Fabrication of interdigitated back-contact (IBC) solar cells with screen-printed boron doped emitters

Aliefendioğlu, Ateşca
Interdigitated back-contact (IBC) solar cells with their unique structure, having both n and p doped regions as well all as contacts at the rear side, have the potential to achieve high-efficiency values. The record efficiency value at industrial scale have reached 25.2% for mono-crystalline silicon. This thesis focuses on the development of IBC cell structure which is one of the best performing cell structures. The scope of this thesis requires the full understanding of controlling the boron doping on an n-type wafer for decent process optimisation using Boron doping paste. The thesis also aims for the study of the necessary characterisation techniques, i.e. sheet resistance measurements, and electrochemical capacitance-voltage (ECV) profiling. Corresponding cell fabrication is based on screen-printing of Boron doping paste, annealing, and following metallisation steps. The bifacial structure is also demonstrated as a secondary proof-of-concept. The produced cells have been characterised and analysed with 8.70% efficiency on IBC and 7.43% efficiency on bifacial structures.


Ciftpinar, Emine Hande; Turan, Raşit; Yerci, Selçuk; Department of Micro and Nanotechnology (2022-4-22)
The design and development of high-efficiency interdigitated back contact (IBC) solar cells have been studied within the scope of this thesis. Developing a totally industry-compatible, lithography-free, high-throughput process flow for IBC cell fabrication was the main motivation of the thesis. For this, a detailed simulation study was conducted using Quokka 2 software to optimize the rear side cell geometry and understand the effect of bulk and layer properties on the device performance. After determining ...
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Citation Formats
A. Aliefendioğlu, “Fabrication of interdigitated back-contact (IBC) solar cells with screen-printed boron doped emitters,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Physics., Middle East Technical University, 2020.