Origin of the anomalous temperature evolution of Photoluminescence peak energy in degenerate InN nanocolumns

Pai Chun Wei*, Surojit Chattopadhyay, Fang Sheng Lin, Chih Ming Hsu, Shyankay Jou, Tai Chen, Ping Jung Huang, Hsu Cheng Hsu, Han Chang Shih, Kuei Hsien Chen, Li Chyong Chen

*此作品的通信作者

研究成果: Article同行評審

16 引文 斯高帕斯(Scopus)

摘要

Photoluminescence (PL) behaviour in InN nanocolumns reveal decreasing, increasing and near invariant peak energies (EPL) as a function of temperature. Samples, having EPL∼0.730 eV at 20 K., showed temperature invariance of EPL. Samples possessing EPL on the lower and higher energy side of 0.730 eV demonstrate a normal redshift and anomalous blueshift, respectively, with increasing temperature. This temperature evolution can be effectively explained on the basis of a competition between a conventional red shift from lattice dilation, dominant for low carrier density sample, on one hand, and a blue shift of the electron and hole quasi Fermi-level separation, dominant for high carrier density samples, on the other.

原文English
頁(從 - 到)11690-11697
頁數8
期刊Optics Express
17
發行號14
DOIs
出版狀態Published - 6 7月 2009

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