A ZnO nanoparticle UV detector on a fabric substrate pretreated with Prussian blue with high anti-twist performance

The anti-twist performance of flexible electronic devices prepared on fabrics is often limited by the degree of bonding between the electronic material and the fabric. This work addresses the issue of limited bonding strength between traditional semiconductor oxide nanomaterials and fabric substrates, by enhancing the bonding ability between ZnO nanoparticles and fabric fibers through Prussian blue pretreatment. The test results show that after appropriate Prussian blue treatment, the anti-twist performance of the ZnO nanoparticle UV detectors prepared on fabric substrates has significantly improved. The on/off ratios of the obtained ZnO/PB device after twisting 100, 200, 300, 600, and 900 times are 37.8, 26.7, 28.5, 7.5, and 30.9, respectively, while the ZnO/PVDF device loses its detection ability after twisting 600 times. Even after twisting to 540°, the ZnO/PB device can still exhibit obvious UV response characteristics, with a photocurrent of about 0.09 nA. Compared with those of untreated devices and devices bonded with PVDF, the anti-twist performance of the ZnO/PB device has been significantly enhanced. These results provide a data foundation and research ideas for the development of wearable optoelectronic devices based on traditional semiconductor oxide materials in the future.