Sitakanta Panda

9 Questions 9 Answers 0 Followers

Questions related from Sitakanta Panda

How can I resolve the maximum displacement convergence failure while optimizing fluorophore in the ground state?

Dear All, I optimized an organic fluorophore in the ground state using Gaussian 16 program. After optimization, the maximum force, RMS force and RMS displacement were found to be converged....

24 November 2021 4,256 3 View

Why is the charge transfer transitions of Gd3+ not seen in solids?

Hi, Usually, many trivalent lanthanides show a strong CT band (200-300 nm) due to electron transfer from ligand (say O2-) to Ln 4f states. However, in solids, I have observed that Gd3+ does not...

12 January 2020 2,064 0 View

How much energy is released when an electron recombines with a hole while recording TSL and OSL?

Hi, In principle, when TSL or OSL are recorded, electrons are de-trapped from various traps at different activation energy and excited to the conduction band (CB). Eventually, the electron and...

10 December 2019 5,407 1 View

How crystallization energy is related to particle size and doping?

It has been reported that the particle size of Eu-doped Zn2SnO4 is smaller than undoped Zn2SnO4 at a given temperature (1200 0C). The decrease in particle size upon doping has been attributed to...

31 October 2019 6,193 4 View

How can we get the components of both CW-OSL and LM-OSL from the respective OSL spectra?

CW-OSL decays exponentially when stimulated by either Blue LED (465nm) or Green LED (525nm) excitation source of an irradiated sample. The single exponential decay curve, the sum of many first...

02 February 2018 5,386 0 View

How can the quantum efficiency of luminescent material be calculated from their PL and Reflectance spectra?

Hi, I came across the attached journal wherein quantum efficiency of luminescent material has been calculated from their PL and Reflectance spectra as follows: The quantum efficiency of CeO2: x%...

01 January 1970 3,618 4 View

How crystallinity and luminescence efficiency are related?

Suppose I have synthesized three phosphors of a particular luminescent species in three hosts. I observed from XRD patterns that crystallinity in the three host are different and luminescence...

01 January 1970 7,921 10 View

Is only single-phase luminescent phosphors used for LEDs applications?

Hi, Sometimes, we observe secondary phase though very small (say 5-10 %) in PXRD pattern of synthesized luminescent phosphors wchich could be due to the purity (%) of reactants used for synthesis...

01 January 1970 6,776 4 View

What should be the band gap range of efficient phosphors?

Hi, As we know the band gap as well as luminescence increase with the decrease in particle size. On the other hand, nano-phosphors exhibit better luminescence compared to its bulk ones. What are...

01 January 1970 7,120 2 View