Fig. 3: The in situ Raman and UV–Vis absorption spectra of the FTM-based films. | Nature Communications

Fig. 3: The in situ Raman and UV–Vis absorption spectra of the FTM-based films.

From: Diffusion interface layer controlling the acceptor phase of bilayer near-infrared polymer phototransistors with ultrahigh photosensitivity

Fig. 3

a In situ Raman spectra of the PDPP3T/PDPP3T:PC61BM bilayers with SVA at different temperatures (PDPP3T-25 °C: the dark line represents the PDPP3T film at 25 °C; PDPP3T:PC61BM-25 °C: the red line represents the PDPP3T:PC61BM film at 25 °C; PDPP3T/PDPP3T:PC61BM bilayers: the blue line represents 25 °C, the brown line represents 70 °C, the orange line represents 80 °C, the magenta line represents 90 °C, and the deep green line represents 100 °C). b Dependence of the normalized PC61BM Raman peak in the PDPP3T/PDPP3T:PC61BM layer on annealing temperature (data from Fig. 3a, ♣ represents the PDPP3T:PC61BM film, ♦ represents the PDPP3T film). c Absorption spectra of the transferred films after removing the films above the PEDOT:PSS layer with different SVA times (0-0 absorption peak at 850 nm, 0-1 absorption peak at 766 nm, 1-0 absorption peak at 334 nm). d Relationship between the normalized PC61BM absorption peak and annealing time (data from Fig. 3c).

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