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DongdongMeng

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[交流] 一篇珍贵的文献,收费有可能也下不到的。希望能帮到大家。 已有2人参与

很不好下的文献“Highly Luminescent Lead Bromide Perovskite Nanoparticles Synthesized
with Porous Alumina Media” 既然下到共享一下,希望能帮到各位。
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Changemylifealways&forever!
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Meteorの泪

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正在奋斗的----小星

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小木虫: 金币+0.5, 给个红包,谢谢回帖
感谢分享。
如果可以写一下自己对于这篇文献的介绍之类就更好了。
不要丢失你的理想和良知。http://xny.swpu.edu.cn/lyt/
2楼2013-12-02 11:23:04
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DongdongMeng

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引用回帖:
2楼: Originally posted by Meteorの泪 at 2013-12-02 11:23:04
感谢分享。
如果可以写一下自己对于这篇文献的介绍之类就更好了。

对不起 忘了把摘要给附上了 马上付。
Changemylifealways&forever!
3楼2013-12-03 10:00:46
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DongdongMeng

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Abstract: Nanocrystallinelead bromide perovskite was synthesized by rapidself-organization on a mesoporous aluminum oxidefilm. With UV excitation, thefilm exhibited anintense green emission with a narrow bandwidth. The photoluminescenceintensity is optimizedfor the conditions ofsynthesis and the kind ofmetal
oxide.
High surface areas and activities realized by nanotextured
materials create efficient mediafor energy conversion with use
of small amounts of resources such as metals, semiconductors,
and organic compounds.
1 Among semiconductive material,
metal halide perovskites have been investigated as a lowdimensionallayered compound,inwhich perovskite units are
surrounded by organic methyl- or phenylammonium groups.
These materials possess semiconductivity with band-gap structures confined by the organicmolecule, exhibiting attractive optical and electrical properties due to quantum size effects. To date, quantum wells,2,3
wires, 4 and dots 5,6 characterized as organic-inorganic perovskite compounds have also been synthesized. There are onlyafew reports on zero-dimensional pure perovskite nanocrystalswithout organic insulator layers 7 because it isdifficult on synthesis to control theirdimension. Amonglead halide type perovskites, bulk crystals, CH3NH3-PbX3(X=Br, Cl, and I), 8,9 can be synthesizedfrom CH3NH3X and PbX2 by solid-phase or solution-based self-organization techniques. Such preparation methods, however, have not been successfully applied to nanocrystallization oflead halide perovskite.
In our previous report, we have shownfor thefirst time photoelectric conversion using the perovskite nanocrystals CH3NH3PbBr3 and CH3NH3PbI3 as visiblelight sensitizers to an n-type semiconductor, TiO2. 10 High quantum conversion efficiency,i.e., electroninjectionfrom these perovskites to TiO2 surfaces, was realized byformation of perovskite nanocrystalline particles with a diameter of2-3 nm successfully synthesized by a solution technique. Here, we report fabrication of an efficientlight emission medium created with the CH3NH3PbBr3 nanoparticles. Self-organized withinanoxide mesoporousfilm, the nanocrystals proved to be capableof highintensity, green
photoluminescence. In this study, a thinAl2O3film was chosen
as a mesoporous medium, which, as aninsulator, possess alarge
energy band gap of 8.7 eV
11
and highionization potential
12
so
that photonic energy absorbed by CH3NH3PbBr3 can befully
converted toluminescence.
Alow-viscosity Al2O3paste was prepared by mixing 2.4 g
of Al2O3 nanopowder (spherical particlewith size 40-50 nm,
Wako Pure Chemical), 1.5 mL ofacetylacetone, 3 mL ofpurified
water, 14 mL of ethanol, and 2 g of poly(ethylene glycol)
(average molecular weight: 20000«5000) and subsequent
grinding with an agate mortar. The paste was spin-coated onto
a quartz glass substrate (2.5 cm©2.5 cm) at 4000 rpmfollowed
by sintering at 500 °Cfor 1 hinair. The resultant porous filmis
mostly amorphous and has thickness ofabout 1ˉm as confirmed
by scanning electron microscopy observations. Semiconductor
Changemylifealways&forever!
4楼2013-12-03 10:04:12
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谢谢分享
5楼2013-12-05 10:54:51
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