Browsing by Subject "semiconductor"

Now showing items 1-11 of 11

    • Article  

      A2Bi8Se13 (A = Rb, Cs), CsBi3.67Se6, and BaBi2Se4: New ternary semiconducting bismuth selenides 

      Iordanidis, L.; Brazis, P. W.; Kyratsi, Theodora; Ireland, J.; Lane, M.; Kannewurf, C. R.; Chen, W.; Dyck, J. S.; Uher, C.; Ghelani, N. A.; Hogan, T.; Kanatzidis, M. G. (2001)
      Rb2Bi8Se13 (I), Cs2Bi8Se13 (II), CsBi3.67Se6 (III), and BaBi2Se4 (IV) were synthesized by direct combination reactions of the A/Se (A = Rb, Cs, Ba) and Bi2Se3 at ≥650 °C. Their structures were determined by single-crystal ...
    • Article  

      Charge generation in inorganic/organic photovoltaic blends 

      Westenhoff, S.; Hayes, Sophia C.; Greenham, N. C.; Silva, C. (2004)
      We apply ultrafast spectroscopy to investigate charge generation kinetics in blends of semiconducting polymers and cadmium selenide nanocrystals with photovoltaic applications. The rate is limited by diffusion of the primary ...
    • Article  

      Crystal/glass phase change in KSb5S8 studied through thermal analysis techniques 

      Chrissafis, K.; Kyratsi, Theodora; Paraskevopoulos, K. M.; Kanatzidis, M. G. (2004)
      The reversible crystal-glass and glass-crystal transitions discovered in KSb5S8 were studied in detail with nonisothermal scanning calorimetry techniques. When cooled, molten KSb5S8 becomes a metastable glass, which can ...
    • Article  

      Direct observation of ultrafast long-range charge separation at polymer-fullerene heterojunctions 

      Provencher, F.; Bérubé, N.; Parker, A. W.; Greetham, G. M.; Towrie, M.; Hellmann, C.; Côté, M.; Stingelin, N.; Silva, C.; Hayes, Sophia C. (2014)
      In polymeric semiconductors, charge carriers are polarons, which means that the excess charge deforms the molecular structure of the polymer chain that hosts it. This results in distinctive signatures in the vibrational ...
    • Article  

      Electronic structure of K 2Bi 8Se 13 

      Bilc, D. I.; Mahanti, S. D.; Kyratsi, Theodora; Chung, D. Y.; Kanatzidis, M. G.; Larson, P. (2005)
      K 2Bi 8Se 13 belongs to a class of complex chalcogenides that shows potential for superior thermoelectric performance. This compound forms in two distinct phases, α and β. The β phase, which has several sites with mixed ...
    • Article  

      Ferromagnetic and antiferromagnetic interactions in lanthanum cobalt oxide at low temperatures 

      Androulakis, J.; Katsarakis, N.; Giapintzakis, John (2001)
      Systematic dc and ac magnetic susceptibility studies have been performed on single-phase (formula presented) powder samples. Evidence is presented in support of the existence of ferromagnetic (FM1, FM2) and antiferromagnetic ...
    • Article  

      In vivo imaging of quantum dots encapsulated in phospholipid micelles 

      Dubertret, B.; Skourides, Paris A.; Norris, D. J.; Brivanlou, A. H.; Libchaber, A.; Noireaux, V. (2002)
      Fluorescent semiconductor nanocrystals (quantum dots) have the potential to revolutionize biological imaging, but their use has been limited by difficulties in obtaining nanocrystals that are biocompatible. To address this ...
    • Article  

      Lead halide perovskites and other metal halide complexes as inorganic capping ligands for colloidal nanocrystals 

      Dirin, D. N.; Dreyfuss, S.; Bodnarchuk, M. I.; Nedelcu, G.; Papagiorgis, Panagiotis; Itskos, Grigorios; Kovalenko, M. V. (2014)
      Lead halide perovskites (CH3NH3PbX3, where X = I, Br) and other metal halide complexes (MXn, where M = Pb, Cd, In, Zn, Fe, Bi, Sb) have been studied as inorganic capping ligands for colloidal nanocrystals. We present the ...
    • Article  

      Thermoelectric properties and site-selective Rb+/K+ distribution in the K2-xRbxBi8Se13 series 

      Kyratsi, Theodora; Chung, D. Y.; Ireland, J. R.; Kannewurf, C. R.; Kanatzidis, M. G. (2003)
      β-K2Bi8Se13 possesses promising thermoelectric properties whereas Rb2Bi8Se13 does not. The formation of solid solutions between these two compounds was attempted to study the alkali metal distribution in the structure and ...
    • Article  

      Thickness dependence of Hall transport in Ni1.15Mn 0.85Sb thin films on silicon 

      Branford, W. R.; Clowes, S. K.; Bugoslavsky, Y. V.; Gardelis, S.; Androulakis, J.; Giapintzakis, John; Grigorescu, C. E. A.; Manea, S. A.; Freitas, R. S.; Roy, S. B.; Cohen, L. F. (2004)
      Highly spin polarized Heusler alloys, NiMnSb and Co2MnSi, attract a great deal of interest as potential spin injectors for spintronic applications. Spintronic devices require control of interfacial properties at the ...
    • Article  

      The trapped human experiment 

      Huo, R.; Agapiou, Agapios; Bocos-Bintintan, V.; Brown, L. J.; Burns, C.; Creaser, C. S.; Devenport, N. A.; Gao-Lau, B.; Guallar-Hoyas, C.; Hildebrand, L.; Malkar, A.; Martin, H. J.; Moll, V. H.; Patel, P.; Ratiu, A.; Reynolds, J. C.; Sielemann, S.; Slodzynski, R.; Statheropoulos, Miltiades K.; Turner, M. A.; Vautz, W.; Wright, V. E.; Thomas, Charles Lawrence Paul (2011)
      This experiment observed the evolution of metabolite plumes from a human trapped in a simulation of a collapsed building. Ten participants took it in turns over five days to lie in a simulation of a collapsed building and ...