Panchromatic small-molecule organic solar cells based on a pyrrolopyrrole aza-BODIPY with a small energy loss
Panchromatic small-molecule organic solar cells based on a pyrrolopyrrole aza-BODIPY with a small energy loss
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DOI：
10.1016/j.dyepig.2022.111020
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发表时间：
2022-12
影响因子：
4.5
通讯作者：
Ru Feng;Tatsuya Mori;Takuma Yasuda;H. Furuta;Soji Shimizu
中科院分区：
文献类型：
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作者：
Ru Feng;Tatsuya Mori;Takuma Yasuda;H. Furuta;Soji Shimizu
小的光子能量损失（Eloss）是实现近红外（NIR）小分子有机太阳能电池（SM-OSCs）的必要条件之一。在此，我们提出了两个新的基于吡咯吡咯偶氮吡啶（PPAB）的全色发色团，TT-2PPABandDFBT-2PPAB，具有用于光伏研究的受体-给体-受体结构。其中，与[6,6]-苯基- c71丁酸甲酯（PC71BM）受体结合后，tt - 2ppab由于损耗为0.48 eV，功率转换效率（PCE）为3.11%，小于0.6 eV的经验极限。基于电化学和理论计算，我们发现基于tt - 2ppab的器件的高效光伏性能可归因于tt - 2ppab的足够深的LUMO能级以使电荷转移到PC71BM。
A small photon energy loss (Eloss) is one of the requisites for achieving near-infrared (NIR) small-molecule organic solar cells (SM-OSCs). Herein, we present two novel pyrrolopyrrole aza-BODIPY (PPAB)-based panchromatic chromophores,TT-2PPABandDFBT-2PPAB, with an acceptor-donor-acceptor configuration for photovoltaic studies. Among them, in combination with [6,6]-phenyl-C71butyric acid methyl ester (PC71BM) acceptor,TT-2PPABexhibits a moderate power conversion efficiency (PCE) of 3.11% due to anElossof 0.48 eV, which is smaller than the empirical limit of 0.6 eV. Based on the electrochemistry and theoretical calculations, we revealed that the efficient photovoltaic performance of theTT-2PPAB-based device can be ascribed to the sufficiently deep LUMO level ofTT-2PPABfor charge transfer to PC71BM.