Pore Formation and Propagation Mechanism in Porus Silicon

1991 ◽  
Vol 256 ◽  
Author(s):  
V. Lehmann ◽  
H. Cerva ◽  
U. Gosele
Keyword(s):  
Porous Structure ◽  
Space Charge ◽  
Space Charge Region ◽  
Formation Process ◽  
Quantum Confinement ◽  
Pore Formation ◽  
Propagation Mechanism ◽  
Porous Structures

ABSTRACTThis paper presents a model of the microporous silicon formation process which is based on hole depletion due to quantum confinement in the porous structure. This model is compared with the formation of larger porous structures (meso-, macroporous) where hole depletion is generated by a space charge region.

scholarly journals Formation and Properties of Porous GaAs

1996 ◽  
Vol 431 ◽  
Author(s):  
P. Schmuki ◽  
D. J. Lockwood ◽  
J. W. Fraser ◽  
M. J. Graham ◽  
H. S. Isaacs
Keyword(s):  
Porous Structure ◽  
Pore Formation ◽  
Surface Defects ◽  
Light Emission ◽  
Porous Structures ◽  
Onset Potential ◽  
Porous Gaas ◽  
Anion Uptake ◽  
Visible Light Emission ◽  
Good Agreement

AbstractPorous structures on n-type GaAs (100) can be grown electrochemically in chloridecontaining solutions. Crystallographic etching of the sample is a precursor stage of the attack. Polarization curves reveal the existence of a critical onset potential for pore formation (PFP). The PFP is strongly dependent on the doping level of the sample and the presence of surface defects. Good agreement between the PFP and the breakdown voltage of the space charge layer is found. Surface analytical investigations by EDX, AES and XPS show that the porous structure consists mainly of GaAs and that anion uptake in the structure can only be observed after attack has been initiated. Photoluminescence measurements reveal – under certain conditions – visible light emission from the porous structure.

Space charge region effects in bidirectional illuminated P3HT:PCBM bulk heterojunction photodetectors

2015 ◽  
Vol 22 ◽  
pp. 29-34 ◽  
Author(s):  
Patric Büchele ◽  
Mauro Morana ◽  
Diego Bagnis ◽  
Sandro Francesco Tedde ◽  
David Hartmann ◽  
...  
Keyword(s):  
Space Charge ◽  
Space Charge Region ◽  
Bulk Heterojunction

Influence of a space charge region on charge carrier kinetics in silicon wafers

2002 ◽  
Vol 91 (11) ◽  
pp. 9147-9150 ◽  
Author(s):  
S. von Aichberger ◽  
O. Abdallah ◽  
F. Wünsch ◽  
M. Kunst
Keyword(s):  
Charge Carrier ◽  
Space Charge ◽  
Space Charge Region ◽  
Silicon Wafers

Surface defect chemistry of Y-substituted and hydrated BaZrO3 with subsurface space-charge regions

2016 ◽  
Vol 4 (19) ◽  
pp. 7437-7444 ◽  
Author(s):  
Jonathan M. Polfus ◽  
Tor S. Bjørheim ◽  
Truls Norby ◽  
Rune Bredesen
Keyword(s):  
Surface Layer ◽  
Space Charge ◽  
Space Charge Region ◽  
First Principles ◽  
Surface Defect ◽  
Surface Defects ◽  
Defect Chemistry ◽  
First Principles Calculations ◽  
Proton Conducting ◽  
Charged Species

First-principles calculations were utilized to elucidate the complete defect equilibria of surfaces of proton conducting BaZrO3, encompassing charged species adsorbed to the surface, defects in the surface layer as well as in the subsurface space-charge region and bulk.

scholarly journals Winter-jujube-derived carbon with self-doped heteroatoms and a hierarchically porous structure for high-performance supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (69) ◽  
pp. 43356-43365 ◽  
Author(s):  
Yuanyuan Li ◽  
Kaiwen Zheng ◽  
Sayyed Asim Ali Shah ◽  
Yizhou Huang ◽  
Yazhou Tian ◽  
...  
Keyword(s):  
Porous Structure ◽  
High Performance ◽  
Porous Structures ◽  
Hierarchically Porous ◽  
Hierarchically Porous Structure

The synthesized JC samples possessed abundant self-doped heteroatoms and hierarchically porous structures (the co-existence of micro-, meso-, and macropores).

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