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Pursuing Band-like Transport in Colloidal Quantum Dot Assemblies.
Ricky Dwi Septianto1, Dadan Suhendar2, Mohammad Hamzah Fauzi1
1Research Center for Quantum Physics, National Research and Innovation Agency (BRIN), South Tangerang 15314, Indonesia.
The Journal of Physical Chemistry Letters
|April 8, 2026
Summary
Charge-carrier transport in colloidal quantum dot (CQD) solids is crucial for optoelectronics. This perspective explores transport in ordered CQD superlattices, moving beyond traditional hopping mechanisms.
Area of Science:
- Materials Science
- Solid-State Physics
- Nanotechnology
Background:
- Charge-carrier transport in semiconductor colloidal quantum dot (CQD) solids is critical for optoelectronic applications.
- Conventional ligand-capped CQD solids exhibit non-adiabatic hopping transport.
- Recent advances allow CQD self-assembly into ordered superlattices with epitaxial connections.
Purpose of the Study:
- To provide insight into the current understanding of charge-carrier transport in epitaxially connected CQD superlattices.
- To bridge the gap between theoretical expectations and experimental evidence for band-like transport in ordered CQD structures.
Main Methods:
- Review of existing experimental observations and theoretical models.
- Analysis of recent advances in CQD superlattice formation and characterization.
Main Results:
- While band-like transport is expected in ordered CQD superlattices, definitive experimental evidence and a comprehensive theoretical framework are still lacking.
- The focus is shifting from hopping in disordered systems to exploring new transport regimes in ordered assemblies.
Conclusions:
- Understanding charge transport in epitaxially connected CQD superlattices is key to realizing their optoelectronic potential.
- Further research is needed to experimentally validate and theoretically describe band-like transport in these highly ordered nanomaterials.
