Applied Physics Letters · 2003 · 49 citations · 10 references
EngineeringMaterials EngineeringMaterials ScienceOptical MaterialsPhotonicsSemiconductor MaterialsOptical Properties Of SemiconductorsSemiconductor Device MaterialsSemiconductor NanomaterialsSemiconductor SurfacesSilicon MaterialsBlue Light EmissionEtchingLaser AblationPorous SiliconSiliconSilicon NanostructuresSilicon WafersSingle-crystal Silicon
Strong blue emission around 435 nm from porous silicon (PS) embedded in Pb(Zrx,Ti1−x)O3 (PZT) is realized, which is stable and clearly visible to the naked eye even after exposure in an ambient atmosphere for a year. The sample is obtained by hydrothermal etching of (100)-oriented single crystal silicon wafers in an HF aqueous solution, followed by pulsed laser ablation deposition of a PZT thin layer on the surface of the PS. The electrons and holes excited from silicon nanocrystallites could be separated by the PZT-induced electrostatic field and migrate to the boundaries of PS/PZT along opposite directions, respectively. Therefore, the blue emission is interpreted in terms of the recombination of excited carriers from the silicon nanocrystallites in the interfacial region of PS/PZT.
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Rapid-thermal-oxidized porous Si−The superior photoluminescent Si
V. Petrova-Koch, T. Muschik, A. Kux et al. · Applied Physics Letters · 1992 · 466 citations
Natural Sciences, Materials Engineering, Materials Science +17