RESEARCH ON TiCxOy ELECTRON-SELETIVE CONTACTS FOR SILLICON HETROJUCTION SOLAR CELLS

Sun Biao; Ding Yang; Huang Zhiping; Chen Jingwei; Wei Deyuan; Xu Ying

doi:10.19912/j.0254-0096.tynxb.2022-0299

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (7) : 141-146. DOI: 10.19912/j.0254-0096.tynxb.2022-0299

RESEARCH ON TiC_xO_y ELECTRON-SELETIVE CONTACTS FOR SILLICON HETROJUCTION SOLAR CELLS

Sun Biao¹, Ding Yang¹, Huang Zhiping^1,2, Chen Jingwei¹, Wei Deyuan³, Xu Ying¹

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Abstract

This article reports TiC_xO_y as a novel dopant-free electron-transport material. TiC_xO_y is a mixed-phase material which is composed of the dominant amorphous phase and a small proportion of crystalline phase. TiC_xO_y material has a low work function of about 4.1 eV and a wide bandgap of 2.63 eV, realizing 0 eV energy barrier for electrons transport and high blocking energy barrier of 1.64 eV for holes transport. A low contract resistivity of 17.74 mΩ·cm² has been realized for TiC_xO_y/n-Si heterocontact, realizing the function of electron-selective transport. TiC_xO_y thin film was applied for the full-area, rear-side electron-transport layer of n-type silicon heterojunction solar cell. As a result, the introduction of TiC_xO_y thin film significantly increases open-circuit voltages and fill factors of solar cells, and the absolute conversation efficiency of champion solar cell is promoted by 3%.

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solar cells / silicon heterojunction / dopant-free / electron-selective contact

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Sun Biao, Ding Yang, Huang Zhiping, Chen Jingwei, Wei Deyuan, Xu Ying. RESEARCH ON TiC_xO_y ELECTRON-SELETIVE CONTACTS FOR SILLICON HETROJUCTION SOLAR CELLS[J]. Acta Energiae Solaris Sinica. 2023, 44(7): 141-146 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0299

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