Single-step selective laser writing of flexible photodetectors for wearable optoelectronics
| Autor: | Chin Huat Joel Lim, Jianing An, Yi Gao, Gengzhi Sun, Zhaoyao Zhan, Van-Thai Tran, Truong-Son Dinh Le, Lianxi Zheng, Young-Jin Kim |
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| Přispěvatelé: | School of Mechanical and Aerospace Engineering, Singapore Centre for 3D Printing |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Fabrication General Chemical Engineering Soft robotics General Physics and Astronomy Medicine (miscellaneous) Photodetector 02 engineering and technology 010402 general chemistry 01 natural sciences Biochemistry Genetics and Molecular Biology (miscellaneous) law.invention law flexible photodetectors General Materials Science hierarchical morphology graphene hybrids Nanocomposite Full Paper Flexible Photodetectors Graphene business.industry Graphene Hybrids General Engineering wearable optoelectronics Heterojunction Full Papers 021001 nanoscience & nanotechnology Laser single‐step selective laser writing 0104 chemical sciences Engineering::Mechanical engineering [DRNTU] Optoelectronics 0210 nano-technology business Layer (electronics) |
| Zdroj: | Advanced Science |
| Popis: | The increasing demand for wearable optoelectronics in biomedicine, prosthetics, and soft robotics calls for innovative and transformative technologies that permit facile fabrication of compact and flexible photodetectors with high performance. Herein, by developing a single‐step selective laser writing strategy that can finely tailor material properties through incident photon density control and lead to the formation of hierarchical hybrid nanocomposites, e.g., reduced graphene oxide (rGO)–zinc oxide (ZnO), a highly flexible and all rGO–ZnO hybrid‐based photodetector is successfully constructed. The device features 3D ultraporous hybrid films with high photoresponsivity as the active detection layer, and hybrid nanoflakes with superior electrical conductivity as interdigitated electrodes. Benefitting from enhanced photocarrier generation because of the ultraporous film morphology, efficient separation of electron–hole pairs at rGO–ZnO heterojunctions, and fast electron transport by highly conductive rGO nanosheets, the photodetector exhibits high, linear, and reproducible responsivities to a wide range of ultraviolet (UV) intensities. Furthermore, the excellent mechanical flexibility and robustness enable the photodetector to be conformally attached to skin, thus intimately monitoring the exposure dosage of human body to UV light for skin disease prevention. This study advances the fabrication of flexible optoelectronic devices with reduced complexity, facilitating the integration of wearable optoelectronics and epidermal systems. NRF (Natl Research Foundation, S’pore) Published version |
| Databáze: | OpenAIRE |
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