Daehan Kim; Hee Joon Jung; Ik Jae Park; Bryon W. Larson; Sean P. Dunfield; Chuanxiao Xiao; Jekyung Kim; Jekyung Kim; Jinhui Tong; Passarut Boonmongkolras; Ji Su; Fei Zhang; Seong Ryul Pae; Min Kyu Kim; Seok Beom Kang; Vinayak P. Dravid; Joseph J. Berry; Jin Young Kim; Jin Young Kim; Kai Zhu; Dong Hoe Kim; Byungha Shin · 2020 · Science
Paper
Maximizing the power conversion efficiency (PCE) of perovskite/silicon tandem solar cells that can exceed the Shockley-Queisser single-cell limit requires a high-performing, stable perovskite top cell with a wide bandgap. We developed a stable perovskite solar cell with a bandgap of ~1.7 electron volts that retained more than 80% of its initial PCE of 20.7% after 1000 hours of continuous illumination. Anion engineering of phenethylammonium-based two-dimensional (2D) additives was critical for controlling the structural and electrical properties of the 2D passivation layers based on a lead iodide framework. The high PCE of 26.7% of a monolithic two-terminal wide-bandgap perovskite/silicon tandem solar cell was made possible by the ideal combination of spectral responses of the top and bottom cells.
Analysis
This paper presents a stable, wide-bandgap perovskite solar cell (~1.7 eV) that, when used in a monolithic two-terminal perovskite/silicon tandem cell, achieves a high power conversion efficiency (PCE) of 26.7%.
Discovery
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