Investigation of thermally evaporated high resistive B-doped amorphous selenium alloy films and metal contact studies

Cihan Oner; Khai V. Nguyen; Rahmi O. Pak; Mohammad A. Mannan; Krishna C. Mandal

doi:10.1117/12.2196586

26 August 2015 Investigation of thermally evaporated high resistive B-doped amorphous selenium alloy films and metal contact studies

Cihan Oner, Khai V. Nguyen, Rahmi O. Pak, Mohammad A. Mannan, Krishna C. Mandal

Author Affiliations +

Proceedings Volume 9593, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XVII; 95931I (2015) https://doi.org/10.1117/12.2196586
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

Amorphous selenium (a-Se) alloy materials with arsenic, chlorine, boron, and lithium doping were synthesized for room temperature nuclear radiation detector applications using an optimized alloy composition for enhanced charge transport properties. A multi-step synthetic process has been implemented to first synthesize Se-As and Se-Cl master alloys from zone-refined Se (~ 7N), and then synthesized the final alloys for thermally evaporated large-area thin-film deposition on oxidized aluminum (Al/Al²O₃) and indium tin oxide (ITO) coated glass substrates. Material purity, morphology, and compositional characteristics of the alloy materials and films were examined using glow discharge mass spectroscopy (GDMS), inductively coupled plasma mass spectroscopy (ICP-MS), differential scanning calorimetry (DSC), x-ray photoelectron spectroscopy (XPS), x-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive analysis by x-rays (EDAX). Current-Voltage (I-V) measurements were carried out to confirm very high resistivity of the alloy thin-films. We have further investigated the junction properties of the alloy films with a wide variety of metals with different work functions (Au, Ni, W, Pd, Cu, Mo, In, and Sn). The aim was to investigate whether the choice of metal can improve the performance of fabricated detectors by minimizing the dark leakage current. For various metal contacts, we have found significant dependencies of metal work functions on current transients by applying voltages from -800 V to +1000 V.

Citation Download Citation

Cihan Oner, Khai V. Nguyen, Rahmi O. Pak, Mohammad A. Mannan, and Krishna C. Mandal "Investigation of thermally evaporated high resistive B-doped amorphous selenium alloy films and metal contact studies", Proc. SPIE 9593, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XVII, 95931I (26 August 2015); https://doi.org/10.1117/12.2196586

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
11 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Chlorine

Metals

Selenium

Sensors

Glasses

Scanning electron microscopy

Gold

Show All Keywords

Keywords/Phrases

Search In:

Publication Years