Fluorescence from <i>X</i> traps in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">C</mi></mrow><mrow><mn>60</mn></mrow></msub></mrow></math></span> single crystals

W. Guss; J. Feldmann; E. O. Göbel; C. Taliani; H. Mohn; W. Müller; P. Häussler; H.-U. ter Meer

doi:10.1103/PhysRevLett.72.2644

Fluorescence from X traps in $C_{60}$ single crystals

W. Guss, J. Feldmann, E. O. Göbel, C. Taliani, H. Mohn, W. Müller, P. Häussler, and H.-U. ter Meer

Phys. Rev. Lett. 72, 2644 – Published 18 April 1994

Abstract

We show that low-temperature fluorescence spectra of large high-quality $C_{60}$ single crystals are mainly composed of several, independent pairs of $T_{1 g}$ false origins. In analogy to the case of anthracene single crystals the series of emission bands can be interpreted in terms of exciton (Frenkel) emission from so-called X traps. Temperature dependent luminescence experiments support this interpretation.