Louis De Brogile's original idea 

  "I obtained the following general idea, in accordance with which I pursued my investigations: that it is necessary in the case of Matter, as well as of radiation generally and Light in particular, to introduce the idea of the corpuscle and of the wave simultaneously"

and John.S. Bell. support

  "This idea seems to me so natural and simple, to resolve the wave-particle dilemma in such a clear and ordinary way, that it is a great mystery to me that it was so generally ignored"

Longer citation and references in  De Brogile, Bell

Here is a very nice demonstration of how electron also have wave character, electrondiffraction.

Especially how  a magnet effects the diffractionpattern and as it is said shows that its not light but electron charged particles which make up the diffractionpattern.
To my mind this supports de Brogile's view BOTH PARTICLE AND WAVE

In this other film you can see att the end (at 3.40) that only the diffraction pattern is moved by the magnet, but not the green background, which then seems to be due to electromagnetic waves also making the tubescreen scintillatate. So again this shows the difference between e-m waves and the wave of charged electrons