High density GaN/AlN quantum dots for deep UV LED with high quantum efficiency and temperature stability

High internal efficiency and high temperature stability ultraviolet (UV) light-emitting diodes (LEDs) at 308 nm were achieved using high density (2.5 × 10(9) cm(−2)) GaN/AlN quantum dots (QDs) grown by MOVPE. Photoluminescence shows the characteristic behaviors of QDs: nearly constant linewidth and...

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Detalles Bibliográficos
Autores principales: Yang, Weihuang, Li, Jinchai, Zhang, Yong, Huang, Po-Kai, Lu, Tien-Chang, Kuo, Hao-Chung, Li, Shuping, Yang, Xu, Chen, Hangyang, Liu, Dayi, Kang, Junyong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4046137/
https://www.ncbi.nlm.nih.gov/pubmed/24898569
http://dx.doi.org/10.1038/srep05166
Descripción
Sumario:High internal efficiency and high temperature stability ultraviolet (UV) light-emitting diodes (LEDs) at 308 nm were achieved using high density (2.5 × 10(9) cm(−2)) GaN/AlN quantum dots (QDs) grown by MOVPE. Photoluminescence shows the characteristic behaviors of QDs: nearly constant linewidth and emission energy, and linear dependence of the intensity with varying excitation power. More significantly, the radiative recombination was found to dominant from 15 to 300 K, with a high internal quantum efficiency of 62% even at room temperature.

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