Industrial Kraft Lignin Based Binary Cathode Interface Layer Enables Enhanced Stability in High Efficiency Organic Solar Cells,Advanced Materials

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Industrial Kraft Lignin Based Binary Cathode Interface Layer Enables Enhanced Stability in High Efficiency Organic Solar Cells
Advanced Materials ( IF 27.4 ) Pub Date : 2023-10-09 , DOI: 10.1002/adma.202307646
Qilun Zhang _{1,

2} , Tiefeng Liu ₁ , Sebastian Wilken ₃ , Shaobing Xiong ₄ , Huotian Zhang ₅ , Iuliana Ribca ₆ , Mingna Liao _{1,

2} , Xianjie Liu ₁ , Renee Kroon _{1,

2} , Simone Fabiano _{1,

2} , Feng Gao ₅ , Martin Lawoko ₆ , Qinye Bao ₄ , Ronald Österbacka ₃ , Mats Johansson ₆ , Mats Fahlman _{1,

2}

Affiliation

Herein, a binary cathode interface layer (CIL) strategy based on the industrial solvent fractionated LignoBoost kraft lignin (KL) is adopted for fabrication of organic solar cells (OSCs). The uniformly distributed phenol moieties in KL enable it to easily form hydrogen bonds with commonly used CIL materials, i.e., bathocuproine (BCP) and PFN-Br, resulting in binary CILs with tunable work function (WF). This work shows that the binary CILs work well in OSCs with large KL ratio compatibility, exhibiting equivalent or even higher efficiency to the traditional CILs in state of art OSCs. In addition, the combination of KL and BCP significantly enhanced OSC stability, owing to KL blocking the reaction between BCP and nonfullerene acceptors (NFAs). This work provides a simple and effective way to achieve high-efficient OSCs with better stability and sustainability by using wood-based materials.

中文翻译：

基于工业硫酸盐木质素的二元阴极界面层可增强高效有机太阳能电池的稳定性

在此，采用基于工业溶剂分馏LignoBoost硫酸盐木质素（KL）的二元阴极界面层（CIL）策略来制造有机太阳能电池（OSC）。 KL 中均匀分布的苯酚部分使其能够轻松与常用的 CIL 材料，即浴铜灵 (BCP) 和 PFN-Br 形成氢键，从而产生具有可调功函数 (WF) 的二元 CIL。这项工作表明，二进制 CIL 在具有大 KL 比兼容性的 OSC 中工作良好，在最先进的 OSC 中表现出与传统 CIL 相当甚至更高的效率。此外，KL 和 BCP 的组合显着增强了 OSC 稳定性，因为 KL 阻断了 BCP 和非富勒烯受体 (NFA) 之间的反应。这项工作提供了一种简单有效的方法，通过使用木质材料来实现具有更好稳定性和可持续性的高效 OSC。

更新日期：2023-10-09

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