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Photoconductivity and electroluminescence in lead iodide based natural quantum well structures

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
84
Issue
6
Identifiers
DOI: 10.1016/0038-1098(92)90210-z
Disciplines
  • Physics

Abstract

Abstract For the natural quantum well structures of (C 6H 5 - C 2H 4NH 3) 2 - PbI 4 and (C 6H 5 - C 2H 4NH 3) 2(CH 3NH 3) - Pb 2I 7, step-like features in the absorption and photo-current spectra were identified as 2D band edge transitions from their temperature dependence. Photocurrent along the c-axis is much smaller than that along the well plane, revealing the large anisotropy of the electronic band structure, and shows a plateau in the current-voltage curve, which can be explained in terms of Wannier-Stark localization in the materials. Electroluminescence from free excitons was observed at a relatively low field (10 kV cm -1) along the wells below 200 K.

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