Fig. 4. (a) The line-shape analysis and curve fitting of the normalized BPL spectra under upward bending. Because the existence of mixed phases in the GaSe multilayer two peaks of P1 and P2 can be accomplished for the line-shape fits. (b) The integration of normalized PL intensity of P1 + P2versus bending curvature. (c) The PL main-peak shift (P1) as a function of curvature for the layered GaSe. The red solid line is the fitting result.
