oxford

Perovskites: The Future of PV?

By Sam Stranks A new material has entered the emerging low-cost photovoltaics arena and is threatening to blow much of the existing competition away. Power conversion efficiencies (how efficiently incident sunlight is converted to electrical power) in perovskite-based solar cells have increased from a starting point of 3.8% in 2009 to a staggering … [continued]

Beautiful

Think these are the prettiest Christmas decorations I’ve seen. Thank you, internet! Best bike lights ever http://t.co/DPvrRtLUb6 — Kay Teschke (@kteschke) December 23, 2013 @kteschke @BikeBikeYYC @SecretCoAuthor Oxford, UK. The tandem is the best: pic.twitter.com/5UWW7Vz2wp — Richard Mann (@ParadiseOxford) December 23, 2013 Special thanks to Michael Graham Richard of TreeHugger … [continued]