Highly transparent paper with tunable haze for green electronics

Transparent paper made of cellulose has attracted increased interest in the scientic community because it enables lighter, cheaper, more exible, and environmentally benign electronics of the future. The ability to modulate the dimension of cellulose bers in the nanoscale and microsized range by advanced processes enables paper to possess a tailored light scattering effect while maintaining high optical transmittance. Tunable optical haze is a performance-enhancing characteristic of transparent paper compared to plastics used in exible electronics, because paper is not only a substrate but also a functional component for electronics. This characteristic has great potential to open up new opportunities for transparent paper. As a proof-of-concept, we demonstrated a high-performance MoS2 transistor on a highly transparent paper. The ability to manage the light scattering effect of transparent paper without sacrificing its original high transmittance is critical for the application in optoelectronics since different devices have different requirements for the optical properties. In this paper, we study highly transparent paper with a tunable transmission haze by rationally managing the ratio of nanoscale cellulose fibers to macroscopic cellulose fibers. The transparent papers present a largely modulated light scattering behavior while retaining a transparency of over 90%. Various measurements are then used to characterize the optical properties of the different transparent papers in detail. To demonstrate the device applications in green electronics, we fabricated a top gated transistor with MoS2 on the transparent paper containing 100% NFC that leads to an excellent on/off ratio. The highly transparent paper with a controllable light scattering behavior has an unprecedented potential for applications in optoelectronic devices as a substrate or a functional component.