Effects of Defects to the Performance of CdTe Pad Detectors in IBIC Measurements

Research output: Contribution to journalArticleScientificpeer-review

Abstract

We studied the impact of boundary walls and inclusions to the charge collection efficiency (CCE) of cadmium telluride (CdTe) pad detectors. By using ion beam-induced charge (IBIC) analysis, we were able to locate and classify various defects. We used 2-MeV protons that have a penetration depth of about 40 mu m in bulk CdTe. The detectors we measured had a surface area of 1 cm x 1 cm and a thickness of 1 mm. They were passivated either by using aluminum nitride (AlN) or by aluminum oxide (Al2O3) and had a mesh of titanium tungsten Schottky contacts on both anode and cathode sides. In this paper, we show the results of our measurements and analyze the potential impact of the found defects on the performance of CdTe detectors with Geant4 simulations.
Original languageEnglish
JournalIEEE Transactions on Nuclear Science
Volume66
Issue number5
Pages (from-to)846-851
Number of pages6
ISSN0018-9499
DOIs
Publication statusPublished - May 2019
MoE publication typeA1 Journal article-refereed

Fields of Science

  • Cadmium telluride (CdTe)
  • ion-beam-induced charge (IBIC)
  • X-RAY
  • CDZNTE
  • TRANSPORT
  • 114 Physical sciences

Cite this

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title = "Effects of Defects to the Performance of CdTe Pad Detectors in IBIC Measurements",
abstract = "We studied the impact of boundary walls and inclusions to the charge collection efficiency (CCE) of cadmium telluride (CdTe) pad detectors. By using ion beam-induced charge (IBIC) analysis, we were able to locate and classify various defects. We used 2-MeV protons that have a penetration depth of about 40 mu m in bulk CdTe. The detectors we measured had a surface area of 1 cm x 1 cm and a thickness of 1 mm. They were passivated either by using aluminum nitride (AlN) or by aluminum oxide (Al2O3) and had a mesh of titanium tungsten Schottky contacts on both anode and cathode sides. In this paper, we show the results of our measurements and analyze the potential impact of the found defects on the performance of CdTe detectors with Geant4 simulations.",
keywords = "Cadmium telluride (CdTe), ion-beam-induced charge (IBIC), X-RAY, CDZNTE, TRANSPORT, 114 Physical sciences",
author = "Matti Kalliokoski and Aneliya Karadzhinova-Ferrer and Jaakko H{\"a}rk{\"o}nen and Erik Br{\"u}cken and Maria Golovleva and Akiko G{\"a}dda and Vladyslav Litichevskyi and Panja Luukka and Jennifer Ott and Alexander Winkler",
year = "2019",
month = "5",
doi = "10.1109/TNS.2019.2912218",
language = "English",
volume = "66",
pages = "846--851",
journal = "IEEE Transactions on Nuclear Science",
issn = "0018-9499",
publisher = "IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC",
number = "5",

}

Effects of Defects to the Performance of CdTe Pad Detectors in IBIC Measurements. / Kalliokoski, Matti; Karadzhinova-Ferrer, Aneliya; Härkönen, Jaakko; Brücken, Erik; Golovleva, Maria; Gädda, Akiko; Litichevskyi, Vladyslav; Luukka, Panja; Ott, Jennifer; Winkler, Alexander.

In: IEEE Transactions on Nuclear Science, Vol. 66, No. 5, 05.2019, p. 846-851.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effects of Defects to the Performance of CdTe Pad Detectors in IBIC Measurements

AU - Kalliokoski, Matti

AU - Karadzhinova-Ferrer, Aneliya

AU - Härkönen, Jaakko

AU - Brücken, Erik

AU - Golovleva, Maria

AU - Gädda, Akiko

AU - Litichevskyi, Vladyslav

AU - Luukka, Panja

AU - Ott, Jennifer

AU - Winkler, Alexander

PY - 2019/5

Y1 - 2019/5

N2 - We studied the impact of boundary walls and inclusions to the charge collection efficiency (CCE) of cadmium telluride (CdTe) pad detectors. By using ion beam-induced charge (IBIC) analysis, we were able to locate and classify various defects. We used 2-MeV protons that have a penetration depth of about 40 mu m in bulk CdTe. The detectors we measured had a surface area of 1 cm x 1 cm and a thickness of 1 mm. They were passivated either by using aluminum nitride (AlN) or by aluminum oxide (Al2O3) and had a mesh of titanium tungsten Schottky contacts on both anode and cathode sides. In this paper, we show the results of our measurements and analyze the potential impact of the found defects on the performance of CdTe detectors with Geant4 simulations.

AB - We studied the impact of boundary walls and inclusions to the charge collection efficiency (CCE) of cadmium telluride (CdTe) pad detectors. By using ion beam-induced charge (IBIC) analysis, we were able to locate and classify various defects. We used 2-MeV protons that have a penetration depth of about 40 mu m in bulk CdTe. The detectors we measured had a surface area of 1 cm x 1 cm and a thickness of 1 mm. They were passivated either by using aluminum nitride (AlN) or by aluminum oxide (Al2O3) and had a mesh of titanium tungsten Schottky contacts on both anode and cathode sides. In this paper, we show the results of our measurements and analyze the potential impact of the found defects on the performance of CdTe detectors with Geant4 simulations.

KW - Cadmium telluride (CdTe)

KW - ion-beam-induced charge (IBIC)

KW - X-RAY

KW - CDZNTE

KW - TRANSPORT

KW - 114 Physical sciences

U2 - 10.1109/TNS.2019.2912218

DO - 10.1109/TNS.2019.2912218

M3 - Article

VL - 66

SP - 846

EP - 851

JO - IEEE Transactions on Nuclear Science

JF - IEEE Transactions on Nuclear Science

SN - 0018-9499

IS - 5

ER -