PhD (NTNU)

October 2010 – October 2014 (NTNU, 4 years)

Title: Cr-doped ZnS for Intermediate Band Solar Cells  (download abstract)

Trial lecture title: Highly mismatched alloys for optoelectronics. (see the slides here)

Pulsed laser deposition of ZnS and transition metal doped ZnS:

(a) The rectangular ablated area on the target showing the X and Y scanning directions. (b) Image of the target, and the visible plasma plume. (c) The film after ablation still on the heater. (d) RHEED pattern of the Si substrate just before the deposition and (e) ZnS film after the deposition.
(a) The rectangular ablated area on the target showing the X and Y scanning directions. (b) Image of the target, and the visible plasma plume. (c) The film after ablation still on the heater. (d) RHEED pattern of the Si substrate just before the deposition and (e) ZnS film after the deposition.
Cross-section SEM image of a single hetero-junction cell with ZnS. The top layer is the Au/Al contact
Cross-section SEM image of a single hetero-junction cell with ZnS. The top layer is the Au/Al contact
Schematic structure of the solar cells studied. (a) A single hetero-junction cell with Cr:ZnS, and (b) with ZnS. (c) A double hetero-junction cell with Cr:ZnS, and (d) with ZnS.
Schematic structure of the solar cells studied. (a) A single hetero-junction cell with Cr-doped ZnS, and (b) with ZnS. (c) A double hetero-junction cell with Cr-doped ZnS, and (d) with ZnS.