If you have a stake in PV, you may wish to check out the drafts of the national (US) PV roadmaps:
These roadmaps are national roadmaps, although they are being coordinated by NREL (each of the project leaders is an NREL employee).
Fresh minds bring fresh ideas, so feel free to contact the project leaders listed by each research topic to contribute. I will surely be sending in my comments, and I encourage you to do the same.
As our beloved Dick Fenner loves to say, "lead, follow, or get out of the way"!