Photoluminescence and its decay of the dye/porous‐silicon composite system

1996 ◽  
Vol 80 (1) ◽  
pp. 490-493 ◽  
Author(s):  
Peng Li ◽  
Qingshan Li ◽  
Yurong Ma ◽  
Rongchuan Fang
Keyword(s):  
Porous Silicon ◽  
Composite System

Preparation and Characterization of CdTe/Porous Silicon System

2010 ◽  
Vol 663-665 ◽  
pp. 64-67
Author(s):  
Xiao Yi Lv ◽  
Wen Jie Chen ◽  
Jun Wei Hou ◽  
Zhen Hong Jia ◽  
Fu Ru Zhong ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Vapor Deposition ◽  
Composite System ◽  
Chemical Vapor ◽  
Photoluminescence Properties ◽  
Standard Pattern ◽  
Xrd Pattern ◽  
Strong Luminescence ◽  
Silicon System

We report the structural and photoluminescence properties of CdTe/Porous silicon (PS) composite system prepared by chemical vapor deposition. The XRD pattern accord with the standard pattern of cadmium telluride of the samples was evaluated and the morphology of CdTe particles was characterized by scanning electron microscopy. The composite sample gives a strong luminescence and the mechanism of photoluminescence with CdTe/PS has also been discussed.

scholarly journals Thermal Elasticity Stresses Study in Composite System ‘Porous Silicon - Liquid’

2015 ◽  
Vol 70 ◽  
pp. 586-589 ◽  
Author(s):  
M. Isaiev ◽  
K. Voitenko ◽  
V. Doroshchuk ◽  
D. Andrusenko ◽  
A. Kuzmich ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Composite System ◽  
Thermal Elasticity

Surface plasmon polaritons in a composite system of porous silicon and gold

2015 ◽  
Vol 49 (4) ◽  
pp. 442-447 ◽  
Author(s):  
J. S. Vainshtein ◽  
D. N. Goryachev ◽  
O. S. Ken ◽  
O. M. Sreseli
Keyword(s):  
Porous Silicon ◽  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Composite System ◽  
Plasmon Polaritons

PHOTOLUMINESCENCE OF NANOCRYSTALLINE CdTe, INTRODUCED INTO POROUS SILICON

2021 ◽  
Vol 56 ◽  
pp. 123-128
Author(s):  
G. A. Pashchenko ◽  
Keyword(s):  
Porous Silicon ◽  
Composite System ◽  
Colloidal Solution ◽  
Mutual Influence ◽  
Planned Change ◽  
Colloidal Synthesis ◽  
Solid Matrix ◽  
Colloidal Solutions ◽  
Cdte Nanoparticles ◽  
The Matrix

A method of colloidal synthesis of monodisperse nanocrystals (NC) with high stability, narrow bands of photoluminescence (PL) and high quantum yield has been developed. The process of colloidal synthesis took place at room temperature and for the passivation of NC used a variety of surfactants. The surface of NC CdTe was modified by introducing them into a matrix, organic or crystalline. In our case, the matrix was porous Silicon (PS), that is a composite structure was formed on the basis of the matrix and NC semiconductor. Nanocomposite structures of PS – NC CdTe were obtained by introducing colloidal solutions of NC CdTe into the solid matrix of PS and subsequent processing at a certain temperature regime. The photoluminescent properties of a composite system in which the matrix is microcrystalline PS and the second component is NC CdTe deposited from a colloidal solution of NC CdTe have been studied. The peculiarity of this system is that both components have PL of different intensities.The large difference in PL intensities and different positions of the radiation bands allowed, comparing the PL spectra of the colloidal solution of NC CdTe, PS and NC CdTe – PS at different stages of introduction of CdTe nanoparticles into the porous Silicon surface, to identify the interaction and mutual influence of the two constituent materials. The main disadvantages of the method are its relative novelty, which leads to the need for empirical selection of some parameters of the synthesis. The planned change of properties of PS and colloidal solutions of NC CdTe by variation of technological methods of synthesis and processing methods will allow to control the physical properties of this composite system and use it to develop new principles of design and creation of new generation sensor devices.

Processing and characterization of YBa2Cu3O7−x/Ag composites

1990 ◽  
Vol 48 (4) ◽  
pp. 46-47
Author(s):  
Jafar Javadpour ◽  
Bradley L. Thiel ◽  
Sarikaya Mehmet ◽  
Ilhan A. Aksay
Keyword(s):  
Composite System ◽  
Precursor Solution ◽  
Microstructural Development ◽  
Superconducting Properties ◽  
Practical Applications ◽  
Nitrate Precursor ◽  
Cold Pressed ◽  
Tape Cast ◽  
Composite Samples

Practical applications of bulk YBa2Cu3O7−x materials have been limited because of their inadequate critical current density (jc) and poor mechanical properties. Several recent reports have indicated that the addition of Ag to the YBa2Cu3O7−x system is beneficial in improving both mechanical and superconducting properties. However, detailed studies concerning the effect of Ag on the microstructural development of the cermet system have been lacking. Here, we present some observations on the microstructural evolution in the YBa2Cu3O7−x/Ag composite system.The composite samples were prepared by mixing various amounts (2.5 - 50 wt%) AgNO3 in the YBa2Cu3O7−x nitrate precursor solution. These solutions were then spray dried and the resulting powders were either cold pressed or tape cast. The microstructures of the sintered samples were analyzed using SEM (Philips 515) and an analytical TEM (Philips 430T).The SEM micrographs of the compacts with 2.5 and 50 wt% Ag addition sintered at 915°C (below the melting point of Ag) for 1 h in air are displayed in Figs. 1 and 2, respectively.

Calculation of exchange energy in quantum dots : application to porous silicon

1993 ◽  
Vol 03 (C5) ◽  
pp. 355-358 ◽  
Author(s):  
G. FISHMAN ◽  
R. ROMESTAIN ◽  
J. C. VIAL
Keyword(s):  
Quantum Dots ◽  
Porous Silicon ◽  
Exchange Energy

ANTI-REFLECTIVE PROPERTIES OF GRADIENT-POROUS SILICON

2017 ◽  
pp. 16-25
Author(s):  
E. A. Gosteva ◽  
V. V. Starkov ◽  
Yu. N. Parhomenko ◽  
M. O. Kah ◽  
I. A. Iwe
Keyword(s):  
Porous Silicon
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