Nanowerk  January 5, 2023 An international team of researchers (Spain, Saudi Arabia, China) integrated semiconducting devices on cellulose paper substrate through a simple abrasion technique that yielded high-performance photodetectors. A solvent-free WS2 film deposited on paper favored an effective electron-hole separation and hampered recombination. The prototype photodetectors exhibited a sensitive photoresponse over a wide spectral range spanning from ultraviolet (365 nm) to near-infrared (940 nm). They found that ambient oxygen molecules decreased the photoresponse and stability of the photodetector. By controlling environmental exposure, they were able to increase the performance of the detector. They built a spectrometer using a paper-based […]