You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: It has effects on both luminous efficiency and low driving voltage.
user
Clc1ccc2c(c1)sc1cc3c(cc12)Sc1cc(Br)ccc1C31c2ccccc2-c2ccccc21
assistant