o-Methoxy Substituents in Spiro-OMeTAD for Efficient Inorganic鈥揙rganic Hybrid Perovskite Solar Cells

详细信息    查看全文

• 作者：Nam Joong Jeon ; Hag Geun Lee ; Young Chan Kim ; Jangwon Seo ; Jun Hong Noh ; Jaemin Lee ; Sang Il Seok
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：June 4, 2014
• 年：2014
• 卷：136
• 期：22
• 页码：7837-7840
• 全文大小：239K
• 年卷期：v.136,no.22(June 4, 2014)
• ISSN：1520-5126

文摘

Three spiro-OMeTAD derivatives have been synthesized and characterized by ¹H/¹³C NMR spectroscopy and mass spectrometry. The optical and electronic properties of the derivatives were modified by changing the positions of the two methoxy substituents in each of the quadrants, as monitored by UV鈥搗is spectroscopy and cyclic voltammetry measurements. The derivatives were employed as hole-transporting materials (HTMs), and their performances were compared for the fabrication of mesoporous TiO₂/CH₃NH₃PbI₃/HTM/Au solar cells. Surprisingly, the cell performance was dependent on the positions of the OMe substituents. The derivative with o-OMe substituents showed highly improved performance by exhibiting a short-circuit current density of 21.2 mA/cm², an open-circuit voltage of 1.02 V, and a fill factor of 77.6% under 1 sun illumination (100 mW/cm²), which resulted in an overall power conversion efficiency (PCE) of 16.7%, compared to 15% for conventional p-OMe substituents. The PCE of 16.7% is the highest value reported to date for perovskite-based solar cells with spiro-OMeTAD.