Size- and Phase-Controlled Nanometer-Thick β-Ga2O3 Films with Green Photoluminescence for Optoelectronic Applications

2021 ◽  
Author(s):  
Nanthakishore Makeswaran ◽  
Debabrata Das ◽  
Vishal Zade ◽  
Paul Gaurav ◽  
V. Shutthanandan ◽  
...  
Keyword(s):  
Optoelectronic Applications ◽  
Green Photoluminescence

Synthesis and optical characterization of stable and highly luminescent poly-(9-vinylcarbazole)-aluminum-tris-(8-hydroxyquinoline) blends

1999 ◽  
Vol 14 (6) ◽  
pp. 2640-2643 ◽  
Author(s):  
M. Allegrini ◽  
A. Arena ◽  
R. Girlanda ◽  
C. Pace ◽  
S. Patanè ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrochemical Method ◽  
Optical Characterization ◽  
Lifetime Measurements ◽  
Optoelectronic Applications ◽  
Green Photoluminescence

An electrochemical method used to obtain aluminum(III)-8 hydroxyquinoline (Alq3) blended into poly(N-vinylcarbazole) (PVK) matrix is described. The PVK-Alq3 blends show an intense green photoluminescence whose intensity increases by adding a small percentage of a substituted coumarin to the PVK-Alq3 solution. The material can easily be spin-coated to obtain homogeneous luminescent thin films suitable for optoelectronic applications. Spectrophotometry in the uv-vis-ir range, photoluminescence, and lifetime measurements are used to characterize the PVK-Alq3 films.

Dibenzochrysene Enables Tightly Controlled Docking and Stabilizes Photoexcited States in Dual-Pore Covalent Organic Frameworks

2019 ◽  
Author(s):  
Torben Sick ◽  
Niklas Keller ◽  
Nicolai Bach ◽  
Andreas Koszalkowski ◽  
Julian Rotter ◽  
...  
Keyword(s):  
Molecular Docking ◽  
Photophysical Properties ◽  
Visible Spectrum ◽  
Large Family ◽  
Building Blocks ◽  
Band Gaps ◽  
Docking Site ◽  
Covalent Organic Frameworks ◽  
Connected Node ◽  
Optoelectronic Applications

Covalent organic frameworks (COFs), consisting of covalently connected organic building units, combine attractive features such as crystallinity, open porosity and widely tunable physical properties. For optoelectronic applications, the incorporation of heteroatoms into a 2D COF has the potential to yield desired photophysical properties such as lower band gaps, but can also cause lateral offsets of adjacent layers. Here, we introduce dibenzo[g,p]chrysene (DBC) as a novel building block for the synthesis of highly crystalline and porous 2D dual-pore COFs showing interesting properties for optoelectronic applications. The newly synthesized terephthalaldehyde (TA), biphenyl (Biph), and thienothiophene (TT) DBC-COFs combine conjugation in the a,b-plane with a tight packing of adjacent layers guided through the molecular DBC node serving a specific docking site for successive layers. The resulting DBC-COFs exhibit a hexagonal dual-pore kagome geometry, which is comparable to COFs containing another molecular docking site, namely 4,4′,4″,4‴-(ethylene-1,1,2,2-tetrayl)-tetraaniline (ETTA). In this context, the respective interlayer distances decrease from about 4.60 Å in ETTA-COFs to about 3.6 Å in DBC-COFs, leading to well-defined hexagonally faceted single crystals sized about 50-100 nm. The TT DBC-COFs feature broad light absorption covering large parts of the visible spectrum, while Biph DBC-COF shows extraordinary excited state lifetimes exceeding 10 ns. In combination with the large number of recently developed linear conjugated building blocks, the new DBC tetra-connected node is expected to enable the synthesis of a large family of strongly p-stacked, highly ordered 2D COFs with promising optoelectronic properties.

Electronic and Optoelectronic Applications Based on ReS 2

2019 ◽  
Vol 13 (6) ◽  
pp. 1800658 ◽  
Author(s):  
Yan Xiong ◽  
HuaWei Chen ◽  
David Wei Zhang ◽  
Peng Zhou
Keyword(s):  
Optoelectronic Applications

Core/Shell Metal Halide Perovskite Nanocrystals for Optoelectronic Applications

2021 ◽  
pp. 2100438
Author(s):  
Chengxi Zhang ◽  
Jiayi Chen ◽  
Lingmei Kong ◽  
Lin Wang ◽  
Sheng Wang ◽  
...  
Keyword(s):  
Metal Halide ◽  
Core Shell ◽  
Perovskite Nanocrystals ◽  
Metal Halide Perovskite ◽  
Halide Perovskite ◽  
Optoelectronic Applications
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