研究目的
To investigate the side-chain effect on the properties of nonfullerene acceptors by designing and synthesizing three new small molecules based on the benzo[1,2-b:4,5-b’]dithiophene (BDT) fused central core with different side-chains.
研究成果
The properties of small-molecule acceptors can be precisely tuned by adopting the asymmetrical side-chains strategy, opening a new window for designing high-performance acceptors. The COBDT-4Cl achieved a high efficiency of 13.5%, demonstrating the potential of asymmetrical side-chains in enhancing device performance.
研究不足
The study focuses on the side-chain effect on the properties of nonfullerene acceptors, but does not explore the potential of these materials in other applications or under different conditions.
1：Experimental Design and Method Selection:
Three small molecules (DPBDT-4Cl, POBDT-4Cl, COBDT-4Cl) were designed and synthesized with different side-chains on the central BDT unit to study their effects on the properties of nonfullerene acceptors.
2：Sample Selection and Data Sources:
The optical, electrochemical properties, and device performance of the three small molecules were systematically studied.
3：List of Experimental Equipment and Materials:
The devices were fabricated using the conventional configuration of ITO/PEDOT:PSS/PM6:acceptors/C60-bissalt/Ag.
4：Experimental Procedures and Operational Workflow:
The optimal donor:acceptor (D:A) weight ratios were 1:1 for all small molecules, with 1,8-diiodooctane (DIO) additive and thermal annealing treatments employed to improve performance.
5：Data Analysis Methods:
The properties of the small molecules and their device performance were analyzed using UV-vis absorption spectra, cyclic voltammetry, and external quantum efficiency (EQE) measurements.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
