Maqola

Photoluminescent blue-shift of organic molecules in nanometre pores

Chunxiang XuDepartment of Electronic Engineering, Southeast University, Nanjing 210096, People's Republic of ChinaQinghua XueDepartment of Electronic Engineering, Southeast University, Nanjing 210096, People's Republic of ChinaYuan ZhongDepartment of Electronic Engineering, Southeast University, Nanjing 210096, People's Republic of ChinaYiping CuiDepartment of Electronic Engineering, Southeast University, Nanjing 210096, People's Republic of ChinaLong BaNational Laboratory of Molecular and Biomolecular Electronics, Southeast University, Nanjing 210096, People's Republic of ChinaBing ZhaoNational Laboratory of Molecular and Biomolecular Electronics, Southeast University, Nanjing 210096, People's Republic of ChinaNing GuNational Laboratory of Molecular and Biomolecular Electronics, Southeast University, Nanjing 210096, People's Republic of China

2002en

ABI

Annotatsiya

Porous alumina was fabricated by anodization in sulfuric acid and oxalic acid, where a laser dye, rhodamine 6G (RG6), and another luminescent organic molecule 8-hydroxyquinoline aluminum (Alq3) were impregnated. The morphology determined by atomic force microscopy shows that the size of the pores is about 10-15 nm for alumina prepared in sulfuric acid (H2SO4) and about 40-50 nm in oxalic acid (H2C2O4). An obvious blue-shifted photoluminescence (PL) of Alq3 and RG6 in nanometre-sized holes was observed. The measured spectral characteristics demonstrate the influence of the pore size on the emission of the organic molecules. The PL blue-shift of the molecules in smaller nanometre-sized holes is larger than that in larger holes.

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DOI: 10.1088/0957-4484/13/1/310

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