Fig. 1. Construction of TCHs via visible-light orthogonal photochemistry design.

a Independent chemical reactions of photopolymerization of PEDOT and coupling reaction of phenols with the catalysis of Ru(II)/APS. b Real-time FT-IR characterization of the polymerization of EDOT ([Ru(II)] = 0.33 mM, [APS] = 110 mM, [EDOT] = 46.5 mM) and c rheology measurement of PVA-Ph solution with increasing irradiation time. d Mechanical property and e toughness tests of as-prepared TCHs, respectively. f The digital images of a TCH ribbon powering a commercial LED light. g TCH letters of “N, W, U” were prepared in corresponding molds. The scale bar is 1 cm. All TCHs were prepared at the following condition: [Ru(II)] = 0.33 mM, [APS] = 110 mM, [PVA-Ph] = 10 wt% with the phenol content of 1%, [EDOT] = 93 mM, [TBA] = 3.7 mM, [PSS] = 2 wt%, and TEG/H₂O = 2/3.