Dear Shrreya,

You can calculate the CCT of your material using the following equation

CCT= (-449n^3) + (3525n^2) - 6823n + 5520.33

where n = (x–xe)/(y–ye) is the inverse slope line and (xe = 0.332, ye = 0.186) is the epicenter. x and y are the coordinates.

CRI can be calculated using Led meter. We have LED meter, but to calculate the CRI we have coat our prepared material on LED and the we have to measure the luminescent material coated LED spectra. The software automatically give the CRI.

If you have prepared LED using your material then we can try to measure the CRI of your LED.

Hello,

This page has a guide for calculating the CRI:

http://www.lrc.rpi.edu/programs/nlpip/lightinganswers/lightsources/appendixB.asp

And there are relevant values here:

Chapter Appendix 7: Calculation of the CIE Colour Rendering Indices

Hope this helps.

The webpage above does not describe the CRI calculation procedure, but only refers to the CIE document where it is published. In addition to the cited Appendix 7, the Wikipedia article on CRI gives the calculation method for determining CRI from a light source spectral power distribution: https://en.wikipedia.org/wiki/Color_rendering_index

Also, you should note that the formula for CCT given above is widely used but can be "off" as much as 2 K between 2856 and 6500 K. Except for very precise colorimetry that is probably more than sufficient accuracy for most applications.

Thanks a lot Rupesh Talewar , I have got the CCT values from the formula you shared.

Annupam, the wikipedia page was good reading material although it still left me wondering how to apply it in my case !

John , The link you provided is extremely useful and I hope , I manage figure out the method to get the CRI values as well soon. I also wanted to ask you if you are aware of any laboratory based experiments to demonstrate the application of delayed phosphorescence in hybrid perovskite systems or any general moisture sensitive semiconducting systems.