Thermo-and photostimulated depolarization in self-compensated CdF2:Ga and CdF2:In crystals

Shcheulin, A. S.; Kupchikov, A. K.; Ryskin, A. I.

doi:10.1134/1.1131028

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2005

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“…The electrons thus freed are localized on indium ions, forming a hydrogen-like donor state. The concentration of reduced In + ions was ~10 17 -10 18 1/cm 3 [8]. As a result, the crystal converted to an n-type semiconductor.…”

Section: Resultsmentioning

confidence: 87%

“…Completely absent were studies on the defect structure of crystalline Cd 1 -x R x F 2 + x , which were started in our laboratory [7]. Special attention, on the part of electrochemistry, to CdF 2 and solid solutions based on it is due to these being typical dielectrics (band gap 7.8 eV [8]); upon annealing in a reductive atmosphere (e.g. Cd vapor), both ionic and significant electronic components can simultaneously…”

Section: Introductionmentioning

confidence: 98%

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Ion Transfer in CdF2-based Iso- and Polyvalent Solid Solutions

et al. 2005

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The ionic conductivity of solid solution Cd 0.77 Sr 0.23 F 2 is 1.6 × 10 -4 S/cm at 500 K. The conduction mechanism changes from a vacancy mechanism to an interstitial one at 523-553 K. In solid solutions Cd 0.9 R 0.1 F 2.1 (R = La-Lu, Y), the activation enthalpy of conduction decreases from 0.9 to 0.8 eV with decreasing ionic radius of R 3+ , raising the 500-K conductivity from 6 × 10 -6 S/cm for La 3+ to 6 × 10 -5 S/cm for Lu 3+ . For crystalline Cd 0.95 In 0.05 F 2.05 , ionic and electronic conductivities at 313 K equal 5 × 10 -4 and 5 × 10 -6 S/cm.

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Section: Resultsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 98%