Hole-Transporting Materials with a Two-Dimensionally Expanded π-System around an Azulene Core for Efficient Perovskite Solar Cells
作者:Hidetaka Nishimura、Naoki Ishida、Ai Shimazaki、Atsushi Wakamiya、Akinori Saeki、Lawrence T. Scott、Yasujiro Murata
DOI:10.1021/jacs.5b11008
日期:2015.12.23
Two-dimensionally expanded pi-systems, consisting of partially oxygen-bridged triarylamine skeletons that are connected to an azulene (1-3) or biphenyl core (4), were synthesized and characterized. When tetra-substituted azulene 1 was used as a hole-transporting material (HTM) in perovskite solar cells, the observed performance (power conversion efficiency = 16.5%) was found to be superior to that of the current HTM standard Spiro-OMeTAD. A comparison of the hole mobility, the ability to control the HOMO and LUMO levels, and the hole-collection efficiency at the perovskite/HTM interface in 1 with reference compounds (2-4 and Spiro-OMeTAD) led to the elucidation of key factors required for HTMs to act efficiently in perovskite solar cells.
EP2269987
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公开(公告)日:——
Pushing the Ir-Catalyzed C–H Polyborylation of Aromatic Compounds to Maximum Capacity by Exploiting Reversibility
作者:Maria N. Eliseeva、Lawrence T. Scott
DOI:10.1021/ja307547j
日期:2012.9.19
Small amounts of base (e.g., 10% potassiumt-butoxide or sodium methoxide) have been found to promote equilibration of the kinetically favored products from Ir-catalyzed C-H polyborylations of aromatic compounds. In the presence of excess borylating agent, bis(pinacolato)diborane (B(2)pin(2)), repetitive deborylation/reborylations reposition the Bpin substituents until a pattern that accommodates the
已发现少量碱(例如,10% 叔丁醇钾或甲醇钠)可促进来自 Ir 催化的芳族化合物的 CH 多硼基化的动力学有利产物的平衡。在过量硼酸化剂双(频哪醇)二硼烷 (B(2)pin(2)) 的存在下,重复脱硼/重硼基化会重新定位 Bpin 取代基,直到实现可容纳最大数量的 Bpin 取代基的模式。据报道,1,3,5,7,9-pentakis(Bpin)corannulene 的高产一步合成说明了 Ir 催化的硼化反应的这种有用扩展。