photovoltaics on the rear of the science pyramid, photo via archello. research team discovers unexpected effect of heavy hydrogen in organic solar cells. solar photovoltaic at number one in the power charts. collaborative effort proves silicon-based solar cells can reach nearly 36% efficiency. the experimental polaron solar cell in the lab credit: dirk raiser, mpibc/desy. researchers develop a novel organic device for obtaining hydrogen from water and sunlight. national renewable energy laboratory (nrel) make quantum dot perovskite solar cells. (selected as a front cover). social dinner will take place on 2019 january 28th at the funatsuru kyoto kamogawa resort. 2015 epfl. with the help of the interactive model town esiville, the path to a future energy.