Fig. 4From: Exploring the Intrinsic Piezofluorochromic Mechanism of TPE-An by STS Technique a I-V curves of TPE-An film on Si substrate. b Normalized conductivity versus voltage curves at different set currents. The given voltage was −1.2 V. The set currents were 600, 800, 1100, 1400, and 1500 pA, respectively. c The level positions of the HOMO and LUMO of TPE-An film at different set currentsBack to article page