiency PSCs. In contrast to many applications of carbon-based materials that are usually introduced at the perovskite/TiO 2 or perovskite/HTM interfaces, or in substitution of the HTM itself, [17,18] here we propose a systematic study by exploring three different configurations as shown in Figure 1.We integrated the rGO: 1) in the 2,2',7,7'-tetrakis(N,N'-di-pmethoxyphenylamine)-9,9'-spirobifluorene (spiro-OMeTAD) HTM, 2) in the matrix of the active perovskite layer, and 3) within the mesoporous TiO 2 (m-TiO 2 ) ETM. In this study, mesoscopic PSCs are composed of a fluorine doped tin oxide (FTO)-coated glass substrate, a compact TiO 2 layer followed by a m-TiO 2 layer, a mixed (FAPbI 3 ) 0.85 (MAPbBr 3 ) 0.15 (FA = formamidin...

show abstract

Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapour deposition

Cited by 3,521 publications

References 29 publications

Biomimetic superelastic graphene-based cellular monoliths

Biomimetic superelastic graphene-based cellular monoliths

Direct chemical conversion of graphene to boron- and nitrogen- and carbon-containing atomic layers

Beneficial Role of Reduced Graphene Oxide for Electron Extraction in Highly Efficient Perovskite Solar Cells

Contact Info

Product

Resources

About