The frequency dependent electrical characteristics of Sn/p-InP Schottky barrier diodes (SBDs)


Korucu D., Altindal Ş., Mammadov T. S. , Oezcelik S.

OPTOELECTRONICS AND ADVANCED MATERIALS-RAPID COMMUNICATIONS, vol.2, no.9, pp.525-529, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 2 Issue: 9
  • Publication Date: 2008
  • Journal Name: OPTOELECTRONICS AND ADVANCED MATERIALS-RAPID COMMUNICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.525-529
  • Keywords: Sn/p-InP SBDs, frequency and voltage dependence, interface states, series resistance, SERIES RESISTANCE, INTERFACE STATES, VOLTAGE CHARACTERISTICS, TEMPERATURE, CAPACITANCE, PROFILE, PLOT
  • Gazi University Affiliated: Yes

Abstract

The frequency and bias voltage dependent of the capacitance-voltage (C-V) and conductance-voltage (G/w-V) characteristics of Sn/p-InP Schottky barrier diodes (SBDs) were investigated in the frequency range of 100 kHz-7 MHz at room temperature. Experimental data shows that the measured capacitance (C-m) and conductance (G(m)/w) increase with decreasing frequency due to a continuous distribution of (N-ss) and the effect of series resistance (R-s). These changes in the C-m and G(m)/w especially are found noticeable at low frequencies. The variation of the R-s and N-ss for the Sn/p-InP SBD obtained from C-m-V and G(m)/w-V characteristics using Nicollian and Goetzberger and Hill's methods, respectivelly. The distribution profile of R-s-V gives two peaks in the inversion and accumulation region, respectively, at low frequencies and these peaks disappear with increasing frequencies. Also, the energy-density distribution profile of interface states exponentially decreases with increasing frequency. Experimental results confirm that the values of N-ss and R-s of the Sn/pInP SBDs are important parameters which strongly influence the C-m-V and G(m)/w-V measurements.