How can I specifically identify the Lamp peak region in PL spectral graph ?

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Pathik Kumbhakar

It is easy. Your input light peak will be very strong and mostly narrow also it will change its position with the excitation wavelength.

Kanniah RajKumar

Prof., Pathik,

Yes, In the case of crest. But If we go for longer wavelength range in PL spectra, at that time Trough should be like a U type shape. Pl. suggest me more.