Bio-Based Tea Polyphenol Modulation of Quasi-2D Perovskite Dimensionality for High-Performance Photomemory.

The high-speed data transmission capability of photomemory is expected to overcome the von Neumann bottleneck, making it a key target for next-generation technological development. With the growing emphasis on environmental sustainability, bio-based materials have attracted increasing attention in recent years due to their rich functional groups, which offer great versatility and application potential. This study employs Ruddlesden-Popper (RP)-phase quasi-2D perovskite (Q-2D PVSK) and bio-based material as the electret layer in non-volatile photomemory, achieving high performance through a simple fabrication process. The results show that the incorporation of bio-based materials leads to devices with high carrier mobility (∼10-2 cm2/V·s), a high Ion/Ioff current ratio (3.19 × 105), and a broad memory window (∼35 V). Moreover, even after multiple cycles, the device maintains a strong photocurrent (∼10-5 A), and long-term retention measurements (∼20,000 s) reveal no significant current degradation. These results validate that the synergistic interaction between bio-based material and Q-2D PVSK significantly enhances both the memory characteristics and the operational stability of the device, demonstrating their strong potential for next-generation nonvolatile photomemory applications.