In this contribution, we report a novel pyridinium-pended conjugated polyelectrolyte (DPTFBr) for application in photocatalytic hydrogen evolution and organic solar cells. DPTFBr contains pyridinium salts attached to its backbone, which enable its transition from the pristine state to a radical state in the presence of amines and under illumination via a photo-induced amine doping process. The transition results in apparent shifts in the UV-vis absorption spectrum, electrochemical redox potential, and electron spin resonance of the resulting polymer. The unique properties of DPTFBr facilitate its application in photocatalytic hydrogen evolution with a high photocatalytic hydrogen evolution rate of 7.33 mmol g⁻¹ h⁻¹, which is 63- and 12-fold higher than those of its neutral and oxidized analogues, respectively. Additionally, the excellent interface modification capabilities of the pyridinium side chains in DPTFBr enable efficient electron transport/collection, thus giving rise to high-performance organic solar cells with a power conversion efficiency of over 16%.

中文翻译：

---

吡啶鎓配位的共轭聚电解质，可有效地光催化制氢和有机太阳能电池

在这项贡献中，我们报告了一种新型的吡啶鎓配位共轭聚电解质（DPTFBr），可用于光催化制氢和有机太阳能电池。DPTFBr的主链上附着有吡啶鎓盐，该吡啶鎓盐可使其在胺存在下并通过光诱导的胺掺杂过程在光照下从原始状态转变为自由基状态。该转变导致所得聚合物的紫外可见吸收光谱，电化学氧化还原电势和电子自旋共振发生明显变化。DPTFBr的独特性质使其以7.33 mmol g ^-1 h ^-1的高光催化氢释放速率促进了其在光催化氢释放中的应用。，分别比其中性和氧化类似物高63倍和12倍。此外，DPTFBr中吡啶鎓侧链的出色的界面修饰能力可实现高效的电子传输/收集，从而产生了功率转换效率超过16％的高性能有机太阳能电池。