Compositional optimization of mixed cation Dion-Jacobson perovskites for efficient green light emission

2021 ◽  
Author(s):  
Xinshun Qin ◽  
Fangzhou Liu ◽  
Tik Lun Leung ◽  
Wenting Sun ◽  
Christoper Chang Sing Chan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Light Emitting Diodes ◽  
Light Emission ◽  
Green Light ◽  
Light Emitting ◽  
Mixed Cation ◽  
Green Light Emission

Dion-Jacobson (DJ) perovskites have been demonstrated to be highly promising for improved lifetime and stability of solar cells, but their applications in light emitting diodes (LEDs) have been scarce. A...

scholarly journals Highly pure green light emission of perovskite CsPbBr_3 quantum dots and their application for green light-emitting diodes

2016 ◽  
Vol 24 (13) ◽  
pp. 15071 ◽  
Author(s):  
Cunlong Li ◽  
Zhigang Zang ◽  
Weiwei Chen ◽  
Zhiping Hu ◽  
Xiaosheng Tang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Light Emitting Diodes ◽  
Light Emission ◽  
Green Light ◽  
Light Emitting ◽  
Green Light Emission

CsPbBr3–Cs4PbBr6 composite nanocrystals for highly efficient pure green light emission

Nanoscale ◽  
2019 ◽  
Vol 11 (47) ◽  
pp. 22899-22906 ◽  
Author(s):  
Miao He ◽  
Chunyun Wang ◽  
Jingzhou Li ◽  
Jiang Wu ◽  
Siwei Zhang ◽  
...  
Keyword(s):  
Light Emission ◽  
Light Emitting Diode ◽  
Solution Process ◽  
Green Light ◽  
Inert Gas ◽  
Light Emitting ◽  
Inorganic Perovskite ◽  
Highly Efficient ◽  
Green Light Emission

All-inorganic perovskite CsPbBr3–Cs4PbBr6 composite nanocrystals (NCs) were synthesized via a convenient solution process without inert gas protection and systematically studied as green phosphors for light emitting diode (LED) applications.

Blue Light Emission from Porous Silicon

1992 ◽  
Vol 283 ◽  
Author(s):  
X. Y. Hou ◽  
G. Shi ◽  
W. Wang ◽  
F. L. Zhang ◽  
P. H. Hao ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Blue Light ◽  
Light Emission ◽  
Green Light ◽  
Blue Shift ◽  
Blue Light Emission ◽  
Light Emitting ◽  
Visible Luminescence ◽  
Infrared Reflection ◽  
Green Light Emission

ABSTRACTThrough a post treatment of light emitting porous silicon in boilingwater, a large blue shift of its photoluminescence (PL) spectrum hasbeen observed and a stable blue-green light emission at the peak wavelength down to 500 nm is achieved. The effect of boiling water treatment is suggested to be a kind of oxidation, which could reduce thesize of the Si column, fill up some micropores and strengthen the Siskeleton. The photoluminescence microscopic observation shows that the surface of blue light emitting porous silicon is composed of manysmall uniformly light-emitting domains at the size of several tens of μm. Fourier transform infrared reflection (FTIR) measurements show that the formation of Si-H bonds is not responsible for the visible luminescence in the very thin Si wires.

Ultrapure green light emission in one-dimensional hybrid lead perovskites: achieving recommendation 2020 standard

2021 ◽  
Author(s):  
Chang-Qing Jing ◽  
Qi-Long Liu ◽  
Cheng-Hao Zhao ◽  
Yan-Yu Zhao ◽  
Cheng-Yang Yue ◽  
...  
Keyword(s):  
Light Emission ◽  
Green Light ◽  
Color Purity ◽  
Light Emitting ◽  
One Dimensional ◽  
Green Light Emission

New 1D halide of [TMPDA]2Pb3Br10 displays a sharp green light emission at 526 nm with FWHM of 25 nm, PLQY of 71.95% and color purity of 91.1%, which achieves the Rec. 2020 standard, and represents the purest green light emitting 1D halide up to date.

scholarly journals Phosphorescent Molecularly Doped Light-Emitting Diodes with Blended Polymer Host and Wide Emission Spectra

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Jun Wang ◽  
Jun Gou ◽  
Weizhi Li
Keyword(s):  
Power Efficiency ◽  
High Efficiency ◽  
Light Emission ◽  
Green Light ◽  
Emission Spectra ◽  
Iridium Complex ◽  
Light Emitting ◽  
Host Materials ◽  
Green Light Emission ◽  
Organic Devices

Stable green light emission and high efficiency organic devices with three polymer layers were fabricated using bis[2-(4′-tert-butylphenyl)-1-phenyl-1H-benzoimidazole-N,C2′] iridium(III) (acetylacetonate) doped in blended host materials. The 1 wt% doping concentration showed maximum luminance of 7841 cd/cm2at 25.6 V and maximum current efficiency of 9.95 cd/A at 17.2 V. The electroluminescence spectra of devices indicated two main peaks at 522 nm and 554 nm coming from phosphor dye and a full width at half maximum (FWHM) of 116 nm. The characteristics of using blended host, doping iridium complex, emission spectrum, and power efficiency of organic devices were investigated.

Efficient organic manganese (II) bromide green-light-emitting diodes enabled by manipulating hole and electron transport layer

2021 ◽  
Author(s):  
Hyunsik Im ◽  
Atanu Jana ◽  
Vijaya Gopalan Sree ◽  
QIANKAI BA ◽  
Seong Chan Cho ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Green Light ◽  
Transport Layer ◽  
Lead Free ◽  
Electron Transport Layer ◽  
Flat Panel Displays ◽  
Flat Panel ◽  
Inorganic Hybrid ◽  
Light Emitting ◽  
Light Emitting Devices

Lead-free, non-toxic transition metal-based phosphorescent organic–inorganic hybrid (OIH) compounds are promising for next-generation flat-panel displays and solid-state light-emitting devices. In the present study, we fabricate highly efficient phosphorescent green-light-emitting diodes...

New Results on Electroluminescence from Porous Silicon

1992 ◽  
Vol 283 ◽  
Author(s):  
Peter Steiner ◽  
Frank Kozlowski ◽  
Hermann Sandmaier ◽  
Walter Lang
Keyword(s):  
Porous Silicon ◽  
Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Uv Light ◽  
Green Light ◽  
Light Emitting ◽  
Porous Region ◽  
First Results

ABSTRACTFirst results on light emitting diodes in porous silicon were reported in 1991. They showed a quantum efficiency of 10-7 to 10-5 and an orange spectrum. Over the last year some progress was achieved:- By applying UV-light during the etching blue and green light emitting diodes in porous silicon are fabricated.- When a p/n junction is realized within the porous region, a quantum efficiency of 10-4 is obtained.

scholarly journals Study of Nanostructured Polymeric Composites Used for Organic Light Emitting Diodes and Organic Solar Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Nguyen Nang Dinh ◽  
Do Ngoc Chung ◽  
Tran Thi Thao ◽  
David Hui
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Light Emitting Diodes ◽  
Hole Transport ◽  
Organic Light Emitting Diodes ◽  
Transport Layer ◽  
Nanocomposite Films ◽  
Hole Transport Layer ◽  
Light Emitting ◽  
Organic Light

Polymeric nanocomposite films from PEDOT and MEH-PPV embedded with surface modified TiO2nanoparticles for the hole transport layer and emission layer were prepared, respectively, for organic emitting diodes (OLEDs). The composite of MEH-PPV+nc-TiO2was used for organic solar cells (OSCs). The characterization of these nanocomposites and devices showed that electrical (I-Vcharacteristics) and spectroscopic (photoluminescent) properties of conjugate polymers were enhanced by the incorporation of nc-TiO2in the polymers. The organic light emitting diodes made from the nanocomposite films would exhibit a larger photonic efficiency and a longer lasting life. For the organic solar cells made from MEH-PPV+nc-TiO2composite, a fill factor reached a value of about 0.34. Under illumination by light with a power density of 50 mW/cm2, the photoelectrical conversion efficiency was about 0.15% corresponding to an open circuit voltageVoc= 0.126 V and a shortcut circuit current densityJsc= 1.18 mA/cm2.

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