Charge-Transporting Molecular Glasses

Among organic materials vitrification for many years was regarded mainly as a privilege of polymers. However, recently a lot of attention is paid to organic low molar mass compounds that readily form glasses above room temperature. Such compounds are called molecular glasses or amorphous molecular materials. Among these materials the most widely studied are charge-transporting molecular glasses used in copiers and laser printers, organic light-emitting diodes, photovoltaic devices, and as photorefractive materials. Two types of molecular glasses, i.e., p-type (hole-transporting), and n-type (electron-transporting) are discussed. Work of the laboratories of the authors is emphasized. In addition, an overview of current and potential applications for these materials is presented.