Amidinium-Based Ligand: The Next Generation Ligand for Dimensional Heterojunction Perovskite Photovoltaics
Source abstract
Abstract
The operational stability of perovskite solar cells is limited by defects and instabilities at grain boundaries and buried interfaces in three-dimensional absorbers. Forming 3D/low-dimensional (LD) heterojunctions can improve both efficiency and durability, yet most LD layers use ammonium ligands that bind weakly to the lattice and can deprotonate, causing the LD layer to degrade under heat and illumination. This Perspective highlights amidinium-based organic ligands as a promising alternative for constructing more robust LD capping layers. Their planar, multivalent, resonance-stabilized headgroups enable stronger lattice interactions and reduced deprotonation. Although still emerging, tailoring the ligand tail provides a versatile handle to tune dimensionality, interfacial energetics, strain, and electronic coupling toward efficient, stable LD perovskite heterojunction photovoltaics.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Perovskite Materials and Applications · TiO2 Photocatalysis and Solar Cells · Organic Electronics and Photovoltaics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
King Abdullah University of Science and Technology (KAUST)
KAUST Solar Center (KSC), Physical Sciences and Engineering Division (PSE)
School of Science and Engineering
The Chinese University of Hong Kong (Shenzhen)
Henry Royce Institute, Photon Science Institute, Department of Electrical and Electronic Engineering
The University of Manchester
Funding
Engineering and Physical Sciences Research Council · Chinese University of Hong Kong, Shenzhen · King Abdullah University of Science and Technology · National Natural Science Foundation of China · Shenzhen Newly Introduced Specially Appointed Positions · High-level University Special Funding Talent Project
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