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2D II-VI Semiconductor Nanoplatelets: From Material Synthesis to Optoelectronic Integration
Benjamin T Diroll1, Burak Guzelturk2, Hong Po3
1Center for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, Illinois 60439, United States.
Chemical Reviews
|February 1, 2023
Summary
Colloidal II-VI semiconductor nanoplatelets offer narrow, stable emission across a wide spectrum. Their unique quantum confinement and synthesis methods make them ideal for advanced LEDs and lasers.
Area of Science:
- Colloidal semiconductor synthesis
- Nanomaterials science
- Optoelectronics
Background:
- Colloidal semiconductor synthesis has matured, with nanocrystals used in displays.
- II-VI semiconductor nanoplatelets, introduced 15 years ago, offer unique optical properties.
- They bridge the gap between colloidal quantum dots and epitaxial quantum wells.
Purpose of the Study:
- To review synthetic developments, spectroscopic properties, and applications of colloidal II-VI semiconductor nanoplatelets.
- To discuss growth mechanisms enabling tailored nanoplatelet properties.
- To explore carrier relaxation and exciton dynamics in nanoplatelets.
Main Methods:
- Gram-scale synthesis in organic solvents.
- Atomic-scale control of one-dimensional quantum confinement.
- Characterization of optical features and material stability.
Main Results:
- Nanoplatelets exhibit narrowest room-temperature emission over a wide spectral range with good stability.
- Synthesis allows for tailored shapes, compositions, and heterostructures.
- One-dimensional quantum confinement leads to quantum well-like behavior.
Conclusions:
- Colloidal II-VI semiconductor nanoplatelets are promising for pure-color LEDs, lasers, and luminescent concentrators.
- Their unique properties stem from controlled synthesis and quantum confinement.
- Further research into carrier dynamics can optimize their optoelectronic applications.
