Excess current/capacitance observation on polymer-fullerene bulk heterojunction, studied through I-V and C/G-V measurements


KAVAK P. , Menda U. D. , Parlak E. A. , ÖZDEMİR O. , Kutlu K.

SOLAR ENERGY MATERIALS AND SOLAR CELLS, vol.103, pp.199-204, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 103
  • Publication Date: 2012
  • Doi Number: 10.1016/j.solmat.2012.03.026
  • Journal Name: SOLAR ENERGY MATERIALS AND SOLAR CELLS
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.199-204

Abstract

Excess current/capacitance behavior was observed on the Ag:Ca/P3HT:PCBM/PEDOT:PSS/ITO structure and the associated mechanism(s) were identified by performing both dc current-voltage (I-V) and ac capacitance-conductance-voltage (C/G-V) measurements in dark and light exposure, respectively. The excess current/capacitance issue, originated owing to a minority carrier injection, has manifested itself as conductivity modulation in I-V and decrease in capacitance in C-V at a sufficiently large forward bias. Satisfactory analysis in I-V as transport property and C(G)-V as storage feature were carried out on Ag:Ca/P3HT:PCBM/PEDOT:PSS/ITO structure. (c) 2012 Elsevier B.V. All rights reserved.