Highly efficient and stable organic solar cells achieved by improving exciton diffusion and splitting through a volatile additive-assisted ternary strategy

IF 31.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: R: Reports Pub Date : 2024-07-21 DOI:10.1016/j.mser.2024.100828

Chaoyue Zhao , Yufei Wang , Kangbo Sun , Chuanlin Gao , Chunliang Li , Zezhou Liang , Liangxiang Zhu , Xiaokang Sun , Dan Wu , Tao Yang , Zeguo Tang , Peng You , Chen Xie , Qing Bai , Chao Li , Jicheng Yi , Hanlin Hu , Shunpu Li , He Yan , Guangye Zhang

{"title":"Highly efficient and stable organic solar cells achieved by improving exciton diffusion and splitting through a volatile additive-assisted ternary strategy","authors":"Chaoyue Zhao , Yufei Wang , Kangbo Sun , Chuanlin Gao , Chunliang Li , Zezhou Liang , Liangxiang Zhu , Xiaokang Sun , Dan Wu , Tao Yang , Zeguo Tang , Peng You , Chen Xie , Qing Bai , Chao Li , Jicheng Yi , Hanlin Hu , Shunpu Li , He Yan , Guangye Zhang","doi":"10.1016/j.mser.2024.100828","DOIUrl":null,"url":null,"abstract":"<div><p>The ternary and additive strategy, introducing a third component into a binary blend and add suitable additives, opens a simple and promising avenue to improve the power conversion efficiency (PCE) of organic solar cells (OSCs). This study investigates the optimization of OSCs by introducing volatile additives and a third component, L8-BO-X, which tunes the active layer morphology and improves the performance of the devices. Utilizing various characterization techniques, such as the grazing-incidence wide-angle X-ray scattering (GIWAXS), film-depth-dependent light absorption spectroscopy (FLAS), and the femtosecond-resolved transient absorption (fsTA) spectroscopy, the effects of these adjustment on crystallinity, phase separation, exciton generation, and charge transport in photovoltaic device are explored. The incorporation of the third component and volatile additives results in less anisotropy in molecular orientation and thus faster exciton splitting at the D-A interface, enhanced π-π stacking coherence length and longer exciton lifetime, and eventually an enhanced power conversion efficiency (PCE) of 19.6 % (certified as 19.07 % in the National Institute of Metrology in China) and exceptional photostability, with the devices retaining 82 % efficiency after 1200 hours of continuous light exposure.</p></div>","PeriodicalId":386,"journal":{"name":"Materials Science and Engineering: R: Reports","volume":"160 ","pages":"Article 100828"},"PeriodicalIF":31.6000,"publicationDate":"2024-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Science and Engineering: R: Reports","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0927796X24000585","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The ternary and additive strategy, introducing a third component into a binary blend and add suitable additives, opens a simple and promising avenue to improve the power conversion efficiency (PCE) of organic solar cells (OSCs). This study investigates the optimization of OSCs by introducing volatile additives and a third component, L8-BO-X, which tunes the active layer morphology and improves the performance of the devices. Utilizing various characterization techniques, such as the grazing-incidence wide-angle X-ray scattering (GIWAXS), film-depth-dependent light absorption spectroscopy (FLAS), and the femtosecond-resolved transient absorption (fsTA) spectroscopy, the effects of these adjustment on crystallinity, phase separation, exciton generation, and charge transport in photovoltaic device are explored. The incorporation of the third component and volatile additives results in less anisotropy in molecular orientation and thus faster exciton splitting at the D-A interface, enhanced π-π stacking coherence length and longer exciton lifetime, and eventually an enhanced power conversion efficiency (PCE) of 19.6 % (certified as 19.07 % in the National Institute of Metrology in China) and exceptional photostability, with the devices retaining 82 % efficiency after 1200 hours of continuous light exposure.

查看原文本刊更多论文

通过挥发性添加剂辅助三元策略改善激子扩散和分裂，实现高效稳定的有机太阳能电池

三元和添加剂策略，即在二元共混物中引入第三种成分并添加合适的添加剂，为提高有机太阳能电池（OSC）的功率转换效率（PCE）开辟了一条简单而有前途的途径。本研究通过引入挥发性添加剂和第三种成分 L8-BO-X 来研究如何优化 OSC，从而调整活性层形态并提高器件性能。利用掠入射广角 X 射线散射（GIWAXS）、薄膜深度依赖性光吸收光谱（FLAS）和飞秒分辨瞬态吸收（fsTA）光谱等各种表征技术，探讨了这些调整对光伏器件中结晶度、相分离、激子生成和电荷传输的影响。第三种成分和挥发性添加剂的加入降低了分子取向的各向异性，从而加快了激子在 D-A 界面的分裂速度，增强了 π-π 堆叠相干长度，延长了激子寿命，最终提高了功率转换效率（PCE），达到 19.6%（中国国家计量院认证为 19.07%），并具有优异的光稳定性，器件在连续光照 1200 小时后仍能保持 82% 的效率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materials Science and Engineering: R: Reports 工程技术-材料科学：综合

CiteScore

60.50

自引率

0.30%

发文量

审稿时长

34 days

期刊介绍： Materials Science & Engineering R: Reports is a journal that covers a wide range of topics in the field of materials science and engineering. It publishes both experimental and theoretical research papers, providing background information and critical assessments on various topics. The journal aims to publish high-quality and novel research papers and reviews. The subject areas covered by the journal include Materials Science (General), Electronic Materials, Optical Materials, and Magnetic Materials. In addition to regular issues, the journal also publishes special issues on key themes in the field of materials science, including Energy Materials, Materials for Health, Materials Discovery, Innovation for High Value Manufacturing, and Sustainable Materials development.