ABSTRACT
Over the past few decades, enormous progresses have been made in the fi eld of organic optoelectronic devices. A fi rst generation of visible organic light-emitting diodes (OLEDs) has been commercialized, organic solar cells have achieved high conversion effi ciency, and thousands of papers on organic fi eld-effect transistors (OFETs) and nonlinear optical materials have been published. Compared to inorganic materials, organic molecular materials display important roles in applications because of their low cost, easiness of device fabrication, high effi ciency, and richness in molecular modifi cation. The main properties of major class of organic small molecules are outlined in Table 5.1. Among a variety of well-studied small molecules, some of them are versatile
TABLE 5.1 Summary of Major Classes of Organic Small Molecules
TABLE 5.1 (continued) Summary of Major Classes of Organic Small Molecules
in that they could be applied in many aspects of optoelectronics, such as phthalocyanines, porphyrins, and perylene bisimides. Some of them are mainly studied in one area, for example, the research on pentacene mainly lies in OFET. In this chapter, we mainly discuss the widely developed organic molecular materials for their applications in optoelectronics.
