In 1916, the physicist Robert Millikan produced photoelectricity in the laboratory.
From the halesowennews.co.uk
In 1905, Albert Einstein published his theories about photoelectricity.
From the halesowennews.co.uk
Ioffe was an expert in electromagnetism, radiology, crystals, high-impact physics, thermoelectricity and photoelectricity.
From the en.wikipedia.org
However, by 1921, when he was awarded the Nobel Prize and his work on photoelectricity was mentioned by name in the award citation, most physicists thought that light quanta were possible.