RESUMO
Intense pulsed light (IPL) annealing of graphene inks is demonstrated for rapid post-processing of inkjet-printed patterns on various substrates. A conductivity of ≈25,000 S m(-1) is achieved following a single printing pass using a concentrated ink containing 20 mg mL(-1) graphene, establishing this strategy as a practical and effective approach for the versatile and high-performance integration of graphene in printed and flexible electronics.
Assuntos
Elasticidade , Equipamentos e Provisões Elétricas , Grafite , Tinta , Luz , Impressão/métodos , Condutividade Elétrica , Grafite/química , Grafite/efeitos da radiação , Análise dos Mínimos Quadrados , Microscopia de Força Atômica , Processos Fotoquímicos , Polímeros/química , Polímeros/efeitos da radiação , Impressão/instrumentaçãoRESUMO
Flexible, stretchable, and spanning microelectrodes that carry signals from one circuit element to another are needed for many emerging forms of electronic and optoelectronic devices. We have patterned silver microelectrodes by omnidirectional printing of concentrated nanoparticle inks in both uniform and high-aspect ratio motifs with minimum widths of approximately 2 micrometers onto semiconductor, plastic, and glass substrates. The patterned microelectrodes can withstand repeated bending and stretching to large levels of strain with minimal degradation of their electrical properties. With this approach, wire bonding to fragile three-dimensional devices and spanning interconnects for solar cell and light-emitting diode arrays are demonstrated.