期刊
MATERIALS TODAY ENERGY
卷 7, 期 -, 页码 232-238出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mtener.2017.10.001
关键词
Wide bandgap perovskite; Tandem solar cell; Non-stoichiometric chemistry
资金
- U.S. Department of Energy SunShot Initiative under the Next Generation Photovoltaics 3 program [DE-FOA-0000990]
- U.S. Department of Energy [DE-AC36-08GO28308]
A high-efficiency wide-bandgap (WBG) perovskite solar cell is critical for developing perovskite-related (e.g., all-perovskite, perovskite/Si, or perovskite/Cu(In, Ga)Se-2) tandem devices. Here, we demonstrate the use of non-stoichiometric precursor chemistry with excess methylammonium halides (MAX; X = I, Br, or Cl) for preparing high-quality similar to 1.75-eV FA(0.83)Cs(0.17)Pb(I0.6Br0.4)(3) perovskite solar cells. Among various methylammonium halides, using excess MABr in the non-stoichiometric precursor exhibits the strongest effect on improving perovskite crystallographic properties and device characteristics without affecting the perovskite composition. In contrast, using excess MAI significantly reduces the bandgap of perovskite due to the replacement of Br with I. Using 40% excess MABr, we demonstrate a single-junction WBG perovskite solar cell with stabilized efficiency of 16.4%. We further demonstrate a 20.3%-efficient 4-terminal tandem device by using a 14.7%-efficient semi-transparent WBG perovskite top cell and an 18.6%-efficient unfiltered (5.6%-efficient filtered) Si bottom cell. (C) 2017 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据