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Over 26% Efficiency SHJ Solar Cell Using Nano-Crystalline Silicon Layer
M. Yang, X. Ru, S. Yin, C. Hong, F. Peng, M. Qu, J. Lu, L. Fang, X. Xu
Bifacial, Heterojunction, µc-Si:H, n-Type, Amorphous Silicon
Silicon Materials and Cells
Subtopic: Low Temperature Route for Si Cells
Event: 8th World Conference on Photovoltaic Energy Conversion
Session: 1CP.2.2
ISBN: 3-936338-86-8
0,00 EUR
Document(s): presentation


In this presentation, the research of silicon heterojunction (SHJ) technology in LONGi Green Energy is mainly addressed with the analysis of high-efficiency SHJ solar cells. First, we reviews the milestones of our research on SHJ solar cells and the state-of-the-art cell architecture. The key factor to the high efficiency, especially over 26%, is the adoption of nano-crystalline doped silicon on both sides. Then, nano-crystalline doped silicon is mainly demonstrated, together with intrinsic amorphous silicon and transparent conductive oxide. Finally, the theoretical limiting efficiency, forged by Schmidt's formula, is updated that is 28.9% for SHJ solar cell.