Abstract
Because of the strong spatial confinement of electronic wave functions and reduced dielectric screening, the effects of carrier-carrier Coulomb interactions are greatly enhanced in semiconductor nanocrystals (NCs) compared with those in bulk materials. These interactions open a highly efficient decay channel via Auger recombination, which represents a dominant recombination pathway for multiexcitons in NCs. Furthermore, strong Coulomb coupling between charge carriers leads to extremely efficient direct photogeneration of multiexcitons by single photons via carrier (or exciton) multiplication. This review focuses on spectral and dynamical properties of multiexcitons in semiconductor NCs. The specific topics discussed here include the structure of NC electronic states, spectral signatures of multiexcitons in transient absorption and photoluminescence, exciton-exciton interaction energies, Auger recombination, and carrier multiplication. This chapter also briefly reviews the implications of multiexciton effects for practical technologies, such as NC lasing and photovoltaics.
Keywords
Auger effectExcitonMultiple exciton generationSemiconductorCharge carrierMaterials sciencePhotoluminescenceCarrier lifetimeAugerOptoelectronicsUltrafast laser spectroscopyBiexcitonLasing thresholdPhotonAtomic physicsQuantum dotPhysicsCondensed matter physicsLaserSiliconOptics
Affiliated Institutions
Related Publications
High Photoluminescence Efficiency and Optically Pumped Lasing in Solution-Processed Mixed Halide Perovskite Semiconductors
The study of the photophysical properties of organic-metallic lead halide perovskites, which demonstrate excellent photovoltaic performance in devices with electron- and hole-ac...
Synthesis of highly luminescent wurtzite CdSe/CdS giant-shell nanocrystals using a fast continuous injection route
We synthesized CdSe/CdS giant-shell nanocrystals, with a CdSecore diameter between 2.8 nm and 5.5 nm, and a CdS shell thickness of up to 7-8 nm (equivalent to about 20 monolayer...
Low-temperature solution-processed wavelength-tunable perovskites for lasing
Low-temperature solution-processed materials that show optical gain and can be embedded into a wide range of cavity resonators are attractive for the realization of on-chip cohe...
Genesis, challenges and opportunities for colloidal lead halide perovskite nanocrystals
Lead halide perovskites (LHPs) in the form of nanometre-sized colloidal crystals, or nanocrystals (NCs), have attracted the attention of diverse materials scientists due to thei...
Optical Gain and Stimulated Emission in Nanocrystal Quantum Dots
The development of optical gain in chemically synthesized semiconductor nanoparticles (nanocrystal quantum dots) has been intensely studied as the first step toward nanocrystal ...
Publication Info
- Year
- 2006
- Type
- review
- Volume
- 58
- Issue
- 1
- Pages
- 635-673
- Citations
- 982
- Access
- Closed
External Links
Social Impact
Altmetric
PlumX Metrics
Social media, news, blog, policy document mentions
Citation Metrics
982
OpenAlex
Cite This
Victor I. Klimov
(2006).
Spectral and Dynamical Properties of Multiexcitons in Semiconductor Nanocrystals.
Annual Review of Physical Chemistry
, 58
(1)
, 635-673.
https://doi.org/10.1146/annurev.physchem.58.032806.104537
Identifiers
- DOI
- 10.1146/annurev.physchem.58.032806.104537