title: Non-uniform space charge limited current injection into a nano contact solid.
abstract: We have developed a two-dimensional (2D) non-uniform model to study the space charge limited (SCL) current injection into a trap-filled solid of nano-contact, such as organic materials and dielectrics. Assuming a solid of length D with a contact of width W, the enhancement over the well-known 1D uniform model is calculated as a function of W/D for different material properties, such as the dielectric constant (ε) and the trap distribution. The non-uniform current density profile due to edge effect is predicted. The findings reported here are different from the prior uniform 2D models, which are significant for small W/D when the size of the contact reaching nanometer scale, i.e. W = 50 nm for D = 1 μm. This model will be useful for the characterization of carrier mobility and properties of traps, which are critical to many novel devices (with small nano-contact) operating in the space charge limited condition reporting in novel device and its applications. Empirical formulas are given for future comparison with experimental results.
authors.affiliation: Engineering Produce Development, Singapore University of Technology and Design, Singapore 639798.
authors.forename: Y B
authors.initials: YB
authors.lastname: Zhu
authors.affiliation: Engineering Produce Development, Singapore University of Technology and Design, Singapore 639798.
authors.forename: L K
authors.initials: LK
authors.lastname: Ang