TY - JOUR
T1 - Polarization-modulated programmable photovoltaic performance of a designed ferroelectric heterojunction
AU - Men, Meijiao
AU - Deng, Zunyi
AU - Zhao, Zijing
AU - Liu, Lingchen
AU - Cui, Yuanyuan
AU - Jin, Shuaizhao
AU - Xie, Yiyang
AU - Jiang, Xingan
AU - Ren, Wuyang
AU - Hong, Jiawang
AU - Wu, Jiang
AU - Cheong, Sang Wook
AU - Chang, Pengying
AU - Wang, Lili
AU - Wang, Xueyun
AU - Wang, Xiaolei
N1 - Publisher Copyright:
© The Author(s) 2026.
PY - 2026/12
Y1 - 2026/12
N2 - Conventional photovoltaic devices based on PN or Schottky junctions are inherently constrained by the material band gap, resulting in limited photoelectric conversion efficiency. The van der Waals ferroelectric material CuInP2S6 offers strong potential for efficient photocurrent generation via bulk photovoltaic effect, while heterostructure engineering provides additional degrees of freedom for performance modulation. Yet, the specificity in asymmetric CuInP2S6 heterojunctions remains poorly understood. Here, we design and fabricate an asymmetric photovoltaic device, consisting of Pt/CuInP2S6/Graphene heterostructure. The ferroelectric photovoltaic effect couples with the Cu+ migration dynamics, which could be manipulated by asymmetric interface barriers. Remarkably, the photovoltaic current is increased by 10 times and exhibits a positive-negative switching through polarization modulation. The heterojunction device achieves on-demand photovoltaic programming for in-sensor computing tasks, including edge detection with recognition rate F-score ~ 1 and binary pattern classification with 100% accuracy, which provides new insights for next-generation visual technology.
AB - Conventional photovoltaic devices based on PN or Schottky junctions are inherently constrained by the material band gap, resulting in limited photoelectric conversion efficiency. The van der Waals ferroelectric material CuInP2S6 offers strong potential for efficient photocurrent generation via bulk photovoltaic effect, while heterostructure engineering provides additional degrees of freedom for performance modulation. Yet, the specificity in asymmetric CuInP2S6 heterojunctions remains poorly understood. Here, we design and fabricate an asymmetric photovoltaic device, consisting of Pt/CuInP2S6/Graphene heterostructure. The ferroelectric photovoltaic effect couples with the Cu+ migration dynamics, which could be manipulated by asymmetric interface barriers. Remarkably, the photovoltaic current is increased by 10 times and exhibits a positive-negative switching through polarization modulation. The heterojunction device achieves on-demand photovoltaic programming for in-sensor computing tasks, including edge detection with recognition rate F-score ~ 1 and binary pattern classification with 100% accuracy, which provides new insights for next-generation visual technology.
UR - https://www.scopus.com/pages/publications/105031583952
U2 - 10.1038/s41467-026-68853-y
DO - 10.1038/s41467-026-68853-y
M3 - Article
C2 - 41605937
AN - SCOPUS:105031583952
SN - 2041-1723
VL - 17
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 2096
ER -