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J Nanosci Nanotechnol. 2018 Jul 1;18(7):5013-5019. doi: 10.1166/jnn.2018.15318.

Analysis of Laser Injection Condition and Electrical Properties in Local BSF for Laser Fired Contact c-Si Solar Cell Applications.

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Department of Energy Science, Sungkyunkwan University, Suwon, 440-746, Korea.
School of Electronic Electrical Engineering, College of Information and Communication Engineering, Sungkyunkwan University, Suwon, 440-746, Korea.
Department of Materials Science and Engineering, Korea University, Anam-Dong 5-1, Seongbuk-gu, Seoul, 136-701, Korea.


A crystalline silicon (c-Si) local-back-contact (LBC) solar cell for which a laser-condition-optimized surface-recombination velocity (SRV), a contact resistance (Rc), and local back surface fields (LBSFs) were utilized is reported. The effect of the laser condition on the rear-side electrical properties of the laser-fired LBC solar cell was studied. The Nd:YAG-laser (1064-nm wavelength) power and frequency were varied to obtain LBSF values with a lower contact resistance. A 10-kHz laser power of 44 mW resulted in an Rc of 0.125 ohms with an LBSF thickness of 2.09 μm and a higher open-circuit voltage (VOC) of 642 mV.


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