STUDY ON PHOTOVOLTAIC PERFORMANCE OF QUASI-SINGLE CRYSTALLINE SILICON CELLS UNDER THINNING

Ma Shaobo; Li Jin; Qu Li; Ma Run; Wang Zhongliang

doi:10.19912/j.0254-0096.tynxb.2023-1140

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (11) : 170-177. DOI: 10.19912/j.0254-0096.tynxb.2023-1140

STUDY ON PHOTOVOLTAIC PERFORMANCE OF QUASI-SINGLE CRYSTALLINE SILICON CELLS UNDER THINNING

Ma Shaobo¹, Li Jin², Qu Li², Ma Run², Wang Zhongliang¹

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Abstract

Quokka2 software was used to simulate solar cells with quasi-single crystalline silicon as substrate, and the effect of silicon thickness on the conversion efficiency and power loss of quasi-single crystalline silicon solar cells with different oxygen content and bulk lifetime was studied. Compared with Czochralski monocrystalline silicon, quasi-single crystalline silicon has lower cost, more defects and lower oxygen content. By applying quasi-single crystalline silicon to passivated emitter and back contact cells （PERC） and interdigitated-back contact cells （IBC）, the photovoltaic performance of quasi-single crystalline silicon wafers in different cell structures was compared. The results show that the Shockley-Read Hall （SRH） composite loss also decreases up to 1.14 mW/cm² with the thickness of the silicon wafer dropping from 150 μm to 70 μm, but the short circuit current decreases by 0.95 mA/cm² at the same time, and the cell conversion efficiency is still improved to some extent under the mutual influence. Under thinning, the conversion efficiency of quasi-single crystalline PERC solar cell can reach 23.04%. The conversion efficiency of quasi-single crystalline IBC solar cell can reach 23.73%.

Key words

solar cells / thickness control / numerical simulation / quasi-single crystalline silicon / power loss analysis

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Ma Shaobo, Li Jin, Qu Li, Ma Run, Wang Zhongliang. STUDY ON PHOTOVOLTAIC PERFORMANCE OF QUASI-SINGLE CRYSTALLINE SILICON CELLS UNDER THINNING[J]. Acta Energiae Solaris Sinica. 2024, 45(11): 170-177 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1140

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