Why is the excited lifetime of pure phosphor more compared to its corresponding composite?

Sumara Khursheed @Sumara_Khursheed2

02 February 2018 0 7K Report

The lifetime reduces when phosphor is embedded in a polymer matrix. Reasons.

Badges
Science topic

More Sumara Khursheed's questions See All

Interpretation of SEM analysis of Polymer/phosphor film.

I am not able to interpret the SEM analysis of my films. Can somebody help me please.

07 August 2017 6,398 4 View

I have doped KCaV04;Sm in PVP but the PL intensity of Nanocomposite is very less compared to the pure Phosphor. What can be the reasons

Intensity of pure phosphor is about 1000 a.u. where that of polymer/phosphor film is about 70 a.u.

06 July 2017 2,355 3 View

Why is the PL intensity of PMMA/KCaVO4;Sm very low compared to Pure KCaVO4;Sm

The PL intensity of pure Phosphor KCaVO4;Sm is about 1000 a.u. whereas that of film is 15 a.u. Is it because PMMA shows resistance to UV radiations.

06 July 2017 4,413 4 View

Does PMMA offer resistance to UV and visible radiations.

I have doped KCaVo4;Sm with PMMA but it has very low intensity as compared to the pure phosphor. Intensity of pure powder is about 1000 a.u. whereas that of film is 15 a.u.

06 July 2017 2,643 4 View

What is the reason for current dropping in OER , LSV curve?

I tried four trials of the same Copper Phosphides sample in Alkaline medium ( 0.5M KOH) with Hg/HgO reference electrode and Pt as counter electrode. I used 0.001 V/s scan rate for first three...

10 August 2024 3,629 1 View

What may be the reasons for failures of Tube toi Tube Sheet Joints in Boiler Drum ?

We have observed that tube to tube sheet joint leaked in our boiler and needs to overcome same by knowing the root cause.

08 August 2024 3,161 0 View

What is the problem with these tissue culture plants?

All plants are green but some of these plants becomes yellow. I did not found any reason. Please help me to find out the real problem.

01 August 2024 589 4 View

Reason for discontinuities in my Band structure?

Hey All! I am wondering what might be wrong with my band structure. I did the calculations using VASP and plotted the results using Origin. Although I have tried changing various input...

25 July 2024 2,920 11 View

Is it fare for editors of reputed Journals to put on hold manuscripts more than six months without review updates, Are they harassing researchers?

It is being seen that Editors of some reputed Journals are putting on hold the manuscripts and not updating review states even passing more than six months from submission. Researchers are...

24 July 2024 8,596 2 View

Ideal tissue thickness for multiple immunolabelling and confocal microscopy?

Hi there! I'm hoping to to look at co-localisation of cytokines and markers of different brain cell types (e.g., neurons, astrocytes, microglia) in juvenile rat brains (postnatal day 28) that have...

23 July 2024 2,844 1 View

Daniel Everett versus Noam Chomsky on Language?

Many have criticized Noam Chomsky’s theory of language (e.g., Pinker as described in Sihombing 2022), but the most effective criticisms have come from Daniel Everett, given that Chomsky (according...

15 July 2024 492 4 View

Has anyone tried freeze flow samples in -80C freezer or liquid nitrogen before processing?

Our lab has some radioactive cell samples that need to be kept frozen for at least 30 days before flow analysis. For some reason, the samples stored in liquid nitrogen did not perform as well as...

15 July 2024 9,975 1 View

My Cyclic voltammetry curve doesn't show cathodic peak of Cu2+ to Cu+. how to solve this problem?

I performed CV of Cu-MOF in a buffer solution of pH 8, and we did not find any peak corresponding to Cu2+ to Cu+. What is the reason behind this? Please give your valuable suggestions.

08 July 2024 2,388 4 View

Hello, I’m growing three species of microalgae under heterotrophic and mixotrophic conditions. Both the two turned yellow?

What could be the reason for mixotrophs to be yellow too instead of green? Thank you

08 July 2024 594 2 View