Asymmetric Self-Assembled Monolayer as Hole Transport Layer Enables Binary Organic Solar Cells Based on PM6: Y6 with Over 19% Efficiency

• DOI: 10.31635/ccschem.024.202404707
• Publication Date: 2024-08-22T00:29:23Z
• Authors: Zekun Chen; Xiaojun Li; Shucheng Qin; Yufei Gong; Zhe Liu; Meng Yuan; TongLing Liang; Lei Meng; Yongfang Li
• Keywords: HOMO/LUMO; Fluorine; Active layer

Open AccessCCS ChemistryRESEARCH ARTICLES21 Aug 2024Asymmetric Self-Assembled Monolayer as Hole Transport Layer Enables Binary Organic Solar Cells Based on PM6: Y6 with over 19% Efficiency Zekun Chen, Xiaojun Li, Shucheng Qin, Yufei Gong, Zhe Liu, Meng Yuan, TongLing Liang, Lei and Yongfang Li Chen , Qin Gong Liu Yuan Liang Cite this: CCS Chemistry. 2024;0:1–24https://doi.org/10.31635/ccschem.024.202404707 SectionsSupplemental MaterialAboutPDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareFacebookTwitterLinked InEmail The (SAM) based (2-(9H-carbazol-9-yl)ethyl) phosphonic acid (2PACz) derivatives are promising alternative replace PEDOT:PSS for the application hole transport layers (HTLs) in organic solar cells (OSCs). Herein, MeO-4PACz, two new molecules of MeOF-4PACz F-4PACz were designed synthesized by replacing one or methoxy groups MeO-4PACz fluorine atoms respectively. introduction enhances dipole moments SAMs, which is favorable down-shifting work function (WF) ITO/SAM electrodes achieve ideal energy level alignment HOMO donor, increasing intermolecular interaction improve arrangement SAMs ITO surface. Compared asymmetric molecule a substituent replaced atom exhibits more uniform distribution surface, effectively reduces contact defects active layer suppresses nonradiative recombination. In addition, deeper WF ITO/MeOF-4PACz reduced voltage losses. suitable WF-compatibility superior surface uniformity electrode than ITO/MeO-4PACz ITO/F-4PACz lead lower holeinjection barrier suppressed interfacial non-radiative recombination OSCs. Consequently, OSCs PM6:Y6 HTL substantial improvement power conversion efficiency (PCE) from 17.11% device 19.14%. Noteworthy, currently most representative layer, 19.14% record high binary so far. PCE values PM6:BTP-eC9 PM6:CH1007 also significantly improved 19.48% (certified 19.36%) 18.33% respectively, indicates broad compatibility various mainstream systems Overall, this underscores significant impact designing modifying molecular structure SAM HTLs further improving photovoltaic performance Download figure PowerPoint Previous articleNext article FiguresReferencesRelatedDetails Issue AssignmentNot Yet AssignedSupporting Information Copyright & Permissions© 2024 Chinese Chemical Society Downloaded 0 times PDF downloadLoading ...