Here's the lecture he's gave for the Nobel: https://www.nobelprize.org/nobel_prizes/economic-sciences/la...
If you're looking for information on nudges, check this: http://economicspsychologypolicy.blogspot.com/2013/08/nudge-...
It looks like they've stopped updating it but it has all sorts of economic research on nudges in it. Beware that some of this research is debated though.