Photoluminescence lifetime distributions of amorphous and porous semiconductors, and organic luminescent materials; wideband quadrature frequency resolved spectroscopy extending over 11 decades

2006 ◽  
Author(s):  
T. Aoki ◽  
K. Ikeda ◽  
T. Urashima ◽  
T. Kaneko ◽  
D. Saitou ◽  
...  
Keyword(s):  
Luminescent Materials ◽  
Lifetime Distributions ◽  
Porous Semiconductors ◽  
Photoluminescence Lifetime

Photoluminescence lifetime distributions of chalcogenide glasses obtained by wide-band frequency resolved spectroscopy

2003 ◽  
Vol 326-327 ◽  
pp. 273-278 ◽  
Author(s):  
T. Aoki ◽  
S. Komedoori ◽  
S. Kobayashi ◽  
T. Shimizu ◽  
A. Ganjoo ◽  
...  
Keyword(s):  
Chalcogenide Glasses ◽  
Wide Band ◽  
Lifetime Distributions ◽  
Band Frequency ◽  
Photoluminescence Lifetime

In Situ microscopy of the anodic etching of silicon

1995 ◽  
Vol 53 ◽  
pp. 232-233
Author(s):  
Frances M. Ross ◽  
Peter C. Searson
Keyword(s):  
Composite Structures ◽  
High Surface ◽  
High Surface Area ◽  
Chemical Properties ◽  
Selective Etching ◽  
Silicon On Insulator ◽  
Second Phase ◽  
Porous Layers ◽  
New Class ◽  
Porous Semiconductors

Porous semiconductors represent a relatively new class of materials formed by the selective etching of a single or polycrystalline substrate. Although porous silicon has received considerable attention due to its novel optical properties1, porous layers can be formed in other semiconductors such as GaAs and GaP. These materials are characterised by very high surface area and by electrical, optical and chemical properties that may differ considerably from bulk. The properties depend on the pore morphology, which can be controlled by adjusting the processing conditions and the dopant concentration. A number of novel structures can be fabricated using selective etching. For example, self-supporting membranes can be made by growing pores through a wafer, films with modulated pore structure can be fabricated by varying the applied potential during growth, composite structures can be prepared by depositing a second phase into the pores and silicon-on-insulator structures can be formed by oxidising a buried porous layer. In all these applications the ability to grow nanostructures controllably is critical.

Research progress on organic self-assembling low-dimensional circularly polarized luminescent materials

2020 ◽  
Vol 13 (0) ◽  
pp. 1-11
Author(s):  
WANG Meng-Zhu ◽  
◽  
DENG Yong-Jing ◽  
LIU Shu-Juan ◽  
ZHAO Qiang
Keyword(s):  
Research Progress ◽  
Luminescent Materials ◽  
Circularly Polarized ◽  
Self Assembling ◽  
Low Dimensional

Recent advances in quinazolinones as an emerging molecular platform for luminescent materials and bioimaging

2021 ◽  
Vol 8 (8) ◽  
pp. 1867-1889
Author(s):  
Zhiming Xing ◽  
Wanhui Wu ◽  
Yongxiang Miao ◽  
Yingqun Tang ◽  
Youkang Zhou ◽  
...  
Keyword(s):  
Fluorescent Probes ◽  
Biological Imaging ◽  
Luminescence Properties ◽  
Luminescent Materials ◽  
Future Outlook ◽  
Recent Advances

This review summarized recent advances relating to the luminescence properties of quinazolinones and their applications in fluorescent probes, biological imaging and luminescent materials. Their future outlook is also included.

Multi-Site Cr3+ Occupation Related Broadband NIR Luminescence in Cr3+-doped Li3Mg2NbO6

CrystEngComm ◽  
2021 ◽  
Author(s):  
Fen Xiao ◽  
Chengning Xie ◽  
Shikun Xie ◽  
Rongxi Yi ◽  
Huiling Yuan ◽  
...  
Keyword(s):  
Near Infrared ◽  
Nir Spectroscopy ◽  
Luminescent Materials ◽  
Optical Source ◽  
Nir Emission ◽  
Nir Luminescence

Broadband near infrared (NIR) luminescent materials have attracted great attention recently for the advance smart optical source of NIR spectroscopy. In this work, a broadband NIR emission from 650 nm...

Fluorescent nematic liquid crystalline oligomers with Reversible Texture and Photoluminescence response to Temperature

2021 ◽  
Author(s):  
Congcong Luo ◽  
bing yao ◽  
Hengheng Zhu ◽  
Xi-Hua Du ◽  
Yan Chen ◽  
...  
Keyword(s):  
Information Security ◽  
Liquid Crystalline ◽  
Unique Feature ◽  
External Stimulus ◽  
Luminescent Materials ◽  
Response To Temperature ◽  
Photoluminescence Response

Fluorescent liquid crystalline in luminescent materials have attracted interest for their unique feature of fluorescence in response to external stimulus and their applicability in information security and anti-counterfeiting. Herein, fluorescent...

scholarly journals X-ray-activated, UVA persistent luminescent materials based on Bi-doped SrLaAlO4 for deep-Seated photodynamic activation

2021 ◽  
Vol 129 (12) ◽  
pp. 120901
Author(s):  
Bo-Mei Liu ◽  
Wei-Jiang Gan ◽  
Sun-Qi Lou ◽  
Rui Zou ◽  
Qiang Tang ◽  
...  
Keyword(s):  
Luminescent Materials ◽  
X Ray

scholarly journals Semiparametric likelihood inference for heterogeneous survival data under double truncation based on a Poisson birth process

2021 ◽  
Author(s):  
Achim Dörre
Keyword(s):  
Survival Data ◽  
Process Model ◽  
Optimization Method ◽  
Finite Sample ◽  
Birth Process ◽  
Dimensional Parameter ◽  
Lifetime Distributions ◽  
Computational Performance ◽  
Semiparametric Likelihood ◽  
Double Truncation

AbstractWe study a selective sampling scheme in which survival data are observed during a data collection period if and only if a specific failure event is experienced. Individual units belong to one of a finite number of subpopulations, which may exhibit different survival behaviour, and thus cause heterogeneity. Based on a Poisson process model for individual emergence of population units, we derive a semiparametric likelihood model, in which the birth distribution is modeled nonparametrically and the lifetime distributions parametrically, and define maximum likelihood estimators. We propose a Newton–Raphson-type optimization method to address numerical challenges caused by the high-dimensional parameter space. The finite-sample properties and computational performance of the proposed algorithms are assessed in a simulation study. Personal insolvencies are studied as a special case of double truncation and we fit the semiparametric model to a medium-sized dataset to estimate the mean age at insolvency and the birth distribution of the underlying population.

Cucurbituril Based Luminescent Materials in Aqueous Media and Solid State

2021 ◽  
Author(s):  
Shubhra Kanti Bhaumik ◽  
Rakesh Biswas ◽  
Supratim Banerjee
Keyword(s):  
Solid State ◽  
Aqueous Media ◽  
Luminescent Materials
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