Nonlinear pressure dependence of the direct band gap in adamantine ordered-vacancy compounds

2010 ◽  
Vol 81 (19) ◽  
Author(s):  
F. J. Manjón ◽  
O. Gomis ◽  
P. Rodríguez-Hernández ◽  
E. Pérez-González ◽  
A. Muñoz ◽  
...  
1999 ◽  
Vol 68 (6) ◽  
pp. 1994-1996 ◽  
Author(s):  
Hideo Fujita ◽  
Kenji Yamauchi ◽  
Akihiko Akasaka ◽  
Hiroshi Irie ◽  
Shoji Masunaga

1998 ◽  
Vol 58 (19) ◽  
pp. 12579-12582 ◽  
Author(s):  
M. D. Frogley ◽  
J. L. Sly ◽  
D. J. Dunstan

1986 ◽  
Vol 60 (11) ◽  
pp. 853-856 ◽  
Author(s):  
V. Lemos ◽  
J.R. Moro ◽  
Q.A.G. de Souza ◽  
P. Motisuke

1988 ◽  
Vol 52 (25) ◽  
pp. 2124-2126 ◽  
Author(s):  
R. People ◽  
A. Jayaraman ◽  
K. W. Wecht ◽  
D. L. Sivco ◽  
A. Y. Cho

2013 ◽  
Vol 652-654 ◽  
pp. 527-531 ◽  
Author(s):  
A.N. Alias ◽  
T.I. Tunku Kudin ◽  
Z.M. Zabidi ◽  
M.K. Harun ◽  
Ab Malik Marwan Ali ◽  
...  

The optical absorption spectra of blended poly (N-carbazole) (PVK) with polyvinylpyrrolidone (PVP) in various compositions are investigated. A doctor blade technique was used to coat the blended polymer on a quartz substrate. The electronic parameters such as absorption edge (Ee), allowed direct band gap (Ed), allowed indirect band gap (Ei), Urbach edge (Eu) and steepness parameter (γ) were calculated using Tauc/Davis-Mott Model. The results reveal that the Ee, Ed and Ei increase with increasing of PVP ratio. There also have variation changing in Urbach energy and steepness parameter.


2014 ◽  
Vol 44 (1) ◽  
pp. 167-176 ◽  
Author(s):  
Adit Ghosh ◽  
Chandrika Varadachari
Keyword(s):  
Band Gap ◽  

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