Optical Absorption and Photoluminescence Properties of Pb(I, Br)-Based Two-Dimensional Layered Perovskite

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概要

• 論文の詳細を見る

• The influence of (C_6H_5C_2H_4NH_3)_2Pb(Br_xI_<4-x>) concentration on the formation of mixed crystals and optical properties of these materials was investigated. Thin films of microcrystalline (C_6H_5C_2H_4NH_3)_2Pb(Br_xI_<4-x>) were prepared by the spin-coating method using different concentrations of DMF solutions. Macroscopic inhomogeneity of the composition due to the precipitation of undesired phases could be suppressed by controlling the (C_6H_5C_2H_4NH_3)_2Pb(Br_xI_<4-x>) concentration. These films showed strong exciton absorption a with large (250-430 meV) binding energy due to both the quantum and dielectric confinement effect. Replacing I with Br made it possible to shift the exciton band to the blue region; however, photoluminescence from the mixed crystals gradually broadened with increasing the Br content.

• 社団法人応用物理学会の論文
• 1997-04-15

著者

• KITAZAWA Nobuaki

  Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, To

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