Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Department of Applied Chemistry , Tianjin University of Technology , Tianjin 300384 , P. R. China.
Jiangsu Provincial Key Laboratory of Palygorskite Science and Applied Technology, College of Chemical Engineering , Huaiyin Institute of Technology , Huaian 223003 , Jiangsu , P. R. China.
ACS Appl Mater Interfaces. 2018 May 30;10(21):17883-17895. doi: 10.1021/acsami.8b02090. Epub 2018 May 18.
The core plays a crucial role in achieving high performance of linear hole transport materials (HTMs) toward the perovskite solar cells (PSCs). Most studies focused on the development of fused heterocycles as cores for HTMs. Nevertheless, nonfused heterocycles deserve to be studied since they can be easily synthesized. In this work, we reported a series of low-cost triphenylamine HTMs (M101-M106) with different nonfused cores. Results concluded that the introduced core has a significant influence on conductivity, hole mobility, energy level, and solubility of linear HTMs. M103 and M104 with nonfused oligothiophene cores are superior to other HTMs in terms of conductivity, hole mobility, and surface morphology. PSCs based on M104 exhibited the highest power conversion efficiency of 16.50% under AM 1.5 sun, which is comparable to that of spiro-OMeTAD (16.67%) under the same conditions. Importantly, the employment of M104 is highly economical in terms of the cost of synthesis as compared to that of spiro-OMeTAD. This work demonstrated that nonfused heterocycles, such as oligothiophene, are promising cores for high performance of linear HTMs toward PSCs.
核心在实现线性空穴传输材料（HTMs）在钙钛矿太阳能电池（PSCs）中的高性能方面起着至关重要的作用。大多数研究都集中在开发作为 HTMs 核心的稠合杂环上。然而，非稠合杂环也值得研究，因为它们可以很容易地合成。在这项工作中，我们报道了一系列具有不同非稠合核心的低成本三苯胺 HTMs（M101-M106）。结果表明，引入的核心对 HTMs 的电导率、空穴迁移率、能级和溶解度有显著影响。具有非稠合齐聚噻吩核心的 M103 和 M104 在电导率、空穴迁移率和表面形貌方面优于其他 HTMs。基于 M104 的 PSCs 在 AM 1.5 太阳光下表现出最高的功率转换效率为 16.50%，与相同条件下的 spiro-OMeTAD（16.67%）相当。重要的是，与 spiro-OMeTAD 相比，M104 的合成成本在经济上具有很高的优势。这项工作表明，非稠合杂环，如齐聚噻吩，是用于高性能 PSCs 线性 HTMs 的有前途的核心。
