Electroluminescence Enhancement in Dry-Processed Organic-Inorganic Layered Perovskite Films

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概要

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• Organic-inorganic layered perovskite, (C6H5C2H4NH3)2PbI4, was grown on silica substrates or indium tin oxide (ITO) substrates by vacuum vapor deposition. High-quality layered perovskite films, which showed sharp and intense exciton peaks, were obtained when substrate surfaces were covered with either an octadecyltrichlorosilane (OTS) monolayer or a vacuum-deposited copper phthalocyanine (CuPc) layer. Light-emitting devices (LEDs) with structures of ITO/OTS/layered perovskite/2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP)/2,4-pentanedionato lithium (Li acac)/Al, ITO/CuPc/layered perovskite/BCP/Li acac/Al, and ITO/layered perovskite/BCP/Li acac/Al were fabricated. Sharp electroluminescence (EL) peaks from excitons stabilized in a quantum well structure were observed in each LED at 105 K. The LED with the CuPc layer exhibited the highest EL intensity and efficiency among the three LEDs. This EL enhancement is ascribed to the improvement in film properties and a decrease in the height of the hole injection barrier induced by growing the layered perovskite film on a CuPc layer.

• 2005-03-15

著者

• MATSUSHIMA Toshinori

  Department of Applied Science and Electronics and Materials, Graduate School of Engineering, Science

• Fujita Katsuhiko

  Department Of Applied Science For Electronics And Material Chemistry Interdisciplinary Graduate Scho

• Tsutsui Tetsuo

  Department Of Applied Science For Electronic And Materials Graduate School Of Engineering Sciences K

• Fujita Katsuhiko

  Department of Applied Science for Electronics and Materials, Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga, Fukuoka 816-8580, Japan

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