Spins in Semiconductor Nanocrystals

Priroda ◽  
2018 ◽  
pp. 22-31
Author(s):  
A. Rodina ◽  
◽  
D. Yakovlev ◽  
Keyword(s):  
Semiconductor Nanocrystals

scholarly journals Dynamic lattice distortions driven by surface trapping in semiconductor nanocrystals

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Burak Guzelturk ◽  
Benjamin L. Cotts ◽  
Dipti Jasrasaria ◽  
John P. Philbin ◽  
David A. Hanifi ◽  
...  
Keyword(s):  
Photon Energy ◽  
Semiconductor Nanocrystals ◽  
Atomic Scale ◽  
Atomistic Simulations ◽  
Shell System ◽  
Structural Distortions ◽  
Colloidal Semiconductor Nanocrystals ◽  
Femtosecond Electron Diffraction ◽  
Structural Deformations ◽  
Nonradiative Processes

AbstractNonradiative processes limit optoelectronic functionality of nanocrystals and curb their device performance. Nevertheless, the dynamic structural origins of nonradiative relaxations in such materials are not understood. Here, femtosecond electron diffraction measurements corroborated by atomistic simulations uncover transient lattice deformations accompanying radiationless electronic processes in colloidal semiconductor nanocrystals. Investigation of the excitation energy dependence in a core/shell system shows that hot carriers created by a photon energy considerably larger than the bandgap induce structural distortions at nanocrystal surfaces on few picosecond timescales associated with the localization of trapped holes. On the other hand, carriers created by a photon energy close to the bandgap of the core in the same system result in transient lattice heating that occurs on a much longer 200 picosecond timescale, dominated by an Auger heating mechanism. Elucidation of the structural deformations associated with the surface trapping of hot holes provides atomic-scale insights into the mechanisms deteriorating optoelectronic performance and a pathway towards minimizing these losses in nanocrystal devices.

scholarly journals Understanding Discrete Growth in Semiconductor Nanocrystals: Nanoplatelets and Magic-Sized Clusters

2021 ◽  
Vol 54 (7) ◽  
pp. 1545-1554
Author(s):  
Andrew B. Pun ◽  
Sergio Mazzotti ◽  
Aniket S. Mule ◽  
David J. Norris
Keyword(s):  
Semiconductor Nanocrystals

Understanding and Exploiting the Interface of Semiconductor Nanocrystals for Light Emissive Applications

ACS Photonics ◽  
2017 ◽  
Vol 4 (3) ◽  
pp. 412-423 ◽  
Author(s):  
Patanjali Kambhampati ◽  
Timothy Mack ◽  
Lakshay Jethi
Keyword(s):  
Semiconductor Nanocrystals

Doping Cu in Semiconductor Nanocrystals: Some Old and Some New Physical Insights

2011 ◽  
Vol 133 (4) ◽  
pp. 1007-1015 ◽  
Author(s):  
Bhupendra B. Srivastava ◽  
Santanu Jana ◽  
Narayan Pradhan
Keyword(s):  
Semiconductor Nanocrystals

Morphology Effect on Zinc Oxide Quantum Photoinitiators for Radical Polymerization

Nanoscale ◽  
2021 ◽  
Author(s):  
Alex Pinkas ◽  
Nir Waiskopf ◽  
Shira Gigi ◽  
Tom Naor ◽  
Almog Layani ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Radical Polymerization ◽  
Semiconductor Nanocrystals ◽  
Viable Alternative ◽  
Morphology Effect

Semiconductor nanocrystals based photoinitiators, quantum PIs, are a viable alternative for organic photoinitiators demonstrating unique advantages, including a broad and tunable excitation window, limited migration, and more. Aiming towards efficient...

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