Large-area flexible, transparent, and highly luminescent films containing lanthanide (III) complex-doped ionic liquids for efficiency enhancement of silicon-based heterojunction solar cell

Xinyue Zhang, Tianren Wang, Xiaoting Qin, Zhongyi Zhang, Yunyu Sun, Hongze Liang, Huanrong Li

Index: 10.1002/pip.2915

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Abstract

Novel Ln3+ complex-doped ILs have been successfully prepared, showing excellent luminescence performance and very high absolute quantum efficiency (up to 97.22%). Large area (17 × 17 cm2) flexible, transparent, and luminescent PMMA thin films were prepared through a simple drop-casting method, which were applied as luminescent downshifting coatings to the Si-based heterojunction solar cells (active area: 235 cm2). In the best case, the PV energy conversion efficiency of the solar cell increases from 16.676% to 16.774%.