Föster resonance energy transfer in solution-processed Si-nanoparticle/carbon nanotube nanocomposites

Pan, Xiaowei; Liu, Nan; Zheng, Dingxiang; Shi, Minmin; Wu, Gang; Wang, Mang; Chen, Hongzheng

doi:10.1088/0957-4484/20/41/415605

Cited by 9 publications

(8 citation statements)

References 28 publications

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“…375 Additionally, Pan et al synthesized Si NPs chemically linked to carbon nanotubes (CNTs) through the formation of an ester bond between the carboxylic acidterminated CNT and the ethoxy-terminated Si NC and observed EnT from the Si NPs to the CNTs. 376 Si QDs have also been chemically linked to organic molecules such as Ru II (polypyridine) complexes. Recently, Ross-Vasic et al synthesized blue emitting Si QDs functionalized with Ru II (2− 2′-bipyridine) 2 (4-(p-N-succinimidlylcarboxyphenyl)-2,2′-bipyridine).…”

Section: Role Of Molecules In Energy and Chargementioning

confidence: 99%

“…The dye was chemically coupled to the QDs through a thiol-maleimide reaction . Additionally, Pan et al synthesized Si NPs chemically linked to carbon nanotubes (CNTs) through the formation of an ester bond between the carboxylic acid-terminated CNT and the ethoxy-terminated Si NC and observed EnT from the Si NPs to the CNTs . Si QDs have also been chemically linked to organic molecules such as Ru II (polypyridine) complexes.…”

Section: Role Of Molecules In Energy and Charge Transfer Involving Co...mentioning

confidence: 99%

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Electronic Processes within Quantum Dot-Molecule Complexes

et al. 2016

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The subject of this review is the colloidal quantum dot (QD) and specifically the interaction of the QD with proximate molecules. It covers various functions of these molecules, including (i) ligands for the QDs, coupled electronically or vibrationally to localized surface states or to the delocalized states of the QD core, (ii) energy or electron donors or acceptors for the QDs, and (iii) structural components of QD assemblies that dictate QD-QD or QD-molecule interactions. Research on interactions of ligands with colloidal QDs has revealed that ligands determine not only the excited state dynamics of the QD but also, in some cases, its ground state electronic structure. Specifically, the article discusses (i) measurement of the electronic structure of colloidal QDs and the influence of their surface chemistry, in particular, dipolar ligands and exciton-delocalizing ligands, on their electronic energies; (ii) the role of molecules in interfacial electron and energy transfer processes involving QDs, including electron-to-vibrational energy transfer and the use of the ligand shell of a QD as a semipermeable membrane that gates its redox activity; and (iii) a particular application of colloidal QDs, photoredox catalysis, which exploits the combination of the electronic structure of the QD core and the chemistry at its surface to use the energy of the QD excited state to drive chemical reactions.

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Section: Role Of Molecules In Energy and Chargementioning

confidence: 99%

Section: Role Of Molecules In Energy and Charge Transfer Involving Co...mentioning

confidence: 99%

Electronic Processes within Quantum Dot-Molecule Complexes

et al. 2016

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“…Several techniques for Si NP and CNT integration were proposed, such as simple mechanical mixing with small Si NPs (average diameter of 10 nm), resulting in decorating the Si NPs on the surface of CNTs, − or with larger Si NPs (30–100 nm in diameter) that were dispersed in a CNT network. − Others proposed Si NP-filled CNT structures, covalent bonding between Si NPs and CNTs, , growth of CNTs on Si, , core–shell of CNTs and silicon-based precursor-derived glass-ceramics (no binder with spray) …”

Section: Introductionmentioning

confidence: 99%

Synthesis of Carbon Nanotubes Networks Grown on Silicon Nanoparticles as Li-Ion Anodes

et al. 2017

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Using chemical vapor deposition, we grew carbon nanotubes (CNTs) on the surface of Si nanoparticles (NPs) that were coated with a thin iron shell. We studied the CNT growth mechanisms and analyzed the influence of (1) varying annealing times and (2) varying growth times. We show that an initial annealing is necessary to reduce the iron oxide shell and to start the formation of Fe NPs and their consequent coarsening. We characterize the evolution of the catalyst morphology and its influence of the morphology and structure of the CNTs grown. We studied this nanocomposite of Si NPs interconnected by CNTs grown on them as anode material for Li-ion batteries. Compared to the pristine Si NPs, the Si-CNT nanocomposite brings an increase of 40% in specific capacity after 100 cycles at 1800 mA/gSi with a high stability and a very low capacity loss per cycle of 0.06%. The electrochemical performance demonstrates how efficient the CNT shell on the Si NP is to mitigate the usual failure mechanism of Si NPs. Thus, the in situ growth of CNTs on Si anode materials can be an efficient route toward the synthesis of more stable Si anode composites for a Li-ion battery.

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“…The singlet excited-state energy transfers efficiently from host to guest in hostguest system through the dipole-dipole interaction. 19,20 The rate of energy transfer depends on the distance "R" between the host and the guest molecules, and is given by [21][22][23][24][25]…”

Section: Resultsmentioning

confidence: 99%

Co-Host Comprising Hole-Transporting and Blue-Emitting Components for Efficient Fluorescent White OLEDs

Chen

Kao

et al. 2012

J. Electrochem. Soc.

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Efficient co-host emission layer has been demonstrated by mixing blue-emitting p-DMDPVBi and hole-transporting NPB in optimal weight ratio (w/w = 80/20). First, efficiency enhancement was observed in the fabrication of blue organic light-emitting diodes (ITO/NPB/p-DMDPVBi:NPB/TPBi/LiF/Al). Then, bright, efficient and stable fluorescent white organic light-emitting diodes were obtained by doping the optimal co-host emissive layer with orange dye (rubrene). The device performance was significantly improved, with a turn-on voltage, maximum luminance and maximum current efficiency of 2.9 V, 18100 cd/m 2 and 10.6 cd/A, respectively. The improvement mechanisms were elucidated using energy level diagrams, photoluminescence spectra, absorption spectra, and electroluminescence spectra. Current results show that forming the co-host emission layer is a promising way to improve device performance, making it applicable for facile fabrication of efficient OLEDs.Multilayer organic light-emitting diodes (OLEDs) have been considered as promising candidates for light-weight, fast-response, fullcolor displays ever since Tang and VanSlyke reported the first efficient OLED. 1-3 Besides, interest in application of white OLEDs (WOLEDs) technology for general solid-state lighting application or flat-panel display backlight has also been drastically increasing. Lots of effort had been put into improving the performance of WOLEDs and understanding their underlying mechanisms. Because doping is usually utilized to obtain white emission from guest-host doped emitter system, 4, 5 the efficiency of WOLEDs relies essentially on facilitated and balanced carriers injection, exciton confinement and effective host-to-guest energy transfer. 6 Moreover, host generating strong blue emission is a crucial factor in enhancing white emission efficiency. 7 The co-host structure had been considered and blended to enhance the device performance. [8][9][10][11] However, most of the co-host structures employed two host materials different from hole-transporting layer (HTL) and thus resulted in some problems, such as increasing the device complexity and generating more hetero-junctions which cause exciton quenching. [12][13][14] In this paper, we propose a wide bandgap blue-emitting 4,4 -bis[2,2-di(4-methylphenyl)-ethen-1-yl]biphenyl (p-DMDPVBi) as a co-host of conventional 4,4-bis[N-(1-naphthyl)-N-phenylamino] biphenyl (NPB). The p-DMDPVBi benefits electron injection only due to its energy level distribution. On the other hand, NPB is a well-established hole-transporting material suitable for fabricating high efficiency blue-emitting OLEDs (BOLEDs). 15, 16 This paper demonstrates that by blending hole-transporting NPB into the p-DMDPVBi results in efficient co-host emission layer, which possesses high efficiency in carriers injection, exciton confinement and effective host-to-guest energy transfer. With the optimal weight ratio of the NPB blended (20 wt %), the performance of BOLEDs can be greatly enhanced as well as WOLEDs. The performance enhancement and un...

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Föster resonance energy transfer in solution-processed Si-nanoparticle/carbon nanotube nanocomposites

Cited by 9 publications

References 28 publications

Electronic Processes within Quantum Dot-Molecule Complexes

Electronic Processes within Quantum Dot-Molecule Complexes

Synthesis of Carbon Nanotubes Networks Grown on Silicon Nanoparticles as Li-Ion Anodes

Co-Host Comprising Hole-Transporting and Blue-Emitting Components for Efficient Fluorescent White OLEDs

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