2016
DOI: 10.1021/acsenergylett.6b00569
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Energy Transfer in Quantum Dot Solids

Abstract: Understanding the energy flow in quantum dot solids represents an important step toward designing artificial systems with configurable optoelectronic properties. The growing complexity of nanoparticle assemblies and deposition techniques calls for advanced methods of characterization and control of the underlying exciton diffusion, which is pervasive in these materials. Along these lines, the Perspective will review recent strategies for measuring the energy transfer processes in assemblies of semiconductor na… Show more

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Cited by 88 publications
(109 citation statements)
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“…23 These experiments reveal that Förster theory correctly predicts scaling parameters that affect the energy transfer rate in QD solids. 15,16,19,22,26 To understand the dynamics of excitons in QD solids, let us consider a model QD solid system that is illustrated in Figure 1a. This model system includes QDs assembled in a two-dimensional hexagonally closed packed lattice.…”
Section: Model Of Energy Transfer In Quantum Dot Solidsmentioning
confidence: 99%
“…23 These experiments reveal that Förster theory correctly predicts scaling parameters that affect the energy transfer rate in QD solids. 15,16,19,22,26 To understand the dynamics of excitons in QD solids, let us consider a model QD solid system that is illustrated in Figure 1a. This model system includes QDs assembled in a two-dimensional hexagonally closed packed lattice.…”
Section: Model Of Energy Transfer In Quantum Dot Solidsmentioning
confidence: 99%
“…In addition, when the QDs are trapped into solid matrices, their performances, such as PL intensity and lifetime, usually decrease by 10–90% compared to those of QDs dispersed in liquid phases . The degradation of the QD performance has been attributed to i) surface defect generation, ii) interparticle aggregation, and iii) exciton quenching through Förster, Dexter, or tandem energy transfer processes . The dispersion of QDs in liquid phases is also incompatible with the form factors of various devices and is hardly free from liquid leaks.…”
Section: Fitting Parameters Of Time‐resolved Pl Decay Curves Of Greenmentioning
confidence: 99%
“…If there is strong overlap between the absorption and emission spectra of the QDs, the RET efficiency is high. The RET process can be minimized by band engineering through type‐II core/ shell or transition‐metal‐doped QDs, where the emission spectra are more red‐shifted relative to the absorption band . This RET process is further facilitated if there is a size deviation between the QDs, where smaller QDs transfer the energy to the larger particles.…”
Section: How Carrier Dynamics Can Benefit Qdscsmentioning
confidence: 99%
“…The RETp rocess can be minimized by band engineering through type-II core/ shell or transitionmetal-dopedQ Ds, where the emissions pectra are more redshifted relative to the absorption band. [11] This RETp rocess is furtherf acilitated if there is as ize deviation between the QDs, where smaller QDs transfer the energy to the larger particles. This energy transfer due to size deviation has also been used for light harvesting in the quantum-funnel solar cell developed by Kim et al Higher efficiency is achieved through excitonf unnelling due to RET between PbS QDs of different sizes.…”
Section: Energytransfer In Qds and Study Of Electron Transfer Betweenmentioning
confidence: 99%