Time-resolved energy transfer from single chloride-terminated nanocrystals to graphene

Ajayi, Obafunso; Anderson, Nicholas C.; Cotlet, Mircea; Petrone, Nicholas; Gu, T.; Wolcott, Abraham; Gesuele, Felice; Hone, James; Owen, Jonathan S.; Wong, Chee Wei

doi:10.1063/1.4874298

Cited by 23 publications

(32 citation statements)

References 40 publications

(41 reference statements)

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“…On these selected examples, N em is quenched by a factor of approximately 50 (60) when the NC (NP) is adsorbed on graphene, as compared to a reference recorded on fused quartz. Over time scales larger than 100 ms, we also observe, in agreement with previous observations [13,14] that the blinking behavior, characteristic of NCs and NPs deposited on fused quartz, is seemingly reduced when the nanoemitters are adsorbed on graphene. This observation is presumably due to the acceleration of the excited state decay, which occurs before charge carriers may be trapped and allow the observation of dark and/or grey states [46,[53][54][55][56].…”

supporting

confidence: 92%

“…Highly efficient RET from individual CdSe/ZnS NCs to graphene, resulting in a quenching of the luminescence signal by more than one order of magnitude, has recently been reported [13]. Related effects have been observed using other types of semiconductor nanostructures [14,15,[25][26][27], fluorescent molecules [28][29][30] or NV centers [31,32]. The observation of robust and efficient RET to graphene has stimulated numerous applications in biosensing [33] and holds promise for distance sensing [34] and photodetection.…”

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confidence: 99%

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Distance Dependence of the Energy Transfer Rate from a Single Semiconductor Nanostructure to Graphene

et al. 2015

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The near-field Coulomb interaction between a nanoemitter and a graphene monolayer results in strong Förster-type resonant energy transfer and subsequent fluorescence quenching. Here, we investigate the distance dependence of the energy transfer rate from individual, (i) zero-dimensional CdSe/CdS nanocrystals and (ii) two-dimensional CdSe/CdS/ZnS nanoplatelets to a graphene monolayer. For increasing distances d, the energy transfer rate from individual nanocrystals to graphene decays as 1/d(4). In contrast, the distance dependence of the energy transfer rate from a two-dimensional nanoplatelet to graphene deviates from a simple power law but is well described by a theoretical model, which considers a thermal distribution of free excitons in a two-dimensional quantum well. Our results show that accurate distance measurements can be performed at the single particle level using graphene-based molecular rulers and that energy transfer allows probing dimensionality effects at the nanoscale.

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confidence: 92%

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confidence: 99%

Distance Dependence of the Energy Transfer Rate from a Single Semiconductor Nanostructure to Graphene

et al. 2015

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“…Graphene was the first 2D material to be investigated as exciton sink from nearby nanoemitters via nonradiative energy transfer . Later, graphene derivatives such as graphene oxide and reduced graphene oxide, as well as amorphous carbon layers and carbon nanotubes, were considered for their capability as exciton accepting media for light‐harvesting and bio‐sensing applications.…”

Section: Two‐dimensional Materials As Efficient Exciton Sinksmentioning

confidence: 99%

Near‐Field Energy Transfer Using Nanoemitters For Optoelectronics

Güzeltürk

Demir

2016

Adv Funct Materials

103

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wileyonlinelibrary.comtelecommunications. Conventional optoelectronics relies on high-temperature, gas-phase, epitaxy-grown semiconductors such as III-V compounds, [1,2] which make a mature materials technology. However, high-thermal budget, high-cost, and a limited set of substrates, which are CMOS-incompatible, hamper their use in versatile platforms, including flexible surfaces and large-area applications. Besides, the last decade has witnessed the rise of alternative low-dimensional semiconductor materials such as colloidal semiconductor nanocrystals, [3] organic semiconductors [4,5] and more recently, two-dimensional (2D) semiconductors. [6] These materials offer advantages over conventional semiconductors thanks to their low cost and low thermal budget growth, solution processability, and roll-to-roll fabrication on arbitrary substrates on a large scale. These materials are expected to impact a broad range of applications in optoelectronics and electronics.In bulk and weakly confined semiconductors, the excited electronic state is typically in the form of free electron-hole pairs due to weak Coulomb interaction energy (∼10 meV). [7] On the other hand, in low-dimensional nanoemitters, the excited state is essentially in the form of strongly bound electron-hole pairs (i.e., excitons) with large Coulomb interaction energy (10 meV) thanks to strong quantum confinement [8] and large dielectric screening, [9,10] allowing for strong light-matter interactions. Thus, in these nanoemitters, it becomes central to control excitonic interactions including exciton transfer, diffusion, trapping, dissociation, annihilation, and radiative recombination to accomplish the desired photonic properties and maximize optoelectronic performance.As it naturally happens in photosynthetic light-harvesting complexes, efficient and directed exciton flow is highly desired in semiconductor nanostructures. To this end, mastering exciton flow at the nanoscale through near-field nonradiative energy transfer has proven vital to accomplish efficient light generation and light utilization using nanoemitters and their hybrid nanostructures. [7,[11][12][13][14][15] In this feature article, we highlight recent developments in the field of energy transfer materials for optoelectronics. We review new insights on the near-field nonradiative transfer in excitonic nanoemitter systems. Our main focus is on hybrid systems comprising colloidal nanocrystals, and 2D and organic semiconductors. Also, Effective utilization of excitation energy in nanoemitters requires control of exciton flow at the nanoscale. This can be readily achieved by exploiting nearfield nonradiative energy transfer mechanisms such as dipole-dipole coupling (i.e., Förster resonance energy transfer) and simultaneous two-way electron transfer via exchange interaction (i.e., Dexter energy transfer). In this feature article, we review nonradiative energy transfer processes between emerging nanoemitters and exciton scavengers. To this end, we highlight the potential of colloidal semiconduct...

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“…Naturally, this mechanism does not influence the instantaneous scattering processes studied by Raman and SHG microscopy. Nonradiative energy transfer into two-dimensional crystal structures, especially graphene, has been studied intensely in recent years [44][45][46] . Due to the large, in-plane dipole moment 47 of excitons in ML MoS 2 , nonradiative energy transfer between MLs can be very efficient, but being mediated by dipole-dipole interaction, it has a very strong dependency on the distance d between energy donor and accepting layer, which was found to scale like d −2.5 for ML MoS 2 48 .…”

Section: Photoluminescence Spectroscopymentioning

confidence: 99%

Optical spectroscopy of interlayer coupling in artificially stacked MoS ₂ layers

et al. 2015

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We perform an optical spectroscopy study to investigate the properties of different artificial MoS2 bi-and trilayer stacks created from individual monolayers by a deterministic transfer process. These twisted bi-and trilayers differ from the common 2H stacking in mineral MoS2 in the relative stacking angle of adjacent layers and the interlayer distance. The combination of Raman spectroscopy, second-harmonic-generation microscopy and photoluminescence measurements allows us to determine the degree of interlayer coupling in our samples. We find that even for electronically decoupled artificial structures, which show the same valley polarization degree as the constituent MoS2 monolayers at low temperatures, there is a resonant energy transfer between individual layers which acts as an effective luminescence quenching mechanism.

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Time-resolved energy transfer from single chloride-terminated nanocrystals to graphene

Cited by 23 publications

References 40 publications

Distance Dependence of the Energy Transfer Rate from a Single Semiconductor Nanostructure to Graphene

Distance Dependence of the Energy Transfer Rate from a Single Semiconductor Nanostructure to Graphene

Near‐Field Energy Transfer Using Nanoemitters For Optoelectronics

Optical spectroscopy of interlayer coupling in artificially stacked MoS ₂ layers

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Time-resolved energy transfer from single chloride-terminated nanocrystals to graphene

Cited by 23 publications

References 40 publications

Distance Dependence of the Energy Transfer Rate from a Single Semiconductor Nanostructure to Graphene

Distance Dependence of the Energy Transfer Rate from a Single Semiconductor Nanostructure to Graphene

Near‐Field Energy Transfer Using Nanoemitters For Optoelectronics

Optical spectroscopy of interlayer coupling in artificially stacked MoS 2 layers

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Optical spectroscopy of interlayer coupling in artificially stacked MoS ₂ layers