I want to know the answer to the following question:
Who investigated the efficiency of high-brightness LED at Cardiff University in 1995?
All the background I'm provided with is that "In 1995, Alberto Barbieri at the Cardiff University Laboratory (GB) investigated the efficiency and reliability of high-brightness LEDs and demonstrated a "transparent contact" LED using indium tin oxide (ITO) on (AlGaInP/GaAs).". Is that enough to answer the question?