certain wavelength to produce excited electrons. [1,15,16] In addition, the crystal structure, composition, shape, and size of the nano-sized PTMs have been investigated to activate SPR electrons. [17][18][19] To date, SPRbased Au nanoparticles (NPs) have shown the highest PT conversion efficiency (η PT ) of 100%, [20] while hybrid semiconducting polymer ferro-therapeutic agents showed a slightly lower η PT (98.9%). [21] Furthermore, carbon-based nanomaterials and hybrid nanocomposites have been reported with an improved η PT over the years. Although carbonaceous nanomaterials and metallic nanomaterials have been examined by numerous researchers, these materials normally comprise NP-shaped powders and are not readily fabricated into various shapes or thin films with large areas. Additional issues related to inorganic PTMs include biocompatibility and environmental safety.Thus, many organic molecular PTMs (m-PTMs), including molecular dyes such as cyanines (Cys) and croconaines (Crocs), have been investigated, particularly for PTT and photoacoustic therapy (PAT). [22,23] However, to apply m-PTMs in PT devices that require film types, polymeric media are required, and thus the content of m-PTMs in the film is rather limited, to lower η PT from these films. Due to easy processability and low toxicity, polymeric PTMs (p-PTMs) are explored for thin film applications. [24][25][26][27][28][29][30] Furthermore, polymers are intrinsically thermal insulators and flexible. [31] Therefore, recent efforts have been devoted to developing p-PTMs. In particular, conjugated polymers (CPs) with long π-conjugated backbones of contiguous sp 2 -hybridized carbon atoms display high absorption in the visible to NIR region and are easily photoexcited. [4,32] Thus, a variety of CPs, including poly(3,4-ethylenedioxythiophene)s (PEDOTs), [29,30,33,34] polyanilines (PANIs), [35,36] and polypyrroles (PPys) [37][38][39] are potential candidate as p-PTMs. However, NIR energy utilization is impeded by the narrow absorption bandwidth in the visible region and the low charge-carrier mobility of polymers. Therefore, several strategies have been proposed to broaden the absorption spectra: 1) protonic acid doping and oxidative doping of CPs, 2) copolymerization of electronic donoracceptors (D-As), and 3) hybridization with carbonaceous materials, metals, and metal oxides, as reported for PANIs, PPys, PEDOTs, polydopamines (PDAs), and other CPs. [4] While many reviews of PTMs based on inorganic PTMs are available, [1][2][3][4][5][6]15,17,18,40,41] synthesis and PT mechanisms for thin film applications for organic PTMs remain rare. [31,42] Nonetheless, the PT applications using organic PTMs have dramatically With the growth of photoenergy harvesting and thermal engineering, photo thermal materials (PTMs) have attracted substantial interest due to their unique functions such as localized heat generation, spatiotemporal thermal control lability, invisibility, and light harvesting capabilities. In particular, πconjugated organic PTMs show advantages over...