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Enhanced Performance via π-Bridge Alteration of Porphyrin-Based Donors for All-Small-Molecule Organic Solar Cells

Chinese Journal of Chemistry 2023年第6期41卷 644-650页

作者： Haojiang Shen Yi Ren Jianfeng Li Yixuan Xu Chenyang Han Wentao Zou Huajun Xu Yanna Sun Yuanyuan Kan Ke Gao School of Materials Science and Engineering Lanzhou Jiaotong UniversityLanzhouGansu 730070China Science Center for Material Creation and Energy Conversion Institute of Frontier and Interdisciplinary ScienceShandong University QingdaoShandong266237China

All-small-molecule organic solar cells (ASM OSCs) are promising for commercial application due to the well-defined chemical structures, convenient purifying process and low batch-to-batch variation. However, the similarity of molecule structures between small molecule donors and acceptors makes a hard regulation of their blend morphology, which will limit the efficiency.

关键词： All-small-molecule organic solar cells Porphyrin-based small molecule donor Binary device π-bridge engineering morphology tuning

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morphology control in high-efficiency all-polymer solar cells

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InfoMat 2022年第4期4卷 48-70页

作者： Kangkang Zhou Kaihu Xian Long Ye School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin UniversityTianjinChina State Key Laboratory of Applied Optics Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchunChina

All-polymer solar cells(All-PSCs)have attracted tremendous research interest in the recent decade due to the great potentials in stretchable electronic applications in terms of long-term stability and mechanical stretchability.Driven by the molecular design of novel polymer acceptors and morphology optimization,the power conversion efficiency(PCE)of All-PSCs has developed rapidly and now exceeded 17%.This review outlines the promising strategies for high-performance All-PSCs from the aspect of morphology control with the motivation to rationally guide the optimization.In this review,we briefly discuss the thermodynamic mixing principles of all-polymer blends and the effects of the molecular structure of conjugated polymers on thin-film morphology in All-PSCs.The crucial role of molecular miscibility in influencing morphological features and performance metrics was highlighted.We also expound on the effective methods of controlling film morphology through properly tuning the aggregation behavior of polymers.In particular,insightful studies on the commonly used naphthalene diimide-based acceptor polymers and the newly emerging polymerized nonfullerene small molecule acceptors(ITIC-series,Y6-series,etc)are discussed in detail.Finally,we present an outlook on the major challenges and the new opportunities of All-PSCs for efficiency breakthroughs targeting 20%.

关键词： aggregated structure all-polymer solar cells morphology tuning photovoltaic polymers polymer acceptor

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