Resonance-mediated dynamic modulation of perovskite crystallization for efficient and stable solar cells
Mohammed, Omar F.
KAUST DepartmentChemical Science Program
Functional Nanomaterials Lab (FuNL)
KAUST Catalysis Center (KCC)
KAUST Solar Center (KSC)
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Ultrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
Online Publication Date2021-11-05
Print Publication Date2022-02
Embargo End Date2022-11-05
Permanent link to this recordhttp://hdl.handle.net/10754/673324
MetadataShow full item record
AbstractManipulating perovskite crystallization to prepare high-quality perovskite films is the key to achieve highly efficient and stable perovskite solar cells (PSCs). Here, we report a dynamic strategy to modulate perovskite crystallization using a resonance hole-transporting material (HTM) capable of fast self-adaptive tautomerization between multiple electronic states with neutral and charged resonance forms for mediating perovskite crystal growth and defects passivation in situ. This approach, based on resonance variation with self-adaptive molecular interactions between HTM and perovskite, produces high-quality perovskite films with smooth surface, oriented crystallization and low charge recombination, leading to high-performance inverted PSCs with power conversion efficiencies approaching to 22% for small-area devices (0.09 cm2) and up to 19.5% for large-area devices (1.02 cm2). Also, remarkably high stability of the PSCs was observed, retaining over 90%, 88%, or 83% of the initial efficiencies in air with relative humidity of 40∼50%, under continuous one-sun illumination, or at 75°C annealing for 1000 h without encapsulation.
CitationXu, L., Wu, D., Lv, W., Xiang, Y., Liu, Y., Tao, Y., … Huang, W. (2021). Resonance-mediated dynamic modulation of perovskite crystallization for efficient and stable solar cells. Advanced Materials, 2107111. doi:10.1002/adma.202107111