研究目的
Investigating the development of a lead-free solar cell using bismuth triiodide (BiI3) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as electron donor and acceptor to form a binary quasi-bulk heterojunction (BQ-BH) for efficient exciton separation.
研究成果
The study successfully demonstrates an electron donor/acceptor type of binary quasi-bulk heterojunction concept for efficient exciton separation in BiI3-based solar cells, achieving a champion PCE of 1.50%. This approach opens new avenues for improving the performance of Bi-based solar cells by constructing efficient exciton separation junctions with matched band energies.
研究不足
The study notes relatively high dark current density and charge recombination at the PEDOT/BiI3 interface, leading to low Voc. The series resistance is high, and shunt resistance is low, affecting the fill factor. Future work could explore doping BiI3, improving the photoactive layer morphology, and selecting more favorable interfacial layers to enhance performance.
1：Experimental Design and Method Selection:
The study involves the fabrication of an inverted BiI3/PCBM BQ-BH solar cell via a low-temperature solution process. The BiI3 layer is prepared by spin-coating BiI3 solution onto ITO/PEDOT substrate with a toluene-induced anti-solvent process followed by solvent annealing. PCBM is then spin-coated onto the BiI3 layer to form the BQ-BH.
2：Sample Selection and Data Sources:
The samples include BiI3 layers with different thicknesses and PCBM layers with varying concentrations. Data is collected from SEM, AFM, UV-vis absorption spectra, XRD patterns, and KPFM measurements.
3：List of Experimental Equipment and Materials:
Equipment includes a spin coater, SEM (JSM-7100), AFM (Bruker Dimension Icon system), XRD (Burker X-ray Powder Diffractometer), UV-Vis spectrophotometer (Cary 5000), and KPFM system. Materials include BiI3, PCBM, PEDOT, ITO glasses, and solvents like DMF and toluene.
4：Experimental Procedures and Operational Workflow:
The procedure involves spin-coating BiI3 and PCBM layers, followed by characterization and performance evaluation of the solar cells.
5：Data Analysis Methods:
Performance parameters like PCE, Jsc, Voc, and FF are measured using a solar simulator and Keithley 2600 SourceMeter. EQE measurements are conducted using an Oriel Quantum Efficiency Measurement Kit.
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-
Keithley 2600 SourceMeter
2600
Keithley
Current density-voltage characteristic curves measurement
-
JSM-7100
JSM-7100
JEOL
Scanning electron microscopy imaging
-
Bruker Dimension Icon system
Dimension Icon
Bruker
Atomic force microscopy measurements
-
Burker X-ray Powder Diffractometer
D8 advanced eco
Burker
X-ray diffraction patterns
-
UV-Vis spectrophotometer
Cary 5000
Agilent Technologies
Absorption spectra recording
-
Kelvin probe force microscopy
SCM-PIT-V2
Contact potential difference imaging
-
Xenon lamp
300XF-22
Newport
Illumination for KPFM measurements
-
Solar simulator
Newport Oriel Solar 3A
Newport
Performance evaluation of solar cells
-
Oriel Quantum Efficiency Measurement Kit
QEPVSI
Newport
External quantum efficiency measurements
-
登录查看剩余7件设备及参数对照表
查看全部
