Zhang Ning-Ning, Liu Xiang-Tong, Xu Ke, Liu Ya-Tong, Liu Lin-Xu, Yan Yong
School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252000, China.
Molecules. 2024 Dec 21;29(24):6034. doi: 10.3390/molecules29246034.
Photo-thermo-electric conversion devices represent a promising technology for converting solar energy into electrical energy. Photothermal materials, as a critical component, play a significant role in efficient conversion from solar energy into thermal energy and subsequently electrical energy, thereby directly influencing the overall system's efficiency in solar energy utilization. However, the application of single-component photothermal materials in photo-thermo-electric conversion systems remains limited. The exploration of novel photothermal materials with broad-spectrum absorption, a high photothermal conversion efficiency (PCE), and a robust output power density is highly desired. In this study, we investigated a black cuprous halide compound, [CuClPA] (, = phenazine), which exhibits broad-spectrum absorption extending into the near-infrared (NIR) region. Compound demonstrated a high NIR-I PCE of 50% under irradiation with an 808 nm laser, attributed to the metal-to-ligand charge transfer (MLCT) from the Cu(I) to the ligands and the strong intermolecular π-π interactions among the ligands. Furthermore, the photo-thermo-electric conversion device constructed using compound achieved a notable output voltage of 261 mV and an output power density of 0.92 W/m under the 1 Sun (1000 W/m) xenon lamp.
光热-电转换装置是一种将太阳能转化为电能的很有前景的技术。光热材料作为关键部件，在将太阳能高效转化为热能进而转化为电能的过程中发挥着重要作用，从而直接影响整个系统的太阳能利用效率。然而，单组分光热材料在光热-电转换系统中的应用仍然有限。因此，迫切需要探索具有广谱吸收、高光热转换效率（PCE）和强大输出功率密度的新型光热材料。在本研究中，我们研究了一种黑色卤化亚铜化合物[CuClPA]（，=吩嗪），它表现出延伸至近红外（NIR）区域的广谱吸收。化合物在808 nm激光照射下表现出50%的高近红外-I PCE，这归因于从Cu（I）到配体的金属-配体电荷转移（MLCT）以及配体之间强烈的分子间π-π相互作用。此外，使用化合物构建的光热-电转换装置在1个太阳（1000 W/m）氙灯下实现了261 mV的显著输出电压和0.92 W/m的输出功率密度。
