The development of nanotheranostic agents that integrate diagnosis and therapy for effective personalized precision medicine has obtained tremendous attention in the past few decades. In this report, biocompatible electron donor–acceptor conjugated semiconducting polymer nanoparticles (PPor-PEG NPs) with light-harvesting unit is prepared and developed for highly effective photoacoustic imaging guided photothermal therapy. To the best of our knowledge, it is the first time that the concept of light-harvesting unit is exploited for enhancing the photoacoustic signal and photothermal energy conversion in polymer-based theranostic agent. Combined with additional merits including donor–acceptor pair to favor electron transfer and fluorescence quenching effect after NP formation, the photothermal conversion efficiency of the PPor-PEG NPs is determined to be 62.3%, which is the highest value among reported polymer NPs. Moreover, the as-prepared PPor-PEG NP not only exhibits a remarkable cell-killing ability but also achieves 100% tumor elimination, demonstrating its excellent photothermal therapeutic efficacy. Finally, the as-prepared water-dispersible PPor-PEG NPs show good biocompatibility and biosafety, making them a promising candidate for future clinical applications in cancer theranostics.

The short circuit current density and fill factor are improved in ternary organic solar cell due to the high morphology compatibility.

Bulk-heterojunction organic solar cells (BHJ-OSCs) have attracted tremendous interest in the scientific community, [1-4] owing to their versatile merits, including transparency, [5] flexibility, [6] solution processability, and light weight. In recent years, extensive efforts have been made to improve the photovoltaic performance, [7-11] which has increased the power conversion efficiency (PCE) by over 18% in binary BHJ-OSCs. [12,13] However, the state-of-art photovoltaic performance of BHJ-OSCs still lags behind other competing photovoltaic technologies, such as silicon-based solar cells [14] and perovskite solar cells. [15] To further elevate the PCE of BHJ-OSCs, integrating two binary OSCs into one ternary OSC has been deemed as one of the most effective approaches. [16-27] By tuning the content of the active layer, ternary BHJ-OSCs, comprising either two donors or two acceptors, can produce a remarkable open-circuit voltage (V OC), short-circuit current density (J SC), and fill factor (FF). Moreover, the unique features observed in intrinsic binary OSCs are likely to be inherited in ternary OSCs. Interestingly, the strategy of ternary OSCs

In this study, we developed a new cathodic buffer layer consisting of a cross -linked [6,6]phenyl-C 61 -butyric styryl dendron ester (C-PCBSD) matrix and an ionic FPI dopant. The incorporation of FPI can improve the electron mobility via an anion induced charge transfer (AIET) mechanism while maintaining the solvent-resistant property of the crosslinked layer. The ZnO combined with C-PCBSD/FPI layer can effectively and universally improve the performance of bulk-heterojunction polymer solar cells (BHJPSCs), planar heterojunction polymer solar cells (PHJPSCs), and organic metallohalide perovskite solar cells (OMPSCs). Furthermore, the insertion of C-PCBSD/FPI layer can improve the thermal stability of the device by preventing the residue moisture in ZnO from diffusing into the CH 3 NH 3 PbI 3 layer in OMPSCs.

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