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Dislocation and Saturation Current Density Analysis by Rear-Side Al Amount Variation for n-Type Al-p+ Emitter Crystalline Silicon Solar Cell

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This paper presents a dislocation and saturation of current density analysis by varying the amount of rear-side Al. The fabrication process optimizes an aluminum-alloyed emitter using a screen printing number and varying the co-firing on n-type crystalline silicon (c-Si) wafers using a suitable industry method. N-type silicon materials have high diffusion-lengths due to the reduced recombination activities of metal impurities and other nonmetallic defects compared with p-type silicon and this fulfills the requirement for innovative solar cells. To utilize the advantage of the n-type silicon wafers for manufacturing simple and industrially feasible high-efficiency solar cells, we adopted screen-printing and co-firing of aluminum (Al) alloyed n + n p + solar cells featuring a rear Al-p+ emitter easily fabricated through the screen-printing process. We achieved a back surface field (BSF) that was 7 μm in thickness by applying 13.14 mg/cm2 of Al paste in by printing on both sides and heating the material in an high temperature infra-red (IR) furnace at a peak temperature of 756.5 °C. In the furnace, the temperature increased at a rate of 70.82 °C/sec with an efficiency of 17.36%, saturation current density J 01 of 7.16 × 10–9 mA/cm2 and J 02 of 3.55 × 10–5 mA/cm2, respectively.
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Keywords: AL-P+ EMITTER; DISLOCATION; N-TYPE SILICON SOLAR CELL; SATURATION CURRENT DENSITY

Document Type: Research Article

Publication date: March 1, 2016

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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