Trina Solar has signed a perovskite patent licensing deal with Oxford PV – the former being one of the biggest solar manufacturers, and the latter being the most prestigious perovskite company. Under the terms of the deal, Trina Solar has exclusive rights to manufacture and sell perovskite products using Oxford PV’s technology in China, and can also sublicense there. This is further proof of growing investment in perovskites – but some fundamental technical parameters, above all lifespan, remain enigmatic. Without knowing how long Oxford PV or Trina’s perovskite lasts, it’s not possible to say when either company will have a commercially viable product. To reach commercial viability in any large market segment, perovskite will need 15-year lifespan, regardless of whether…