If some company, not matter how big this company is, goes to bankruptcy this doesn't necessarily mean that everything in this sector is doomed for failure. Particularly not if we are talking about the solar energy industry, the only sector that is showing growth, and the one that is able to resist the overall economic slowdown.
Our Sun is the most abundant source of energy available in our planet, solar panels are becoming cheaper, and science is making them more efficient. Above everything solar energy has the biggest popularity of all other renewable energy sources so everything is there for future success.
The solar revolution has just started. There is much much more to come in years to follow. Let it shine :)