2023-05-04 オランダ・デルフト工科大学（TUDelft)
◆この新しい層は、従来の太陽電池よりもはるかに抵抗が少なく、より高い変換効率をもたらす。LONGi Green Energy Technology Co.、Sun Yat-Sen University、Delft University of Technologyの3つのグループが協力して、この新しい層を最適化し、太陽電池のデザインを最適化した。この太陽電池は、世界の再生可能エネルギーへの移行において重要な役割を果たすことが期待される。
＜関連情報＞
- https://www.tudelft.nl/en/2023/tu-delft/a-breakthrough-that-makes-solar-panels-better-than-ever
- https://www.nature.com/articles/s41560-023-01255-2
電気的に最適化されたナノ結晶シリコン正孔接触層により最大26.81%の効率を達成したシリコンヘテロ接合太陽電池 Silicon heterojunction solar cells with up to 26.81% efficiency achieved by electrically optimized nanocrystalline-silicon hole contact layers
Hao Lin,Miao Yang,Xiaoning Ru,Genshun Wang,Shi Yin,Fuguo Peng,Chengjian Hong,Minghao Qu,Junxiong Lu,Liang Fang,Can Han,Paul Procel,Olindo Isabella,Pingqi Gao,Zhenguo Li & Xixiang Xu
Nature Energy Published:04 May 2023
DOI:https://doi.org/10.1038/s41560-023-01255-2
Abstract
Silicon heterojunction (SHJ) solar cells have reached high power conversion efficiency owing to their effective passivating contact structures. Improvements in the optoelectronic properties of these contacts can enable higher device efficiency, thus further consolidating the commercial potential of SHJ technology. Here we increase the efficiency of back junction SHJ solar cells with improved back contacts consisting of p-type doped nanocrystalline silicon and a transparent conductive oxide with a low sheet resistance. The electrical properties of the hole-selective contact are analysed and compared with a p-type doped amorphous silicon contact. We demonstrate improvement in the charge carrier transport and a low contact resistivity (<5 mΩ cm2). Eventually, we report a series of certified power conversion efficiencies of up to 26.81% and fill factors up to 86.59% on industry-grade silicon wafers (274 cm2, M6 size).
