The band edge luminescence of surface modified CdSe nanocrystallites: Probing the luminescing state

1997 ◽  
Vol 106 (23) ◽  
pp. 9869-9882 ◽  
Author(s):  
M. Kuno ◽  
J. K. Lee ◽  
B. O. Dabbousi ◽  
F. V. Mikulec ◽  
M. G. Bawendi
Keyword(s):  
Band Edge ◽  
Edge Luminescence ◽  
Band Edge Luminescence ◽  
Surface Modified

The Band Edge Luminescence of Surface Modified CdSe Nanocrystallites

1996 ◽  
Vol 452 ◽  
Author(s):  
M. Kuno ◽  
J. K. Lee ◽  
B. O. Dabbousi ◽  
F. V. Mikulec ◽  
M. G. Bawendi
Keyword(s):  
Surface States ◽  
Band Edge ◽  
Trioctylphosphine Oxide ◽  
Band Edge Emission ◽  
Edge Luminescence ◽  
Internal Core ◽  
Band Edge Luminescence ◽  
Surface Modified ◽  
Inorganic Ligands ◽  
Dark Exciton

AbstractWe study the band edge luminescence of CdSe nanocrystallites to determine the origin of this emission. Previous studies have attributed the band edge emission to the recombination of photo-generated carriers trapped in localized surface states. Recently a number of “dark exciton” theories have been proposed which explain the luminescence in terms of recombination through internal core states. To address this issue we modify the surface of CdSe nanocrystallites with a number of organic/inorganic ligands and monitor the effect this has on the energetics of the resonant and non-resonant band edge luminescence. Our results for nanocrystallites passivated with trioctylphosphine oxide (TOPO), ZnS, 4-Picoline, 4-(trifluoromethyl)thiophenol, and tris(2-ethylhexyl)phosphate are in agreement with a dark exciton description of the band edge luminescence.

ChemInform Abstract: NEAR BAND-EDGE LUMINESCENCE IN ZINC SELENIDE GROWN FROM GALLIUM SOLUTION

1979 ◽  
Vol 10 (21) ◽  
Author(s):  
B. J. FITZPATRICK ◽  
R. N. BHARGAVA ◽  
S. P. HERKO ◽  
P. M. HARNACK
Keyword(s):  
Zinc Selenide ◽  
Band Edge ◽  
Near Band Edge ◽  
Edge Luminescence ◽  
Band Edge Luminescence

Influence of Substrate Temperature on the Structure and Band Edge Luminescence of ZnO Thin Films

2009 ◽  
Vol 29 (10) ◽  
pp. 2938-2942
Author(s):  
张栋 Zhang Dong ◽  
王长征 Wang Changzheng ◽  
何英 He Ying
Keyword(s):  
Thin Films ◽  
Substrate Temperature ◽  
Band Edge ◽  
Zno Thin Films ◽  
Edge Luminescence ◽  
Band Edge Luminescence ◽  
Influence Of Substrate

Luminescence in Si/Strained Si1−xGex Heterostructures

1995 ◽  
Vol 379 ◽  
Author(s):  
J.C. Sturm ◽  
A. St. Amour ◽  
Y. Lacroix ◽  
M.L.W. Thewalt
Keyword(s):  
Temperature Dependence ◽  
Room Temperature ◽  
Surface Passivation ◽  
Band Edge ◽  
Strained Si ◽  
Edge Luminescence ◽  
Recent Developments ◽  
High Pump ◽  
Band Edge Luminescence ◽  
First Time

ABSTRACTThis paper quickly reviews the structure of band-edge luminescence in Si/strained Si1−xGex heterostructures, and then focusses on two recent developments -- the origin of “deep” sub-bandgap luminescence which is sometimes observed in structures grown by Molecular Beam Epitaxy (MBE) and the understanding of the temperature dependence of the band-edge luminescence (up to room temperature). Strong evidence will be presented that the origin of the deep luminescence is radiation damage, and that generated defects are segregated or trapped in the SilxGex layers. The modelling of the temperature dependence by twocarrier numerical simulation is presented for the first time. The work and experimental data show convincingly that the strength of the luminescence at high temperature is controlled by recombination at the top silicon surface, which in turn can be controlled by surface passivation. At high pump powers and low temperatures, Auger recombination reduces the lifetime in the Si1−xGex layers, and leads to a luminescence vs. temperature which is flat up to 250 K and which is reduced only by a factor of three at room temperature.

scholarly journals Near band-edge luminescence of semi-insulating undoped gallium arsenide at high levels of excitation

2009 ◽  
Vol 129 (9) ◽  
pp. 1029-1031
Author(s):  
V.F. Kovalenko ◽  
S.V. Shutov ◽  
Ye.A. Baganov ◽  
M.M. Smyikalo
Keyword(s):  
Gallium Arsenide ◽  
Band Edge ◽  
Near Band Edge ◽  
Edge Luminescence ◽  
Band Edge Luminescence

Surface plasmon enhanced band edge luminescence of ZnO nanorods by capping Au nanoparticles

2010 ◽  
Vol 96 (7) ◽  
pp. 071107 ◽  
Author(s):  
C. W. Cheng ◽  
E. J. Sie ◽  
B. Liu ◽  
C. H. A. Huan ◽  
T. C. Sum ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Au Nanoparticles ◽  
Zno Nanorods ◽  
Band Edge ◽  
Edge Luminescence ◽  
Band Edge Luminescence

Origin of the near-band-edge luminescence in MgxZn1−xO alloys

2010 ◽  
Vol 107 (1) ◽  
pp. 013704 ◽  
Author(s):  
Alexander Müller ◽  
Marko Stölzel ◽  
Christof Dietrich ◽  
Gabriele Benndorf ◽  
Michael Lorenz ◽  
...  
Keyword(s):  
Band Edge ◽  
Near Band Edge ◽  
Edge Luminescence ◽  
Band Edge Luminescence
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