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" ... Meydbray indicates the solar R&D universe is now working on two technologies: heterojunction – which is a totally new cell technology (Meyer Burger is also working on this – which would necessitate a totally new greenfield solar manufacturing facility) and passivated contact “”which is incremental but difficult.” The jury is still out on both of these, but he comments “we have a few years before we need to it to go up the efficiency curve.” ... "