Dong Hwan Wang

TL;DR: Analysis of the current-voltage (J-V) characteristics at various light intensities provides information on the different recombination mechanisms in the BHJ solar cells with different thicknesses of the Ca layer, revealing that the J-V curves are dominated by first-order recombination from the short-circuit condition to the maximum power point and evolve to bimolecular recombination in the range of voltage in the optimized device with a Ca thickness of 20 nm.

TL;DR: The ZnO layer used to improve the light-harvesting increases the charge collection efficiency, serves as a blocking layer for holes, and reduces the recombination rate and the combined optical and electrical improvements raise the power conversion efficiency to 8.9%, comparable to that of polymer counterparts.

TL;DR: In inverted structure small-molecule (SM) solar cells with an efficiency of 7.88% are demonstrated using ZnO and PEIE as an interfacial layer and are relatively stable in air compared to conventional cells.

TL;DR: This research was supported by Future-based Technology Development Program (Nano Fields, 2010-0029321) and the WCU (World Class University) program (R32-2008-000-10142-0) through the NRF of Korea funded by the MEST.

TL;DR: Barium (Ba) cathode layer for bulk-heterojunction solar cells which enhanced the fill factor (FF) of p-DTS(FBTTh2)2/PC71BM BHJ solar cell up to 75.1%, one of the highest value reported for an organic solar cell.