研究目的
Investigating the enhancement of organic solar cells efficiency by using perylene mono-imide phosphorus salt as cathode interfacial layer.
研究成果
The insertion of PMI-TPP interfacial layer between the ZnO electron transport layer and the BHJ active layer significantly enhanced the photo conductivity and blocked holes injection, leading to an increased PCE of 10.42%. The study demonstrates that PMI-TPP is a promising candidate for CIL material in OSCs due to its strong light absorption ability and good interfacial compatibility with the organic active layer.
研究不足
The study focuses on the application of two specific organic phosphonium bromide salts as CIL materials in OSCs. The scalability of the synthesis process and the long-term stability of the devices were not extensively discussed.
1：Experimental Design and Method Selection:
The study involved the synthesis of two perylene-monoimide (PMI) derived organic phosphonium bromide salts and their application as cathode interlayers (CIL) in bulk heterojunction (BHJ) organic solar cells (OSCs). The performance of these materials was evaluated in both inverted and traditional device structures.
2：Sample Selection and Data Sources:
The PBDB-T:ITIC blend was used as the bulk-heterojunction active layer. The materials' optical properties, energy levels, and photovoltaic performance were measured.
3：List of Experimental Equipment and Materials:
The study utilized cyclic voltammeter for energy level measurements, FESEM for surface morphology analysis, and EDS for elemental distribution analysis.
4：Experimental Procedures and Operational Workflow:
The synthesis of PMI-TPP and PMI-TMOPP, their application as CIL in OSCs, and the evaluation of device performance through J-V characteristics and EQE spectra.
5：Data Analysis Methods:
The photocurrent (Jph) was calculated, and the Jph/Jsat ratios were determined under short-circuit conditions to understand the charge collection efficiency.
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