Molecular Engineering of Enamine‐Based Hole‐Transporting Materials for High‐Performing Perovskite Solar Cells: Influence of the Central Heteroatom
Molecular Engineering of Enamine‐Based Hole‐Transporting Materials for High‐Performing Perovskite Solar Cells: Influence of the Central Heteroatom
复制标题
用于高性能钙钛矿太阳能电池的烯胺基空穴传输材料的分子工程：中心杂原子的影响
DOI：
10.1002/solr.202200590
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发表时间：
2022
期刊：
影响因子：
7.9
通讯作者：
Wakamiya Atsushi
中科院分区：
文献类型：
--
作者：
Vaitukaityte Deimante;Truong Minh Anh;Rakstys Kasparas;Murdey Richard;Funasaki Tsukasa;Yamada Takumi;Kanemitsu Yoshihiko;Jankauskas Vygintas;Getautis Vytautas;Wakamiya Atsushi
用低成本和简单负担得起的空穴传输材料（HTM）稳定高性能钙钛矿太阳能电池（PSC）已被确定为一项持续的雄心勃勃的挑战。本文中，设计并合成了一系列具有不同中心杂原子（C、N、0和S）和多个烯胺支链的基于烯胺的HTM。深入研究了不同中心杂原子核的影响，包括热，物理和光伏特性。重要的是，分子工程HTM通过单一缩合反应获得，而不需要昂贵的催化剂、惰性反应条件或繁琐的产物纯化。用三苯胺核HTM（V1435）可以实现具有超过20%的功率转换效率（PCE）的PSC，这一结果与螺环-OMeV相当。基于四苯基甲烷（V1431）和二苯硫醚（V1434）核的HTM在类似的器件制造条件下给出稍低的性能。这项工作证明了简单缩合方法的合理分子工程如何在不牺牲PCE的情况下为高性能PSC生产HTM。
Stabilizing the high‐performing perovskite solar cells (PSCs) with low‐cost and simply affordable hole‐transporting materials (HTMs) has been identified as an ongoing ambitious challenge. Herein, a series of enamine‐based HTMs having different central heteroatoms (C, N, O, and S) and a number of enamine branches is designed and synthesized. The impact of varied central heteroatom cores is investigated in‐depth including thermal, photophysical, and photovoltaic properties. Importantly, molecularly engineered HTMs are obtained by a single condensation reaction without the need for expensive catalysts, inert reaction conditions, or tedious product purification. PSCs with a power conversion efficiency (PCE) of over 20% can be realized with the triphenylamine core HTM (V1435), a result comparable with spiro‐OMeTAD. HTMs based on tetraphenylmethane (V1431) and diphenyl sulfide (V1434) cores give a slightly lower performance under similar device fabrication conditions. This work demonstrates how rational molecular engineering of a simple condensation approach can produce HTMs for high‐performing PSCs without sacrificing the PCE.