Toward Ge-based Singlet Fission Solar Cells
Minh Triet Nguyen a, Dane McCamey a
a School of Physics, University of New South Wales
Proceedings of Interfaces in Organic and Hybrid Thin-Film Optoelectronics (INFORM)
València, Spain, 2019 March 5th - 7th
Organizers: Natalie Stingelin, Henk Bolink and Michele Sessolo
Poster, Minh Triet Nguyen, 092
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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