6533b85cfe1ef96bd12bc77b

RESEARCH PRODUCT

Luminescence properties of wurtzite AlN nanotips

Surojit ChattopadhyayBo Wen KeLaima TrinklerShih Chen ShiChia-fu ChenB. BerzinaLi-chyong ChenKuei-hsien Chen

subject

Materials sciencePhotoluminescencePhysics and Astronomy (miscellaneous)business.industryWide-bandgap semiconductorOptoelectronicsCathodoluminescenceNitridebusinessLuminescenceThermoluminescenceBlueshiftWurtzite crystal structure

description

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 3.4eV and an excitonic feature at 6.2eV were identified. Compared to the AlN macropowders, the AlNNTs showed a blueshift (+0.2eV) of the ∼3.2eV 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.

yearjournalcountryeditionlanguage
2006-10-16Applied Physics Letters
https://doi.org/10.1063/1.2364158