Size-dependent electronic level structure of InAs nanocrystal quantum dots: Test of multiband effective mass theory

1998 ◽  
Vol 109 (6) ◽  
pp. 2306-2309 ◽  
Author(s):  
U. Banin ◽  
C. J. Lee ◽  
A. A. Guzelian ◽  
A. V. Kadavanich ◽  
A. P. Alivisatos ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Effective Mass ◽  
Level Structure ◽  
Electronic Level ◽  
Size Dependent ◽  
Nanocrystal Quantum Dots

scholarly journals Light management with quantum nanostructured dots-in-host semiconductors

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
M. Alexandre ◽  
H. Águas ◽  
E. Fortunato ◽  
R. Martins ◽  
M. J. Mendes
Keyword(s):  
Quantum Dots ◽  
Energy Level ◽  
Effective Mass ◽  
Potential Barrier ◽  
Level Structure ◽  
Colloidal Quantum Dots ◽  
Absorption Coefficients ◽  
Energy Level Structure ◽  
Bulk Semiconductors ◽  
Light Management

AbstractInsightful knowledge on quantum nanostructured materials is paramount to engineer and exploit their vast gamut of applications. Here, a formalism based on the single-band effective mass equation was developed to determine the light absorption of colloidal quantum dots (CQDs) embedded in a wider bandgap semiconductor host, employing only three parameters (dots/host potential barrier, effective mass, and QD size). It was ascertained how to tune such parameters to design the energy level structure and consequent optical response. Our findings show that the CQD size has the biggest effect on the number and energy of the confined levels, while the potential barrier causes a linear shift of their values. While smaller QDs allow wider energetic separation between levels (as desired for most quantum-based technologies), the larger dots with higher number of levels are those that exhibit the strongest absorption. Nevertheless, it was unprecedently shown that such quantum-enabled absorption coefficients can reach the levels (104–105 cm−1) of bulk semiconductors.

Size-Dependent Exciton Energy of Narrow Band Gap Colloidal Quantum Dots in the Finite Depth Square-Well Effective Mass Approximation

2006 ◽  
Vol 3 (2) ◽  
pp. 269-271 ◽  
Author(s):  
Sotirios Baskoutas ◽  
Andreas F. Terzis ◽  
Wolfram Schommers
Keyword(s):  
Quantum Dots ◽  
Band Gap ◽  
Effective Mass ◽  
Narrow Band ◽  
Finite Depth ◽  
Effective Mass Approximation ◽  
Exciton Energy ◽  
Size Dependent ◽  
Mass Approximation ◽  
Square Well

Using the potential morphing method within the finite depth square-well effective mass approximation, we calculate the exciton energy of narrow band gap colloidal PbS, PbSe, and InAs quantum dots, assuming a size dependent dielectric function. Concerning the behaviour of the effective band gap with the quantum dot radius, our theoretical results agree well with the experimental ones, in contrast with other theoretical models.

scholarly journals Size-Dependent Photoluminescence Efficiency of Silicon Nanocrystal Quantum Dots

2017 ◽  
Vol 121 (41) ◽  
pp. 23240-23248 ◽  
Author(s):  
Yixuan Yu ◽  
Gang Fan ◽  
Andrea Fermi ◽  
Raffaello Mazzaro ◽  
Vittorio Morandi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Silicon Nanocrystal ◽  
Size Dependent ◽  
Nanocrystal Quantum Dots ◽  
Photoluminescence Efficiency

Size-Dependent Photothermal Performance of Silicon Quantum Dots

2021 ◽  
Vol 125 (6) ◽  
pp. 3421-3431
Author(s):  
İrem Nur Gamze Özbilgin ◽  
Batu Ghosh ◽  
Hiroyuki Yamada ◽  
Naoto Shirahata
Keyword(s):  
Quantum Dots ◽  
Silicon Quantum Dots ◽  
Size Dependent

A Nanoscale Adventure with Silicon: Synthesis, Surface Chemistry, and other Surprises

2015 ◽  
Vol 242 ◽  
pp. 383-390
Author(s):  
Md Hosnay Mobarok ◽  
Tapas K. Purkait ◽  
Jonathan G.C. Veinot
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Surface Chemistry ◽  
Research Group ◽  
Size Dependent ◽  
Earth Abundant ◽  
Potential Applications ◽  
Si Quantum Dots

The preparation and surface chemistry Si quantum dots (SiQDs) are currently an intense focus of research because of their size dependent optical properties and many potential applications. SiQDs offer several advantages over other quantum dots; Si is earth abundant, non-toxic and biocompatible. This account briefly highlights recent advancements made by our research group related to the synthesis, functionalization, surface dependent optical properties and applications of SiQDs.

Sign in / Sign up

Export Citation Format

Share Document