研究目的
Investigating the relationship between the molecular structure and photovoltaic performance of non-fullerene organic solar cells by introducing an identical benzodithiophene donor unit for polymer donors and small-molecule acceptors.
研究成果
The study demonstrates that the side-chain conjugation strategy, particularly fluorination, can significantly influence the photovoltaic performance of non-fullerene acceptors in OSCs. The ITIC-SF acceptor, featuring a BDT-SF building block, showed superior performance due to weaker bimolecular recombination and more efficient charge transfer and extraction. This work provides valuable insights into the design of high-performance photovoltaic materials.
研究不足
The study focuses on the synthesis and characterization of specific non-fullerene acceptors and their application in OSCs. The findings are limited to the materials and conditions tested, and further optimization may be required for broader applicability.
1：Experimental Design and Method Selection:
The study involved the synthesis of heptacyclic non-fullerene electron acceptors (ITIC2, ITIC-S, and ITIC-SF) using a side-chain conjugation strategy. The photovoltaic performance of these acceptors was evaluated in organic solar cells (OSCs).
2：Sample Selection and Data Sources:
The polymer donor PBDB-T-SF was used in combination with the synthesized acceptors to fabricate OSCs. The optical, thermal, and electrochemical properties of the acceptors were characterized.
3：List of Experimental Equipment and Materials:
Equipment included mass spectrometry and NMR spectroscopy for characterization, and devices for measuring photovoltaic performance. Materials included the synthesized acceptors and the polymer donor PBDB-T-SF.
4：Experimental Procedures and Operational Workflow:
The acceptors were synthesized and characterized. OSCs were fabricated and their performance was measured under simulated AM 1.5G irradiation.
5：5G irradiation.
Data Analysis Methods:
5. Data Analysis Methods: The photovoltaic parameters (Voc, Jsc, FF, and PCE) were analyzed. The charge generation, extraction properties, and recombination were studied through photocurrent density versus effective voltage measurements and light intensity dependence of Jsc.
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
