Dual polarization-enabled ultrafast bulk photovoltaic response in van der Waals heterostructures.

ABSTRACT: The bulk photovoltaic effect (BPVE) originating from spontaneous charge polarizations can reach high conversion efficiency exceeding the Shockley-Queisser limit. Emerging van der Waals (vdW) heterostructures provide the ideal platform for BPVE due to interfacial interactions naturally breaking the crystal symmetries of the individual constituents and thus inducing charge polarizations. Here, we show an approach to obtain ultrafast BPVE by taking advantage of dual interfacial polarizations in vdW heterostructures. While the in-plane polarization gives rise to the BPVE in the overlayer, the charge carrier transfer assisted by the out-of-plane polarization further accelerates the interlayer electronic transport and enhances the BPVE. We illustrate the concept in MoS₂/black phosphor

SUBMITTER: Zeng Z 

PROVIDER: S-EPMC11199638 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature