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Beilstein J. Nanotechnol. 2020, 11, 323–337, doi:10.3762/bjnano.11.24
Figure 1: (a) Principle of pump–probe KPFM (pp-KPFM). In conventional KPFM, a sinusoidal ac voltage Vmod of f...
Figure 2: (a) Detail of the spectroscopic sequence implemented for the acquisition of the pp-KPFM signal as a...
Figure 3: (a) Top: chemical structures of PTB7 (electron donor, D) and PC71BM (electron acceptor, A). Bottom:...
Figure 4: (a, b) pp-KPFM single-point spectroscopy of an electrical square-wave signal of 10 µs (pump, amplit...
Figure 5: (a) Plot of the KPFM compensation potential measured at the solar cell cathode as a function of tim...
Figure 6: (a–f) Spectroscopic curves (average of 5 acquisitions) of the pp-KPFM compensation potential as a f...
Figure 7: (a) Topographic (nc-AFM, UHV, 300 K) and (b) KPFM compensation potential images (1 μm × 1 μm, 300 ×...
Figure 8: (a, c, e, g) nc-AFM/KPFM images of the PTB7:PC71BM blend (1 μm × 1 μm, 90 × 90 pixels) acquired dur...
Figure 9: pp-KPFM spectroscopic imaging of the PTB7:PC71BM blend in data-cube mode. Popt = 18.5 mW∙cm−2 (puls...