Enhancing stability and performance of pseudo-planar heterojunction organic solar cells using a hindered phenolic antioxidant with over 19% efficiency  

受阻酚类抗氧化剂提高准平面异质结有机太阳能电池的稳定性和性能并获得超过19%效率

作　　者：Qian Wang Shuo Zhao Haojia Ding Peipei Zhu Yuang Fu Yujie Lv Xinhui Lu Haiming Zhu Xunfan Liao Yiwang Chen 王倩;赵烁;丁皓嘉;朱佩佩;付予昂;吕玉洁;路新慧;朱海明;廖勋凡;陈义旺

机构地区：[1]Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education,College of Chemistry and Materials,Jiangxi Normal University,Nanchang 330022,China [2]State Key Laboratory of Modern Optical Instrumentation,Department of Chemistry,Zhejiang University,Hangzhou 310058,China [3]Department of Physics,Chinese University of Hong Kong,Hong Kong 999077,China

出　　处：《Science China Materials》2025年第3期838-849,共12页中国科学(材料科学)(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(NSFC)(22479066 and 52333006);Jiangxi Provincial Natural Science Foundation(20212ACB203005 and 20224ACB214002);the Thousand Talents Plan of Jiangxi Province(jxsq2019101051);the financial support from Research Grants Council(RGC)of Hong Kong(General Research Fund No.14303519).

摘　　要：Although significant advancements have been achieved in the performance of organic solar cells(OSCs),the intrinsic stability of active layer materials and their morphological instability continue to impede their commercial viability.Herein,a strategy of incorporating a hindered phenolic antioxidant AO1010 into polymer donors of pseudo-planar heterojunction(PPHJ)OSCs was put forward to successfully enhance photo-oxidative and morphological stability.AO1010 that features multiple hydroxyl binding sites makes it highly reactive with superoxide radicals,leading to the quenching of radicals and the termination of radical-induced chain degradation reactions,thereby enhancing the intrinsic stability of the material.Besides,due to the excellent thermal stability and significant steric hindrance of AO1010,it can prevent excessive aggregation of donor and acceptor materials,thus improving morphological stability.Moreover,the multiple hydroxyl groups in AO1010 can easily form hydrogen bonds with the fluorine atoms in the renowned donor PM6,enhancing intermolecular interactions.This leads to an increase in crystallinity of PM6,more orderly molecular packing,and improved gradient phase separation morphology,which benefits charge separation and transport.Consequently,compared with the PM6/BTP-eC9 control device,the optimized PPHJ device based on PM6+AO1010/BTP-eC9 achieved a significantly improved PCE of 18.67% with much better stability.Strikingly,AO1010 demonstrates universal applicability for morphology optimization and stability enhancement.When incorporated into the PM6/L8-BO system,it delivered an impressive efficiency of up to 19.03% with excellent stability.This work put forward an effective strategy to improve the morphology and photo-oxidation stability of active layer,paving the way for the accelerated commercialization of OSCs.尽管有机太阳能电池(OSCs)在性能上取得了显著进展,但活性层材料的本征稳定性和形貌稳定性仍然限制其商业化.本文提出在准平面异质结OSCs的聚合物给体中添加受阻型酚类抗氧化剂AO1010,以提升光氧化稳定性和形貌稳定性.AO1010通过多个羟基结合位点与超氧自由基反应,淬灭自由基并终止链式降解反应,从而提高材料的本征稳定性.此外,AO1010优良的热稳定性和空间位阻效应抑制了活性层中给体和受体材料的过度聚集,改善了形貌稳定性.AO1010中的羟基还与明星给体PM6中的氟原子形成氢键,增强了分子间的相互作用,提升了PM6的结晶度和分子堆积有序性,有利于电荷分离和传输.因此,添加AO1010的PM6/L8-BO体系器件效率提高至19.03%,稳定性也显著改善.

关 键 词：organic solar cells pseudo-planar heterojunctions hindered phenolic antioxidant photo-oxidation stability morphological stability 

分 类 号：O62[理学—有机化学]