title: Origin of the anomalous temperature evolution of photoluminescence peak energy in degenerate InN nanocolumns.
abstract: Photoluminescence (PL) behaviour in InN nanocolumns reveal decreasing, increasing and near invariant peak energies (E(PL)) as a function of temperature. Samples, having E(PL)~0.730 eV at 20 K, showed temperature invariance of E(PL). Samples possessing E(PL) 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.
authors: Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
authors: Pai-Chun
authors: PC
authors: Wei
authors: Surojit
authors: S
authors: Chattopadhyay
authors: Fang-Sheng
authors: FS
authors: Lin
authors: Chih-Ming
authors: CM
authors: Hsu
authors: Shyankay
authors: S
authors: Jou
authors: Jr-Tai
authors: JT
authors: Chen
authors: Ping-Jung
authors: PJ
authors: Huang
authors: Hsu-Cheng
authors: HC
authors: Hsu
authors: Han-Chang
authors: HC
authors: Shih
authors: Kuei-Hsien
authors: KH
authors: Chen
authors: Li-Chyong
authors: LC
authors: Chen
mesh_terms: D004867:Equipment Design; D007204:Indium / Q000737:chemistry*; D008027:Light; D049449:Luminescence; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning / Q000379:methods; D046529:Microscopy, Electron, Transmission / Q000379:methods; D036103:Nanotechnology / Q000379:methods*; D010777:Photochemistry / Q000379:methods*; D012666:Semiconductors; D013053:Spectrophotometry / Q000379:methods; D013696:Temperature
chemical_list: D007204:Indium; C513701:indium nitride