If you study, on the other hand, semiconductor physics, friction, or material physics you'll find half a dozen offers for well paid positions in industry research labs in no time.
Don't. Make. Me. Laugh.
"Semiconductor physics" is a huge field, and "materials science" is even broader, and only a few tiny niches are hot at any moment, and if you don't luck into one of those you may as well have spent a few years putting a more precise limit on a particular branch of the decay of a non-existent particle (which is what I did for my PhD.)
When I was a student there were two particularly big things in semiconductor physics: molecular beam epitaxi and gallium arsenide. By the time I graduated both were passe', although I knew one student who just squeaked in under the wire and got a good job on the basis of his graduate work in MBE.
Tribology (friction) certainly has some appeal currently, particularly in medical devices and implants, but that's today. I would never advise a student to go into a particular field simply based on the current prospects for jobs, because I know too well that the jobs may not be there in three or five (or ten) years.
From another perspective, there is no shortage of scientists: there is a shortage of scientists who fit the unbelievably narrow specificatoins that hiring managers put on open positions (the so-called "purple squirrel" phenomenon.)
On top of this, there is this relentless chorus of educators and policy-makers continually screaming that we need more educated people in general and more people with science and engineering degrees in particular, preferably at the PhD level--because a Masters is pretty much an admission of failure in the sciences--while the hard reality is that threads like this are full of two pieces of generally sound advice for people with PhDs looking for jobs outside of the hundred-to-one odds of tenure-track appointments:
1) apply to universities in support capacities, where smart people are valued even if their degree isn't in the immediate field of application
2) lie about having a PhD.
Those are good pieces of advice unless you present yourself very, very carefully. I've been fortunate to be able to leaverage my PhD into some amazingly cool stuff and also fortunate that I've got the right attitude and skills to run my own business, which I did for about a decade. But I broke into the commerical software market during the dot-com boom where they'd hire a dog if had some coding experience. Unless you've had comparable good fortune, the thing that the OECD and others are all telling you should do--get a PhD so you can get a good job--is actually a significant impediment to getting a good job.
Almost everyone here knows this, but almost no one going into a PhD program realizes it because of the sytematic hype-machine promoting higher education as the road to riches.