Abstract
A localized back surface field (LBSF) cell was developed using boron laser doping (LD) and screen-printed aluminum paste firing to produce p-type passivated emitter, rear locally diffused cells with the objective of further enhancing the efficiency of the cell. After LD, the B dopant depth was over 6.0μm and the B surface concentration was 1 × 1019 atoms/cm3. The Al paste was screen-printed and fired to form electrodes, and the LBSF composed of Al and B was observed using scanning capacitance microscopy. Secondary ion mass spectrometry was used to detect the B dopant in the LBSF area after firing the Al paste to clarify the reason for the improvement in the performance of the cell, and the ratio of B/Al was determined to be more than 0.9 wt%. The LBSF cell had an efficiency of 19.5%, which exceeded that of the reference cell by ∼1.1%, and the open circuit voltage of the cell improved remarkably. This indicated that the B content resulting from LD influenced Al diffusion and enhanced the LBSF effect.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
