Efficient Slantwise Aligned Dion-Jacobson Phase Perovskite Solar Cells Based on Trans-1,4-Cyclohexanediamine
Publication in refereed journal

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摘要The crystalline orientation and phase distribution are two important parameters for high-performance 2D perovskite solar cells. Therefore, it is essential to understand how the structure of spacer ligands influences the orientation and phase distribution of resulting 2D perovskite films. In this work, a new member of Dion-Jacobson (DJ) phase 2D perovskites based on trans-1,4-cyclohexanediamine (CHDA) is demonstrated and it is found that the crystalline orientation is self-aligned spontaneously, which is different from the well-known graded distribution in controlled sample with its isomer 1,6-diaminohexane (HDA) as spacer ligand. Grazing incident X-ray scattering suggests that the exact alignment is strongly slantwise to the substrate while it is still beneficial for charge transfer along the vertical structure of devices. The devices can achieve high efficiency up to 15.01% for (CHDA)MA(3)Pb(4)I(13)(n = 4), one of the highest efficiencies reported by now. The encapsulated (CHDA)MA(3)Pb(4)I(13)(n = 4) devices can retain 80.7% efficiency for 270 min under continuous maximum power point tracking. (CHDA)MA(3)Pb(4)I(13)(n = 4) devices can retain 96.5% efficiency under 60 degrees C and 74.4% efficiency under 70 degrees C heating for 68 h. The results demonstrate the slantwise aligned DJ phase perovskite solar cells with excellent stability.
著者Wang H, Qin ZT, Xie JS, Zhao SH, Liu K, Guo XL, Li G, Lu XH, Yan KY, Xu JB
期刊名稱Small
出版年份2020
月份10
卷號16
期次42
出版社WILEY-V C H VERLAG GMBH
文章號碼2003098
國際標準期刊號1613-6810
電子國際標準期刊號1613-6829
語言英式英語
關鍵詞2D perovskites, cyclohexanediamine, DJ phase, slantwise alignment, stability
Web of Science 學科類別Chemistry, Multidisciplinary;Chemistry, Physical;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter;Chemistry;Science & Technology - Other Topics;Materials Science;Physics

上次更新時間 2021-11-05 於 00:07