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Table 1 A summarization table of Δd, ΔP, ΔE, and Δλ at different set currents by tunneling theory

From: Exploring the Intrinsic Piezofluorochromic Mechanism of TPE-An by STS Technique

  ΔI 21 ΔI 31 ΔI 41 ΔI 51
Δd (Å) −0.12 −0.25 −0.35 −0.38
ΔP (Pa) 1.38 × 104 2.90 × 104 4.05 × 104 4.38 × 104
ΔE g (eV) −0.57 −0.81 −0.87 −1.11
Δλ (nm) 26.93 40.26 43.81 59.01
  1. Δ I 21= I 2− I 1 , Δ I 31= I 3 − I 1 , ∆I 41= I 4− I 1, ∆I 51= I 5− I 1
  2. d is the tip-surface distance, P is the pressure on the sample’s surface, Eg is the HOMO-LUMO gap, and λ is the wavelength of PL peak