scholarly journals Synthesis of all-inorganic CsPb2Br5 perovskite and determination of its luminescence mechanism

RSC Advances ◽  
2017 ◽  
Vol 7 (85) ◽  
pp. 54002-54007 ◽  
Author(s):  
Jing Li ◽  
Huijie Zhang ◽  
Song Wang ◽  
Debing Long ◽  
Mingkai Li ◽  
...  
Keyword(s):  
Band Edge ◽  
Visible Range ◽  
Band Edge Emission ◽  
Edge Emission

The band-edge emission of CsPb2Br5 was located at 385 nm, not in the visible range as reported in the literature.

scholarly journals Core Nanoparticle Engineering for Narrower and More Intense Band-Edge Emission from AgInS2/GaSx Core/Shell Quantum Dots

Nanomaterials ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1763 ◽  
Author(s):  
Watcharaporn Hoisang ◽  
Taro Uematsu ◽  
Takahisa Yamamoto ◽  
Tsukasa Torimoto ◽  
Susumu Kuwabata
Keyword(s):  
Surface Passivation ◽  
Precursor Solution ◽  
Silver Sulfide ◽  
Band Edge ◽  
Crystal Phase ◽  
Band Edge Emission ◽  
Edge Emission ◽  
Orthorhombic Crystal ◽  
Metal Precursor ◽  
Ag2s Nanoparticles

Highly luminescent silver indium sulfide (AgInS2) nanoparticles were synthesized by dropwise injection of a sulfur precursor solution into a cationic metal precursor solution. The two-step reaction including the formation of silver sulfide (Ag2S) nanoparticles as an intermediate and their conversion to AgInS2 nanoparticles, occurred during the dropwise injection. The crystal structure of the AgInS2 nanoparticles differed according to the temperature of the metal precursor solution. Specifically, the tetragonal crystal phase was obtained at 140 °C, and the orthorhombic crystal phase was obtained at 180 °C. Furthermore, when the AgInS2 nanoparticles were coated with a gallium sulfide (GaSx) shell, the nanoparticles with both crystal phases emitted a spectrally narrow luminescence, which originated from the band-edge transition of AgInS2. Tetragonal AgInS2 exhibited narrower band-edge emission (full width at half maximum, FWHM = 32.2 nm) and higher photoluminescence (PL) quantum yield (QY) (49.2%) than those of the orthorhombic AgInS2 nanoparticles (FWHM = 37.8 nm, QY = 33.3%). Additional surface passivation by alkylphosphine resulted in higher PL QY (72.3%) with a narrow spectral shape.

Stable enhancement of near-band-edge emission of ZnO nanowires by hydrogen incorporation

2010 ◽  
Vol 21 (6) ◽  
pp. 065709 ◽  
Author(s):  
A Dev ◽  
R Niepelt ◽  
J P Richters ◽  
C Ronning ◽  
T Voss
Keyword(s):  
Zno Nanowires ◽  
Band Edge ◽  
Near Band Edge Emission ◽  
Near Band Edge ◽  
Band Edge Emission ◽  
Edge Emission ◽  
Hydrogen Incorporation

Using dispersion theory to interpret the polarization properties of the band-edge emission in GaN crystals

1987 ◽  
Vol 61 (6) ◽  
pp. 381-384
Author(s):  
Bao Qingcheng ◽  
Zhang Fengling ◽  
Li Duolu ◽  
Dai Rensong ◽  
Xu Xurong
Keyword(s):  
Band Edge ◽  
Band Edge Emission ◽  
Dispersion Theory ◽  
Edge Emission

Enhancement of Photoluminescence from Organic and Inorganic Surface Passivated ZnS Quantum Dots

2001 ◽  
Vol 667 ◽  
Author(s):  
Hatim Mohamed El-Khair ◽  
Ling Xu ◽  
Mingha Li ◽  
Yi Ma ◽  
Xinfan Huang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Organic Coating ◽  
Band Edge ◽  
Band Edge Emission ◽  
Trap States ◽  
Edge Enhancement ◽  
Edge Emission ◽  
Inorganic And Organic

ABSTRACTZnS quantum dots (QDs) chemically synthesized in PVP stabilizing medium have been coated with Zn(OH)2, SiO2and polystyrene (PS) shells as inorganic and organic passivation agents. to synthesize ZnS/Zn(OH)2, ZnS/SiO2and ZnS/PS QDs. PL properties of inorganically passivated ZnS/Zn(OH)2 and ZnS/SiO2 had reported band edge enhancement of 8-10 times, while organically passivated ZnS/PS QDs exhibit tremendous enhancement of band edge emission as much as 10-15 times,. Therefore inorganic and organic coating can passivate trap states of different energies on the surface of ZnS QDs.

Enhancement of the near-band-edge emission of CuI by Cl doping

2019 ◽  
Vol 205 ◽  
pp. 337-341 ◽  
Author(s):  
Fengrui Li ◽  
Mu Gu ◽  
Xiaolin Liu ◽  
Shuangqiang Yue ◽  
Jiajie Zhu ◽  
...  
Keyword(s):  
Band Edge ◽  
Near Band Edge Emission ◽  
Near Band Edge ◽  
Band Edge Emission ◽  
Edge Emission

Band-edge emission, defects, morphology and structure of in-doped ZnO nanocrystal films

2019 ◽  
Vol 89 ◽  
pp. 322-328 ◽  
Author(s):  
B. El Filali ◽  
J.A. Jaramillo Gomez ◽  
T.V. Torchynska ◽  
J.L. Casas Espinola ◽  
L. Shcherbyna
Keyword(s):  
Band Edge ◽  
Band Edge Emission ◽  
Edge Emission ◽  
Morphology And Structure ◽  
Nanocrystal Films ◽  
Doped Zno ◽  
Zno Nanocrystal
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