scholarly journals Effects of Asymmetric Quantum Wells on the Structural and Optical Properties of InGaN-Based Light-Emitting Diodes

Materials ◽  
2014 ◽  
Vol 7 (5) ◽  
pp. 3758-3771 ◽  
Author(s):  
Chia-Lung Tsai ◽  
Wei-Che Wu
Keyword(s):  
Optical Properties ◽  
Quantum Wells ◽  
Light Emitting Diodes ◽  
Structural And Optical Properties ◽  
Light Emitting ◽  
Asymmetric Quantum

scholarly journals Using Pre-TMIn Treatment to Improve the Optical Properties of Green Light Emitting Diodes

2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
Bing Xu ◽  
Hai Tao Dai ◽  
Shu Guo Wang ◽  
Fu-Chuan Chu ◽  
Chou-Hsiung Huang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Quantum Wells ◽  
Radiative Decay ◽  
Light Emitting Diodes ◽  
Light Output ◽  
Green Light ◽  
Time Resolved ◽  
Light Emitting ◽  
Transmission Electron ◽  
Green Led

We investigated the effects of pre-TMIn treatment on the optical properties of green light emitting diodes (LEDs). Although pre-TMIn treatment did not affect the epitaxial structure of quantum wells, it significantly improved the quality of the surface morphology relative to that of the untreated sample. Indium cluster can be seen by high-resolution transmission electron microscopy (HR-TEM), which is the explanation for the red-shift of photoluminescence (PL). Time-resolved photoluminescence measurements indicated that the sample prepared with pre-TMIn treatment had a shorter radiative decay time. As a result, the light output power of the treated green LED was higher than that of the conventional untreated one. Thus, pre-TMIn treatment appears to be a simple and efficient means of improving the performance of green LEDs.

Structural and optical properties of violet InGaN/AlInGaN light-emitting diodes grown by MOCVD

2006 ◽  
Vol 295 (1) ◽  
pp. 7-11 ◽  
Author(s):  
J.P. Liu ◽  
G.D. Shen ◽  
J.J. Zhu ◽  
S.M. Zhang ◽  
D.S. Jiang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Light Emitting Diodes ◽  
Structural And Optical Properties ◽  
Light Emitting

Direct correlations of structural and optical properties of three-dimensional GaN/InGaN core/shell micro-light emitting diodes

2016 ◽  
Vol 55 (5S) ◽  
pp. 05FJ09 ◽  
Author(s):  
Matin Sadat Mohajerani ◽  
Marcus Müller ◽  
Jana Hartmann ◽  
Hao Zhou ◽  
Hergo-H. Wehmann ◽  
...  
Keyword(s):  
Optical Properties ◽  
Light Emitting Diodes ◽  
Three Dimensional ◽  
Core Shell ◽  
Structural And Optical Properties ◽  
Light Emitting

Hydrothermal synthesis for the enhanced red and green Sr3Y(PO4)3:Eu3+, Tb3+ phosphors

2019 ◽  
Vol 33 (05) ◽  
pp. 1950048 ◽  
Author(s):  
Liyong Wang ◽  
Xue Wang ◽  
Qingwei Song ◽  
Tianying Xie ◽  
Xiaoqing Guo ◽  
...  
Keyword(s):  
Optical Properties ◽  
Reaction Time ◽  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Light Emitting Diodes ◽  
Green Emission ◽  
Structural And Optical Properties ◽  
Light Emitting ◽  
Pl Spectra

A series of enhanced red and green emission phosphors: [Formula: see text] (SYP): [Formula: see text], [Formula: see text] were successfully synthesized via a novel hydrothermal method. The structural and optical properties were investigated through XRD and PL (photoluminescence) measurements. The results of PL spectra revealed that SYP exhibited red and green emission for [Formula: see text], [Formula: see text]-phosphors doped, respectively. In order to obtain optimal phosphors, we proposed the concentration of dopants and the reaction time. Results indicated that enhanced red and green emission phosphors SYP may be potential candidates in light-emitting diodes (LEDs).

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