Modeling of columnar recombination for high-energy photon generated electrons and holes in amorphous selenium

被引：2

作者：

Hijazi, Nour ^{[1
]}

Kabir, M. Z. ^{[1
]}

机构：

[1] Concordia Univ, Dept Elect & Comp Engn, 1455 Blvd de Maisonneuve West, Montreal, PQ H3G 1M8, Canada

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2017年 / 28卷 / 10期

基金：

加拿大自然科学与工程研究理事会;

关键词：

STABILIZED A-SE; X-RAY PHOTOCONDUCTORS; CHARGE-TRANSPORT; IONIZATION; PHOTOGENERATION; SENSITIVITY;

D O I：

10.1007/s10854-016-6078-9

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An analytical model is developed to study the mechanisms of X-ray generated free Electron-hole pair (EHP) creation energy in amorphous selenium (a-Se) at high electric fields. The model is presented to show the electric field and temperature dependence of the charge extraction yield limited by the columnar recombination for the materials that have widely unequal drift mobility for electrons and holes, such as a-Se. The model is compared with Jaffe's columnar recombination model with widely varying field and temperature. In addition, the free EHP creation energy is calculated by incorporating the initial charge extraction yield and the charge collection efficacy of the free carriers. Also, the results of this model are compared with the recently published experimental results on EHP creation energy. The analysis of the results confirm that the proposed model gives the best possible explanation to the columnar recombination mechanisms in a-Se and the free EHP creation mechanisms at diagnostic X-ray exposures can be described by the columnar recombination.

引用

页码：7036 / 7041

页数：6

共 20 条

[1] Measurement of x-ray photogeneration in amorphous selenium [J].

Blevis, IM ;

Hunt, DC ;

Rowlands, JA .

JOURNAL OF APPLIED PHYSICS, 1999, 85 (11) :7958-7963

[2] Columnar recombination for X-ray generated electron-holes in amorphous selenium and its significance in a-Se x-ray detectors [J].

Bubon, O. ;

Jandieri, K. ;

Baranovskii, S. D. ;

Kasap, S. O. ;

Reznik, A. .

JOURNAL OF APPLIED PHYSICS, 2016, 119 (12)

[3] Amorphous selenium (a-Se) avalanche photosensor with metal electrodes [J].

Bubon, Oleksandr ;

DeCrescenzo, Giovanni ;

Rowlands, John A. ;

Reznik, Alla .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 2012, 358 (17) :2431-2433

[4] Defect levels and charge carrier photogeneration in amorphous selenium layers [J].

Ernelianova, EV ;

Qamhieh, N ;

Brinza, M ;

Adriaenssens, GJ ;

Kasap, SO ;

Johanson, RE ;

Arkhipov, VI .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 2003, 326 :215-219

[5] Signal formation in amorphous-Se-based x-ray detectors [J].

Fourkal, E ;

Lachaine, M ;

Fallone, BG .

PHYSICAL REVIEW B, 2001, 63 (19)

[6] Charge transport and electron-hole-pair creation energy in stabilized a-Se x-ray photoconductors [J].

Haugen, C ;

Kasap, SO ;

Rowlands, J .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1999, 32 (03) :200-207

[7] LANGEVIN RECOMBINATION OF DRIFTING ELECTRONS AND HOLES IN STABILIZED A-SE (CL-DOPED A-SE-0.3-PERCENT-AS) [J].

HAUGEN, C ;

KASAP, SO .

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1995, 71 (01) :91-96

[8]

Hijazi N., 2015, J MATER SCI-MATER EL, V27, P7534

[9]

Jaffe G, 1913, ANN PHYS-BERLIN, V42, P303

[10] IMPACT IONIZATION AND MOBILITIES OF CHARGE-CARRIERS AT HIGH ELECTRIC-FIELDS IN AMORPHOUS SELENIUM [J].

JUSKA, G ;

ARLAUSKAS, K .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1980, 59 (01) :389-393

← 1 2 →