Luminescence properties of wurtzite AlN nanotips

Shih-Chen Shi, Chia Fu Chen, Surojit Chattopadhyay, Kuei Hsien Chen, Bo Wen Ke, Li Chyong Chen, Laima Trinkler, Baiba Berzina

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43 Citations (Scopus)

Abstract

The optical properties of aluminum nitride nanotips (AlNNTs) synthesized via vapor transport and condensation process have been studied by cathodoluminescence, photoluminescence (PL), thermoluminescence (TL), and UV absorption measurements. Two defect related transitions around 2.1 and 3.4 eV and an excitonic feature at 6.2 eV were identified. Compared to the AlN macropowders, the AlNNTs showed a blueshift (+0.2 eV) of the ∼3.2 eV peak. Analysis of both PL and TL excitation measurements indicated the existence of subband gap multiple energy levels in AlNNTs. A significant TL intensity even at 145 °C suggests possible ultraviolet detector and dosimetric applications of these AlNNTs.

Original languageEnglish
Article number163127
JournalApplied Physics Letters
Volume89
Issue number16
DOIs
Publication statusPublished - 2006 Oct 25

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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