Question

谁帮我翻译一下这几段话，有些专业术语，翻译工具不行的哦，多谢各位了

So, a separate red light source may have to be used to
compensate LED for the red deficiency of the output light.
On the other hand, for UV LED chip coated by red, green
and blue light-emitting phosphors, a promising white light
generation way, it also desiderates a kind of efficient and
stable red phosphor. However, the red light emitting phosphor
for white LED is commercially still limited to divalent Euion
activated sulfide. Those sulfide phosphors are chemically
unstable and not desirable in efficiency.
In general, the phosphor material for white LED has to
have a sufficient absorption at the emission wavelength of the
blue diode, the quantum yield should be high under UV–vis
excitation and the full width at half maximum of the emission
band should be as small as possible in order to achieve high
luminous output. Based on these options, trivalent Europium
ion (Eu3+) is the preferable choice, which is chosen for the
activator ion in present work.
On the other hand, in view of the host material, for molyb-
date (MoO42−), the central Mo metal ion is coordinated by
four O2− ions in tetrahedral symmetry (Td). Hence, MoO42−
is relatively stable and can be opted for host material.
In this paper, trivalent Europium ion (Eu3+) activated cal-
cium molybdate (CaMoO4) phosphor has been developed by
solid-state reaction in air, and its luminescent properties were
investigated.
the phosphor CaMoO4:Eu3+ was obtained by solid-state
reaction in air. The starting materials MoO3 (L.R.), CaO
(A.R.) and Eu2O3 (4N) were weighed by appropriate stoi-
chiometric ratio, where mole concentration of the activator
Eu ion varied from 18% to 30%. After these powders were
blended and grounded thoroughly in an agate mortar, the ho-
mogeneous mixture obtained was put into an alumina crucible
and calcined in a muffle furnace at the temperature of 700 ◦C
for 3 h into the intentional sample.
The crystal structure of the sample was identified by X-ray
diffraction (XRD), which was recorded on a MXP21VAHF-
M21X X-ray diffraction running Cu K radiation at 40 kV
and 250 mA. A SPEX fluoroMAX-2 fluorescence spectrom-
eter was used to detect the excitation and emission spectra of
the samples.

Answer 1

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现在翻译要花钱的
除非自己懂翻译
要找家专业的翻译公司
这样质量有保证
还能盖章
有些公司不给盖章的

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