scholarly journals Optical determination of the band gap and band tail of epitaxial Ag2ZnSnSe4 at low temperature

2020 ◽  
Vol 102 (19) ◽  
Author(s):  
Joël Bleuse ◽  
Sylvain Perret ◽  
Yoann Curé ◽  
Louis Grenet ◽  
Régis André ◽  
...  
Keyword(s):  
Low Temperature ◽  
Band Gap ◽  
Band Tail ◽  
Optical Determination

scholarly journals Photoluminescence of 8H-SiC

2013 ◽  
Vol 740-742 ◽  
pp. 347-350 ◽  
Author(s):  
Anne Henry ◽  
Ivan G. Ivanov ◽  
Erik Janzén ◽  
Tomoaki Hatayama ◽  
Hiroshi Yano ◽  
...  
Keyword(s):  
Binding Energy ◽  
Low Temperature ◽  
Band Gap ◽  
Free Exciton ◽  
Photoluminescence Spectroscopy ◽  
Ionization Energies ◽  
Nitrogen Levels ◽  
Excitonic Band ◽  
Exciton Recombination

8H-SiC epilayers grown on small 8H-SiC Lely platelets are investigated optically using photoluminescence spectroscopy. At low temperature the near band gap emission detected in the 2.78 to 2.67 eV range contains sharp lines associated to nitrogen-bound-exciton recombination. Three different no-phonon lines are detected accompanied by their phonon replicas. Free-exciton replicas are also observed which allows the determination of the excitonic band gap. The binding energy of the bound excitons can thus be determined and the ionization energies of the three nitrogen levels in 8H-SiC are estimated and found to be rather shallow compared to the values for other hexagonal polytypes. Additional bound-exciton lines are observed when the experimental photoluminescence temperature is increased.

scholarly journals Optical determination of the width of the band-tail states, and the excited and ground state energies of the principal dosimetric trap in feldspar

2019 ◽  
Vol 125 ◽  
pp. 40-51 ◽  
Author(s):  
Svenja Riedesel ◽  
Georgina E. King ◽  
Amit Kumar Prasad ◽  
Raju Kumar ◽  
Adrian A. Finch ◽  
...  
Keyword(s):  
Ground State ◽  
Band Tail ◽  
Optical Determination ◽  
Ground State Energies

scholarly journals Time-resolved ARPES Determination of a Quasi-Particle Band Gap and Hot Electron Dynamics in Monolayer MoS2

Nano Letters ◽  
2021 ◽  
Vol 21 (17) ◽  
pp. 7363-7370
Author(s):  
Woojoo Lee ◽  
Yi Lin ◽  
Li-Syuan Lu ◽  
Wei-Chen Chueh ◽  
Mengke Liu ◽  
...  
Keyword(s):  
Band Gap ◽  
Hot Electron ◽  
Electron Dynamics ◽  
Monolayer Mos2 ◽  
Quasi Particle ◽  
Time Resolved
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