Related Experiment Video
Updated: Feb 4, 2026
08:30
Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
Published on: March 19, 2017
17.2K
Diboron-Assisted Interfacial Defect Control Strategy for Highly Efficient Planar Perovskite Solar Cells
Yongguang Tu1, Xiaoyu Yang1, Rui Su1
1State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, 100871, China.
Advanced Materials (Deerfield Beach, Fla.)
|October 9, 2018
Summary
A novel diboron-assisted strategy effectively mitigates defects in formamidinium iodide perovskite solar cells. This approach enhances charge-carrier extraction, leading to improved power conversion efficiency and reduced hysteresis.
Area of Science:
- Materials Science
- Photovoltaics
- Solid-State Chemistry
Background:
- Metal halide perovskite films exhibit ionic and polycrystalline characteristics.
- Formamidinium iodide (FAI)-based perovskites are prone to defects from unreacted FAI species within the crystal lattice.
Purpose of the Study:
- To develop a strategy for controlling defects induced by unreacted FAI in perovskite films.
- To improve the performance and stability of planar perovskite solar cells.
Main Methods:
- A diboron compound (C12H10B2O4) was employed to selectively react with unreacted FAI.
- The strategy targeted defects at grain boundaries and surface regions of the perovskite film.
- Characterization of defect densities and recombination processes.
Main Results:
- Reduced defect densities were achieved through the selective reaction of the diboron compound with FAI.
- Nonradiative recombination between the perovskite film and hole-extraction layer was significantly mitigated.
- Improved charge-carrier extraction and a champion power conversion efficiency of 21.11% were obtained.
Conclusions:
- The diboron-assisted strategy effectively controls FAI-induced defects in perovskite films.
- This method enhances solar cell performance, achieving high efficiency and stabilized power output.
- The approach offers a promising route for defect mitigation and device improvement in perovskite solar cells, with negligible hysteresis.
Related Concept Videos
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
48.5K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
48.5K
01:06Interfacial Electrochemical Methods: Overview
879
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
879
01:23Lumber Defects
520
Lumber defects, which can affect both the appearance and structural integrity of wood, include a variety of growth and manufacturing flaws. Growth defects such as knots and knotholes occur where branches were once attached to the tree trunk, with knotholes forming when these knots fall out. Other natural defects include decay and insect damage, which compromise the wood's strength and durability.
Shakes are minor fractures that run along or across the wood's annual rings, while wane is...
Shakes are minor fractures that run along or across the wood's annual rings, while wane is...
520
01:28The Cell Cycle Control System
5.6K
The cell cycle regulation directs how a cell proceeds from one phase to the next and begins mitosis. The cell cycle control system includes intracellular regulatory molecules and external triggers. They provide "stop" or "advance" signals and operate at specific cell cycle stages termed checkpoints to ensure that a particular process is completed before the cell advances to the next phase.
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and...
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and...
5.6K
02:11The Cell Cycle Control System
14.3K
The cell cycle is an organized set of events that leads the cell to divide into two daughter cells, each containing chromosomes identical to the parent cell. It is the cell cycle that leads to the formation of an entire organism from a single-cell zygote. Besides, cell division also functions in the renewal or repair of tissues in adult multicellular eukaryotes. For example, in the bone marrow, the stem cells divide to form new blood cells. Although essential for several functions, cell...
14.3K
01:22Planar Rigid-Body Motion
1.1K
Understanding the movement of a rigid body in planar motion involves recognizing that every particle within this body is traversing a path that maintains a consistent distance from a specific plane. This concept is fundamental in the study of physics and mechanical engineering, and it allows us to comprehend better how objects move in space.
Planar motion is typically divided into three distinct categories. The first is rectilinear translation, demonstrated by a subway train that moves along...
Planar motion is typically divided into three distinct categories. The first is rectilinear translation, demonstrated by a subway train that moves along...
1.1K