Thin-Film Organic Photonics

1 Introduction

Organic functional thin-film materials are expected to be applied to various kinds of photonic/electronic devices, such as nonlinear optical circuits, photovoltaic devices, electroluminescent (EL) devices, thin-film transistors (TFTs), and bio/medical-photonic devices, due to the following four features.

1. Dimensionality, which affects optical and electronic properties, is easily controlled in organic thin-film materials, especially between the dimensionality of one and zero. The dimensionality control can be achieved in polymer wires as shown in Figure 1.1. Conjugated polymer wires are regarded as one-dimensional systems, that is, quantum wires, in which π-electrons are widely spread. By inserting molecular units that disconnect ...