摘要
Abstract
Objective To investigate the optoelectronic properties of self-powered sulfonyl-perovskite-materials-based units for wearable biosensors,so as to improve them in environmental stability and low light response.Methods Firstly,two kinds of precursor solutions were prepared by novel sulfonyl ligand 4-(methylsulfonyl)methanamine hydrochloride(MS-PMA)combined with PbI2 and by conventional phenylmethylammine(PMA)combined with PbI2,respectively,and then with the precursor solutions two-dimensional perovskite films were made using the one-step spin-coating method.Secondly,gold electrodes were deposited onto the surface of the perovskite films using vacuum deposition technology to fabricate a photodetector.Finally,instruments and techniques of X-ray diffraction,scanning electron microscopy,atomic force micros-copy,X-ray photoelectron spectroscopy and in-situ optical analysis were used to compare the effects of the MS-PMA ligand and the PMA ligand on the crystallinity and defect density of perovskites and low light response of photodetectors.Results The MS-PMA ligand gained advantages over the PMA ligand in slowing the crystallization rate of the perovskite,promoting the passivation of lattice vacancies,reducing the defects and improving the quality of the perovskite film.At an irradiance of 0.022 6 mW/cm²the MS-PMA-based photodetector exhibited a responsivity of 968 mA/W,a specific detec-tion rate of 2.0×10¹¹Jones and an external quantum efficiency of 267%,with the low light response increased significantly.Conclusion The MS-PMA ligand effectively enhances the environmental stability and light-to-electricity conversion effi-ciency of two-dimensional perovskite materials,providing a solution for sustainable power supply of wearable biosensors.[Chinese Medical Equipment Journal,2026,47(3):26-33]关键词
钙钛矿材料/磺酰基配体/自供能光电器件/可穿戴生物传感器/光电性能Key words
sulfonyl-perovskite-materials/sulfonyl ligand/self-powered optoelectronic unit/wearable biosensor/optoe-lectronic properties分类
医药卫生
