In an article published today, Pascal Roth from HSBC recommends DYE.
The article, in German, focuses on the recent uranium stock sell-off and the rise of solar stocks. It translates well using Google Translate.
This is the final paragraph:
Those who want to focus on renewable energies should be focused on securities that were not swept away by the total buying panic. These include the world leader in wind energy Vestas Wind Systems and also the securities of the developer of third generation solar technology Dyesol could be interesting because of the passage (invented in Lausanne) of the Graetzel cell, now could finally succeed.