/Optoelectronic characterization of thin film solar cells

Optoelectronic characterization of thin film solar cells

Genk | More than two weeks ago

Shape the future of solar cell technology

Next to Si-based solar cells, devices based on chalcogenide thin films, such as CdTe and Cu(In,Ga)Se2 (CIGS), are at the forefront of solar cell technology. CIGS technology, as one of the main thin-film competitors of technology leader Silicon, has exceeded record module and cell efficiencies of 17% and 23%, respectively. However, reliance on the heavy metal Cd and on the non abundant element In presents a major barrier towards meeting the multi-terawatt-scale target for renewable energy supplied by photovoltaics. Kesterite materials such as Cu2ZnSnSe4 or Cu2ZnGeSe4 are emerging alternative chalcogenide solar cell absorbers that provide diversification away from the non-earth-abundant elements mentioned above.

 

This master thesis topic consists of the fabrication, characterization and optimization of thin film chalcogenide materials (CIGS or Kesterite) on glass substrates using a two step process. This process involves first the deposition of metal layers, followed by the selenization process in H2Se gas. Physical and optoelectronic characterization of the fabricated layers will be performed before the layers will be turned into solar cells. The fabricated layers will be characterized by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). Electrical measurements to be performed on the solar cells consist of current-voltage (I-V) and capacitance-voltage (C-V) measurements. Optical measurements to be performed consist of temperature and intensity dependent photoluminescence (PL) and time-resolved photoluminescence (TR-PL) measurements. These measurements will allow further insight into the different recombination mechanisms in the solar cells. The different characterizations will be linked to the growth of the absorber in order to optimize the absorber quality for thin film solar cell applications.

 

Optoelectronic

Type of project: Thesis, Internship, Combination of internship and thesis

Duration: 6 to 12 months

Required degree: Master of Engineering Technology, Master of Engineering Science

Required background: Energy, Electrotechnics/Electrical Engineering, Materials Engineering, Nanoscience & Nanotechnology, Physics

Supervising scientist(s): For further information or for application, please contact: Guy Brammertz (Guy.Brammertz@imec.be)

Imec allowance will be provided for students studying at a non-Belgian university.

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