Molybdenum oxide thin films in CdTe-based electronic and optoelectronic devices

Abstract

This paper reports on the both possible applications of molybdenum oxide (MoOx) thin films in combination with hole or electron conducting CdTe. The high quality ohmic contancts and strongly rectifying photodiodes were prepared by the DC magnetron sputtering of MoOx thin films onto freshly cleaved p‐ and n‐type CdTe single crystal substrates. The analysis of DC and AC electrical properties of the MoOx/ p‐CdTe ohmic contact was carried out. The dominating current transport mechanisms through the MoOx/p‐CdTe heterojunction at forward and reverse bias were determined. The unoptimized heterojunction photodiode showed promising rectifying and photoelectrical characteristics for practical application in the photoconductive mode. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)

Diodes based on semi‐insulating CdTe crystals with Mo/MoOx contacts for X‐ and γ‐ray detectors

“…The measured values of the conductivity and carrier concentration at 295 K for the MoO x thin films was equal to σ = 150 Ω −1 cm −1 and n = 8.47 × 10 17 сm −3 , respectively. Additional information about the properties of the MoO x thin films can be found in our previous work .…”

Insights into post-growth doping and proposals for CdTe:In photovoltaic devices

“…Another work on MBE-grown epitaxial p-ZnTe/n-CdTe reports dark diode behavior, but no PV response [35]. Heterojunctions with n-CdTe have also been attempted on single crystal CdTe wafers coated with p-diamond (0.1%) [47], p-NiO x (0.001%) [48] and MoO x (no power conversion efficiency) [49,50].…”

Visible to Near‐Infrared Photodiodes with Advanced Radiation Resistance

“…Transparent and conductive transition metal oxides, including molybdenum (VI) oxide, have found a wide application in electronic, optoelectronic, and photovoltaic devices. [ 53,54 ] Moreover, MoO 3 layers are used in gamma‐ray shielding applications. [ 55–58 ] It is known that gamma radiation exhibits a noticeable impact on the stretching vibration of Mo–O and bending vibrations of Mo–O–Mo in α‐MoO 3 nanoparticles.…”