Revealing the Unusual Efficiency Enhancement of Organic Solar Cells with Polymer-Donor-Treated Cathode Contacts

作     者：Zesheng Liu Yawen Li Xiaojun Zhao Yufan Zhu Yuze Lin Zesheng Liu;Yawen Li;Xiaojun Zhao;Yufan Zhu;Yuze Lin

作者机构：Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of SciencesBeijing100049China 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2022年第40卷第8期

页      面：937-943,I0009页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(No.52173189) 

主　　题：Organic solar cell Electron transport layer Trap density Passivation Hydrogen bond 

摘      要：The metal oxides with low trap density of states as the electron transport layer are crucial for the high performance of the organic solar cells(OSCs).It is universally acknowledged that modifying n-type metal oxide contacts with polymer donors will harm the carrier extraction on account of the mismatched energy ***,we find that modifying interlayer consisting of the alcohol amines with some polymer donor additive can unusually enhance the performance of the *** with triethanolamine(TEA)passivated ZnO,TEA:polymer donor treated ZnO shows lower trap density and enhances electron mobility resulting in higher current density in OSC ***,we reveal that the enhanced oxygen-defect passivation ability of TEA with polymer additive is attributed to the enhanced negative electrostatic potential of TEA owing to the hydrogen bond formation between the polymer and the hydroxyl group in *** strategy that enhancing the negative electrostatic potential of the passivators for improving oxygen defect passivation can be extended to other types of organic electronic devices.