Bacteriochlorin aggregates as dopant-free hole-transporting materials for perovskite solar cells
Bacteriochlorin aggregates as dopant-free hole-transporting materials for perovskite solar cells
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菌绿素聚集体作为钙钛矿太阳能电池的无掺杂空穴传输材料
DOI：
10.1016/j.orgel.2022.106596
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发表时间：
2022
影响因子：
3.2
通讯作者：
Wang Xiao-Feng
中科院分区：
文献类型：
--
作者：
Li Na;Wang Baoning;Sasaki Shin-ichi;Miyasaka Tsutomu;Chen Gang;Wang Xiao-Feng
有机-无机杂化钙钛矿太阳能电池（PSC）由于其极低的生产成本和优异的光物理性能，在过去十年中不仅引起了学术界的极大兴趣，而且也引起了工业界对实际应用的极大兴趣。空穴传输层（HTL）作为PSC的重要组成部分，在提升其性能方面发挥着重要作用。在这项工作中，制备了五种具有不同C17-丙酸酯残基特征的细菌叶绿素衍生物，并将它们的J型聚集体作为PSC的HTL进行了研究。经证实，引入的C17-丙酸酯侧链的性质对主要染料单元的电化学性能（例如电子吸收光谱和能级）的影响可以忽略不计。然而，链特征的不同亲脂性、亲水性或疏水性会影响每种染料组分的溶解度，导致其聚集膜的表面形态不同，如 AFM 观察所揭示的。此外，通过旋涂法制备的五种固体薄膜作为HTL表现出不同的电荷提取和传输能力，这得到了光致发光光谱和电化学阻抗谱测量结果的支持，并被认为是PSC性能不同的根本原因。
Organic-inorganic hybrid perovskite solar cells (PSCs) have attracted great interests not only of academic field but also of industrial world toward practical applications in the last decade due to their extremely low production cost and excellent photo-physical properties. Hole-transporting layer (HTL) as an integral component of PSC plays an important role in elevating its performance. In this work, five bacteriochlorophyll-aderivatives characterized by different C17-propionate residue were prepared and theirJ-type aggregates were investigated as HTLs of PSCs. It was confirmed that the nature of the introduced C17-propionate side chains have negligible effects on the electrochemical properties of main dye unit, such as the electronic absorption spectra and energy levels. However, the different lipophilicity, hydrophilicity, or hydrophobicity of chain characters affect the solubility of each dye component, resulting in diverse surface morphologies of their aggregate films as revealed by AFM observations. Furthermore, the five solid films prepared by spin-coating method showed discrepant charge extraction and transport abilities as HTLs, which were supported by both photo luminescence spectra and electrochemical impedance spectroscopy measurement results and were concluded to be the fundamental reason of the different PSC performance.