Publication date: 8th January 2019
Germanium (Ge)-based solar cells are being fabricated to be suited with active organic layers on the surface. In here, pentacene (Pn) and 6, 13-bis (triisopropylsilylethinyl)-pentacene (TIPS-Pn) are strongly recommended to be a candidate of singlet fission to enable subsequent exciton transfer into the cell, increasing device efficiency. Basic characteristics of the polyacenes thin films were performed via X-ray diffraction (XRD), atomic force microscope (AFM). XRD spectroscopy presented the crystallization of Pn and TIPS-Pn thin films thermally deposited with crystal orientations occurred in the range of 2 theta from 15 to 30o. In addition, AFM images displayed the difference morphology and roughness of the two organic layers, implying the TIPS causing the changes. For electrode optimization in Ge-based solar cell, TLM (transfer length measurement) method was applied to the Aluminium (Al) patterned on Ge substrate to study the contact resistance between Al and Ge. I-V curve results presented the good contact with Ohmic behavior.
This work was funded through ARC Centre of Excellence in Exciton Science. Support from ANFF-NSW is also acknowledged.
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