High-efficiency bulk photovoltaic effect with ferroelectric-increased shift current.

ABSTRACT: Bulk photovoltaic (BPV) effect primarily stems from shift currents in symmetry-breaking materials, providing the potential to smash the Shockley-Queisser limit that constrains the performance of conventional p-n junctions-based solar cells. However, limited open circuit voltages (V_oc) or short circuit current densities (J_sc) from BPV devices still cause a low photoelectric conversion efficiency. Here, combining theoretical analysis and experimental evidence, we identify a range of BPV materials where both V_oc and J_sc can be co-optimized, and greatly boost the efficiency through ferroelectric engineered shift current. We select ferroelectric NbOBr₂ as an example and construct a two-dimensional in-plane device with a giant shift current-

SUBMITTER: Feng P 

PROVIDER: S-EPMC12594984 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature