研究目的
To develop a novel asymmetric non-fullerene acceptor (T2-OEHRH) for high-performance organic solar cells (OSCs) that can be processed from non-halogenated solvents, aiming to improve solubility and suppress excessive self-aggregation/crystallization without sacrificing optoelectrical properties.
研究成果
The asymmetric T2-OEHRH effectively suppresses excessive self-aggregation/crystallization and improves solubility in non-halogenated solvents without sacrificing optoelectrical properties. The ternary-blend OSCs based on PTB7-Th:EH-IDTBR:T2-OEHRH processed from non-halogenated solvents achieved impressive PCEs of 12.10% and 9.32% in small- and large-area devices, respectively. This work demonstrates the potential of asymmetric alkyl side-chain engineering for developing high-performance and eco-friendly OSCs.
研究不足
The study focuses on the development of a novel asymmetric non-fullerene acceptor and its application in ternary-blend OSCs. The limitations include the need for further optimization of the material synthesis and device fabrication processes to achieve higher efficiencies and scalability for industrial applications.
1：Experimental Design and Method Selection:
The study involved the design and synthesis of a novel asymmetric non-fullerene acceptor (T2-OEHRH) and its comparison with a symmetric counterpart (T2-ORH). The methodology included the fabrication of ternary-blend OSCs using PTB7-Th:EH-IDTBR:T2-OEHRH processed from non-halogenated solvents.
2：Sample Selection and Data Sources:
The materials used included PTB7-Th, EH-IDTBR, and the newly synthesized T2-OEHRH. The solubility and photovoltaic properties of these materials were tested.
3：List of Experimental Equipment and Materials:
The synthesis involved standard chemical reagents and solvents. The photovoltaic devices were fabricated using an inverted device architecture.
4：Experimental Procedures and Operational Workflow:
The synthesis of T2-OEHRH was carried out through a series of chemical reactions. The photovoltaic devices were fabricated by spin-coating and D-bar coating methods.
5：Data Analysis Methods:
The performance of the OSCs was evaluated through current density-voltage (J-V) characteristics, external quantum efficiency (EQE) measurements, and morphological analyses using SEM, AFM, and TEM.
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