Publication detail

Transportní a šumové charakteristiky senzorů na bázi CdTe

GRMELA, L., ŠIKULA, J., ZAJAČEK, J., DOBIS, P., MORAVEC, P.

Original Title

Transport and Noise Characteristics of CdTe Sensors

Czech Title

Transport and Noise Characteristics of CdTe Sensors

English Title

Transportní a šumové charakteristiky senzorů na bázi CdTe

Type

conference paper

Language

cs

Original Abstract

Experimental studies of transport and noise characteristics of CdTe sensors have been carried out. There are three different 1/f noise sources; bulk and surface 1/f which is proportional to square of current and contact 1/f noise with current noise spectral density proportional to higher than second power of current. Experimental results are used to characterize contact technology preparation. Contact prepare by deposition of gold from aqueous solution of AuCl3. Low and high ohmic samples reveal contact resistance. This one is dominant noise sources for low ohmic samples, while high ohmic samples are sources 1/f with dominant mobility fluctuation. Hooge constant alpha = 1.5x10-3 is very near to theoretical. Noise spectral density of sample with dominant contact noise is proportion to In with n>2. High resistance samples reveal in frequency range f > 100 Hz shot noise with spectral density corresponding to theoretical one. Noise equivalent power (NEP) and sensitivity characteristics were evaluated.

Czech abstract

Experimental studies of transport and noise characteristics of CdTe sensors have been carried out. There are three different 1/f noise sources; bulk and surface 1/f which is proportional to square of current and contact 1/f noise with current noise spectral density proportional to higher than second power of current. Experimental results are used to characterize contact technology preparation. Contact prepare by deposition of gold from aqueous solution of AuCl3. Low and high ohmic samples reveal contact resistance. This one is dominant noise sources for low ohmic samples, while high ohmic samples are sources 1/f with dominant mobility fluctuation. Hooge constant alpha = 1.5x10-3 is very near to theoretical. Noise spectral density of sample with dominant contact noise is proportion to In with n>2. High resistance samples reveal in frequency range f > 100 Hz shot noise with spectral density corresponding to theoretical one. Noise equivalent power (NEP) and sensitivity characteristics were evaluated.

English abstract

Experimental studies of transport and noise characteristics of CdTe sensors have been carried out. There are three different 1/f noise sources; bulk and surface 1/f which is proportional to square of current and contact 1/f noise with current noise spectral density proportional to higher than second power of current. Experimental results are used to characterize contact technology preparation. Contact prepare by deposition of gold from aqueous solution of AuCl3. Low and high ohmic samples reveal contact resistance. This one is dominant noise sources for low ohmic samples, while high ohmic samples are sources 1/f with dominant mobility fluctuation. Hooge constant alpha = 1.5x10-3 is very near to theoretical. Noise spectral density of sample with dominant contact noise is proportion to In with n>2. High resistance samples reveal in frequency range f > 100 Hz shot noise with spectral density corresponding to theoretical one. Noise equivalent power (NEP) and sensitivity characteristics were evaluated.

Keywords

Noise, 1/f noise, contact 1/f noise, mobility fluctuation, GR spectra

RIV year

2005

Released

15.09.2005

Publisher

Ing. Zdeněk Novotný, CSc., Brno, Ondráčkova 105

Location

Brno

ISBN

80-214-2990-9

Book

Electronic Devices and Systems

Pages from

288

Pages to

293

Pages count

6

BibTex


@inproceedings{BUT20901,
  author="Lubomír {Grmela} and Josef {Šikula} and Jiří {Zajaček} and Pavel {Dobis} and Pavel {Moravec}",
  title="Transport and Noise Characteristics of CdTe Sensors",
  annote="Experimental studies of transport and noise characteristics of CdTe sensors have been carried out. There are three different 1/f noise sources; bulk and surface 1/f which is proportional to square of current and contact 1/f noise with current noise spectral density proportional to higher than second power of current. Experimental results are used to characterize contact technology preparation. Contact prepare by deposition of gold from aqueous solution of AuCl3. Low and high ohmic samples reveal contact resistance. This one is dominant noise sources for low ohmic samples, while high ohmic samples are sources 1/f with dominant mobility fluctuation. Hooge constant alpha = 1.5x10-3 is very near to theoretical. Noise spectral density of sample with dominant contact noise is proportion to In with n>2. High resistance samples reveal in frequency range f > 100 Hz shot noise with spectral density corresponding to theoretical one. Noise equivalent power (NEP) and sensitivity characteristics were evaluated.",
  address="Ing. Zdeněk Novotný, CSc., Brno, Ondráčkova 105",
  booktitle="Electronic Devices and Systems",
  chapter="20901",
  institution="Ing. Zdeněk Novotný, CSc., Brno, Ondráčkova 105",
  year="2005",
  month="september",
  pages="288",
  publisher="Ing. Zdeněk Novotný, CSc., Brno, Ondráčkova 105",
  type="conference paper"
}