Highly Conductive and Environmentally Stable Organic Transparent Electrodes Laminated with Graphene

Abstract

Improving the lifetime and the operational and thermal stability of organic thin-fi lm materials while maintaining high conductivity and mechanical fl exibility is critical for fl exible electronics applications. Here, it is reported that highly conductive and environmentally stable organic transparent electrodes (TEs) can be fabricated by mechanically laminating poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) fi lms containing dimethylsulfoxide and Zonyl fl uorosurfactant (PDZ fi lms) with a monolayer graphene barrier. The proposed lamination process allows graphene to be coated onto the PDZ fi lms uniformly and conformally with tight interfacial binding, free of wrinkles and air gaps. The laminated fi lms exhibit an outstanding room-temperature hole mobility of ≈85.1 cm 2 V −1 s −1 since the graphene can serve as an effective bypass for charge carriers. The signifi cantly improved stability of the graphene-laminated TEs against high mechanical/thermal stress, humidity, and ultraviolet irradiation is particularly promising. Furthermore, the incorporation of the graphene barrier increases the expected lifetime of the TEs by more than two orders of magnitude.

Toward Environmentally Robust Organic Electronics: Approaches and Applications

“…To realize thermally stable organic electronics, in addition to thermally stable organic semiconductors, the development of electrodes based on organic conductors with thermal robustness is also necessary. Recently, Chu et al developed an environmentally stable and transparent graphene‐laminated polymer‐based conductor. The stable organic conducting layer based on PEDOT:PSS film containing dimethylsulfoxide (DMSO) and Zonyl fluorosurfactant, named as PDZ film was manufactured.…”

Oxidation behavior of graphene-coated copper at intrinsic graphene defects of different origins

“…According to the literature, the thickness of the barrier material of Cu should be reduced to < 2 nm to satisfy the requirement of sub−22 nm interconnect technology 1 , 12 . Thus far, graphene (Gr), the thinnest two-dimensional (2D) material known, appears to be the best candidate to satisfy this requirement because of its unique combination of properties that include ultrathin thickness, high carrier mobility, high chemical and thermal stabilities, and impermeability to all atoms, ions, and molecules 13 – 19 . Furthermore, Gr/Cu composites have the advantages of conducting a high current density with an enhanced thermal reliability compared to that of bare Cu 20 ; in addition, ultrathin graphene films can be directly formed on Cu surfaces with various shapes using a chemical vapor deposition (CVD) process, thereby minimizing any adhesion issues at the interface of graphene and Cu.…”

Graphene as a Transparent and Conductive Electrode for Organic Optoelectronic Devices

“…Since there are various methods for transferring large‐area graphene onto the top of desired substrates, graphene has also been developed as the transparent conductive top electrodes for organic optoelectronic devices, especially for the semitransparent devices. As a promising replacement of metal top electrodes, graphene has unique nature of ultrahigh transparency, excellent flexibility, and air stability with impermeability to gas and liquid . For the first time, Lee et al reported semitransparent OSCs with top laminated graphene anode .…”