研究目的
Investigating the effects of different functional groups in phenethylammonium iodide on the interfacial passivation of perovskite solar cells to improve their performance and stability.
研究成果
The study demonstrates that phenethylammonium iodide with electron-donating groups (methoxyl and methyl) presents favorable passivation effects on perovskite solar cells, leading to improved performance and stability. The passivation is attributed to the electrostatic interaction between the benzene ring and undercoordinated Pb2+ ions. The best passivator with -CH3O group achieves a champion PCE of 22.98%, with significant enhancements in PL lifetime, Voc, and device stability.
研究不足
The study focuses on the passivation effects of specific ammonium salts and does not explore the potential of other passivation materials or methods. The thermal stability of the devices is limited by the poor thermal stability of Spiro-OMeTAD.
1：Experimental Design and Method Selection:
The study involved the post-treatment of mixed perovskite films with different ammonium halide salts to study their passivation effects. The methodology included the use of XPS, TOF-SIMS, XRD, GIWAXS, SCLC measurements, PL, TRPL, and IS to characterize the films and devices.
2：Sample Selection and Data Sources:
The perovskite (FAPbI3)1-x(MAPbBr3-yCly)x film was obtained by dropping a mixed solution of FAI, MABr and MACl onto the pre-deposited PbI2 film.
3：List of Experimental Equipment and Materials:
The study used SEM, XPS, TOF-SIMS, XRD, GIWAXS, SCLC, PL, TRPL, and IS for characterization.
4：Experimental Procedures and Operational Workflow:
The ammonium salts dissolved in isopropanol were spin-coated onto the pristine perovskite films and then annealed at 100℃.
5：0℃. Data Analysis Methods:
5. Data Analysis Methods: The analysis involved comparing the passivation effects of different ammonium salts based on their molecular structure and the electron density of the benzene ring.
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
