Graphene oxide-based nanomaterials for efficient photoenergy conversion

Yeh, Te Fu; Teng, Chiao Yi; Chen, Liang Che; Chen, Shean Jen; Teng, Hsisheng

doi:10.1039/c5ta07780j

Cited by 77 publications

(38 citation statements)

References 228 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A perovskite precursor solution was spin-coated in the glove box. The (FAPbI 3 [21,22] This composition contains a lead excess as reported previously. The solution was spin-coated at 1000 rpm for 10 s and continuously at 6000 rpm for 30 s. During the second step, when approximately 15 s left before finish, 100 mL of anhydrous chlorobenzene was added.…”

Section: Device Fabricationmentioning

confidence: 73%

“…[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%

See 1 more Smart Citation

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

Section: Device Fabricationmentioning

confidence: 73%

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

show abstract

“…So it is important to modify the GO sheets with both p‐ and n‐type conductivities that may produce a photocatalytic medium effective for overall water splitting into H 2 and O 2 . Based on the structural characteristics required for photocatalytic water‐splitting, Teng et al synthesized N‐doped GO‐QDs as the catalyst . The electrochemical Mott−Schottky analysis results indicated that the obtained N‐doped GO‐QDs exhibited both p‐ and n‐type conductivities, in which the n‐conductivity was caused by embedding N atoms in the graphene frame, and the p‐conductivity by grafting oxygen functionalities on the graphene surface.…”

Section: N‐doped Graphenementioning

confidence: 99%

Controllable Synthesis of Doped Graphene and Its Applications

Xue

Bao

et al. 2014

Small

View full text Add to dashboard Cite

Graphene is a wonder material with the ultimate smallest thickness that is readily accessible to various approaches for engineering its excellent properties. Graphene doping is an efficient way to tailor its electric properties and expand its applications. This topic covers wide research fields and has been developing rapidly. This article presents a broad and comprehensive overview of the developments in the preparation and applications of doped graphene including doping methods, doping levels, doping effect and types of heteroatoms. Very recent advances are also presented. In addition, existing problems in terms of achieving greater control over and further developments of doped graphene are also discussed.

show abstract

“…The heteroatom doping approach of introducing impurities into a matrix of nanocarbon materials, through surface transfer doping and substitutional doping, presents an avenue to efficiently enhancep hotocatalytic properties of carbonaceousm aterials through the improvedo ptical and electrochemical properties, structurala nd textural characteristics,t he adsorptive and mass transfer behavior,a nd the properties of active sites. [1,4,[7][8][9][10][77][78][79][80][81][82][83][84] As ac onsequence, the doping of photocatalysts garnerscontinually growing interest. By searching "photocatalysis" and then refining by "doping" (SciFinder,o nA pril 20, 2017),2 0799 publications can be obtained.I ndicated in Figure2is the explosive growth of doping of photocatalysts in the last ten years.…”

Section: Introductionmentioning

confidence: 99%

“…By searching "photocatalysis" and then refining by "doping" (SciFinder,o nA pril 20, 2017),2 0799 publications can be obtained.I ndicated in Figure2is the explosive growth of doping of photocatalysts in the last ten years. Indeed, the doping by heteroatoms has attracted great interest in fabricating advanced photocatalysts including both non-metallic photocatalysts, [1,4,[7][8][9][10][77][78][79][80][81][82][83][84] and metallicp hotocatalysts. [84][85][86][87][88][89][90][91][92][93][94][95] In this Review,w ef ocus on the non-metallic heteroatoms-doped carbonaceous photocatalysts for energy conversion and environmental remediation applications.…”

Section: Introductionmentioning

confidence: 99%

Heteroatom‐Doped Carbonaceous Photocatalysts for Solar Fuel Production and Environmental Remediation

Zhao

Zhang

2017

ChemCatChem

View full text Add to dashboard Cite

Photocatalytic solar energy conversion and environmental remediation including water splitting, CO2 reduction, and pollutant degradation have attracted rapidly growing attention, owing to global fossil fuel depletion and increasing environmental issues. From the viewpoint of the broad availability, good environmental acceptability, high corrosion resistance, as well as the readily tailorable microstructure, electronic structure and surface chemical properties, carbonaceous materials have been demonstrated as promising and sustainable low‐cost metal‐free alternatives to metal‐based photocatalysts for solar fuel production and pollutant degradation. The non‐metallic heteroatoms doping approach has been considered as a powerful tool for modulating electronic structure, morphology, surface structure and surface chemistry, textural properties, optical properties, and electrochemical properties, as well as catalytic properties of carbonaceous photocatalysts. This Review represents a comprehensive overview of the latest advance in preparation and physicochemical properties of diverse non‐metallic heteroatoms‐doped carbonaceous materials, as well as their applications in heterogeneous photocatalysis towards solar energy conversion and environmental remediation. The physicochemical properties and photocatalytic performance of the carbonaceous photocatalysts are carefully compared, as well as a brief overview of fundamental principles for the promoting effect of heteroatoms‐doping is also presented. In addition, the future perspectives on the opportunities and challenges of heteroatoms doping for fabricating novel and excellent carbonaceous photocatalysts are outlined.

show abstract

Graphene oxide-based nanomaterials for efficient photoenergy conversion

Abstract: Graphene oxide nanomaterials with tunable electronic properties act as efficient photoenergy-conversion media in photoluminescence, photovoltaics, and photocatalytic water splitting.

Cited by 77 publications

References 228 publications

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

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

Controllable Synthesis of Doped Graphene and Its Applications

Heteroatom‐Doped Carbonaceous Photocatalysts for Solar Fuel Production and Environmental Remediation

Contact Info

Product

Resources

About