Additive manufacturing of electronic devices using inkjet printing provides a potential alternative approach in substitution for con-ventional electronic fabrication processes.However,the complex nature of inkjet prin...Additive manufacturing of electronic devices using inkjet printing provides a potential alternative approach in substitution for con-ventional electronic fabrication processes.However,the complex nature of inkjet printing involves the liquid deposition and film formation from the vaporization of solvent,which makes it different from film created by conventional deposition methods.Inkjet print-ing of zinc oxide(ZnO),which is a widely utilized semiconductor,produces polycrystalline film composed of nano-size grains,which could significantly influence the properties of printed film.In this study,low-temperature annealing was employed to treat inkjetprinted ZnO for UV photodetection application,and its influence on electrical properties was studied.Band bending was character-ized using the Mott-Schottky plot which examines the charge dis-tribution of the films.It is found that the annealing of inkjet-printed polycrystalline ZnO film has improved its electrical properties,which could be attributed to the reduction of band bending due to the merging of grains.The treatment also helps to reduce impurities of the film,such as zinc hydroxide complexes,which is common for solution-derived films.Hence,the study could pay the way for the improvement of electrical properties of inkjet-printed functional materials.展开更多
基金This work was supported by Nanyang Technological University and the Ministry of Education of Singapore through a Ph.D.Scholarship and AcRF Tier 1 research grant(RG 96/18).
文摘Additive manufacturing of electronic devices using inkjet printing provides a potential alternative approach in substitution for con-ventional electronic fabrication processes.However,the complex nature of inkjet printing involves the liquid deposition and film formation from the vaporization of solvent,which makes it different from film created by conventional deposition methods.Inkjet print-ing of zinc oxide(ZnO),which is a widely utilized semiconductor,produces polycrystalline film composed of nano-size grains,which could significantly influence the properties of printed film.In this study,low-temperature annealing was employed to treat inkjetprinted ZnO for UV photodetection application,and its influence on electrical properties was studied.Band bending was character-ized using the Mott-Schottky plot which examines the charge dis-tribution of the films.It is found that the annealing of inkjet-printed polycrystalline ZnO film has improved its electrical properties,which could be attributed to the reduction of band bending due to the merging of grains.The treatment also helps to reduce impurities of the film,such as zinc hydroxide complexes,which is common for solution-derived films.Hence,the study could pay the way for the improvement of electrical properties of inkjet-printed functional materials.
