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. 2016 Sep 22;6:33890. doi: 10.1038/srep33890

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Copyright © 2016, The Author(s)

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(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.

Inline graphic — (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.