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Crisscrossed Eu3+-doped Y(OH)3 nanotubes spin cast on the front surface of the screen-printed monocrystalline silicon solar cells (SPMSSCs) have been fabricated to enhance the conversion efficiency (CE) of the SPMSSCs. Organic-solvent-dispersible Eu3+-doped Y(OH)3 nanotubes were hydrothermally synthesized according to the modified liquid-solid-solution synthetic strategy. Intense and well-resolved photoluminescent lines in the range of 525-700 nm are observed from the Eu3+-doped Y(OH)3 nanotubes. The achievement of a CE improvement of more than 2% absolute from 15.2% to 17.2% in the SPMSSCs with Eu3+-doped Y(OH)3 nanotubes was explored.