SOLID-STATE AMPLIFIED SPONTANEOUS EMISSION IN SOME SPIRO-TYPE MOLECULES - A NEW CONCEPT FOR THE DESIGN OF SOLID-STATE LASING MOLECULES

Communication: Spectral narrowing in amorphous molecular solid films o f spiro-type molecules such as spiro-quarterphenyl (see Figure) is rep orted. It is demonstrated that introduction of the spiro linkage not o nly improves the processability and morphological properties but, for the molecules studied here, also suppresses concentration quenching, m aking these molecular solids attractive candidates for molecular solid -state lasers.