Recently, the surface-enhanced Raman spectroscopy of the adsorption molecule 4-mercaptopyridine (4-MPY) was observed for the first time on the perovskite (CH3NH3PbCl3) single crystal table by Guo Chunlei of the Chinese Academy of Sciences Institute of Optics, Fine Mechanics and Physics. (SERS) signal, enhancement factor up to 10-5. Studies have shown that perovskite materials as a semiconductor material, with SERS activity, the surface of the adsorption molecules can form a new charge transfer state at the interface, so that under the laser irradiation, the interface charge transfer resonance occurs and produce SERS effect. Through further research, we found a convergence point between SERS technology and photoelectric conversion research field, combined the two, expanded the research field of SERS technology, and made SERS technology show a certain potential in the field of photoelectric detection research. Moreover, through this study, it has been found that molecularly sensitized perovskite materials have certain pioneering properties in the field of optoelectronic devices. The results were published in the ACS Photonics magazine (Article ASAP DOI: 10.1021/acsphotonics.8b00152). The first author was assistant researcher Yu Zhi and the author of the communication was Guo Chunlei. This work has been supported by the National Key R&D Program, the National Natural Science Fund Project, and the Jilin Provincial Science and Technology Agency Development Program. Figure 1. SERS spectra of 4-MPY-modified CH3NH3PbCl3 single-crystal perovskites under different wavelengths of laser light (A), schematic diagram of interfacial charge transfer (B). Figure 2. Schematic diagram of a 4-MPY molecularly modified single crystal perovskite photodetector (A), IV response curves of the device at 532 nm, 633 nm, and dark state. UV Stone Slab Special adhesive Heilongjiang Junhe Building Materials Technology Co., Ltd , https://www.junhejiancai.com
