研究目的
To solve the basic problem of low interfacial electron extraction and serious interfacial charge recombination of ETL-free perovskite solar cells by self-assembling ionic liquid onto the surface of conductive substrates.
研究成果
The self-assembly of hydroxylethyl functionalized imidazolium iodide (BIPH-II) on FTO substrates significantly improves the photovoltaic performance of ETL-free PSCs by enhancing electron extraction and reducing interfacial charge recombination. The PCE is nearly doubled from 9.01% to 17.31%, demonstrating the potential of ionic liquid self-assembly as a convenient and effective method for optimizing ETL-free PSCs.
研究不足
The study focuses on the modification of FTO substrates with BIPH-II ionic liquid and its impact on the performance of ETL-free PSCs. The scalability of the self-assembly technique for large-area fabrication and the long-term stability of the devices under operational conditions are areas that may require further investigation.
1：Experimental Design and Method Selection:
The study involves the synthesis of hydroxylethyl functionalized imidazolium iodide (BIPH-II) and its application to modify the surface of conductive substrate (FTO) through self-assembly technique. The methodology includes the determination of single crystal structure, XPS measurement, SKPM, PL spectra, and photovoltaic performance evaluation.
2：Sample Selection and Data Sources:
The samples include FTO substrates, BIPH-II ionic liquid, and perovskite films. Data sources include XPS, SKPM, PL spectra, and J-V curves.
3：List of Experimental Equipment and Materials:
FTO substrates, BIPH-II ionic liquid, perovskite precursor solution, spiro-OMeTAD, Au electrode, XPS, SKPM, PL spectrometer, solar simulator.
4：Experimental Procedures and Operational Workflow:
The FTO substrate is treated with UV-O3, dipped into BIPH-II solution for self-assembly, followed by perovskite layer deposition, HTM layer spin coating, and Au electrode deposition. The devices are then characterized for photovoltaic performance.
5：Data Analysis Methods:
The data analysis includes fitting of XPS spectra, calculation of work function from SKPM, analysis of PL spectra for electron extraction efficiency, and fitting of J-V curves for photovoltaic parameters.
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
