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Figure 1

From: Bound exciton and free exciton states in GaSe thin slab

Figure 1

(a) Absorption and PL spectrum of GaSe slab at 10 K. (b) Exciton energy peak position (black squares) as a function of temperature. The solid red line represents the fitting curve by using Varshni empirical relationship (c) Muli-peak fitting of PL spectrum at 10 K and energy of these three peaks are identified as 2.086 eV, 2.064 eV and 2.032 eV, respectively. (d) PL spectrum as a function of pump intensity ranging from 30 uw to 600 uw at 10 K.

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