A wet-chemical surface texturing technique, including a two-step metal-catalyzed chemical etching (MCCE) and an extra alkaline treatment, has been proven as an efficient way to fabricate high-efficiency black multicrystalline (mc) silicon solar cells, whereas it is limited by the production capacity and the cost cutting due to the complicated process. Here, we demonstrated that with careful control of the composition in etching solution, low-aspect-ratio bowl-like nanostructures with atomically smooth surfaces could be directly achieved by improved one-step MCCE and with no posttreatment, like alkali solution. The doublet surface texture of implementing this nanobowl structure upon the industrialized acidic-textured surface showed concurrent improvement in optical and electrical properties for realizing 18.23% efficiency mc-Si solar cells (156 mm × 156 mm), which is sufficiently higher than 17.7% of the solely acidic-textured cells in the same batch. The one-step MCCE method demonstrated in this study may provide a cost-effective way to manufacture high-performance mc-Si solar cells for the present photovoltaic industry. © 2016 IEEE.
|Original language||English (US)|
|Number of pages||6|
|Journal||IEEE Journal of Photovoltaics|
|State||Published - May 20 2016|
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was supported by the Zhejiang Provincial Natural Science Foundation under Grant LY14F040005 and Grant LR16F040002; the National Natural Science Foundation of China under Grant 61404144, Grant 11304132, Grant 11304133, and Grant 61376068; the International S&T Cooperation Program of Ningbo under Grant 2015D10021; the "Thousand Young Talents Program" of China; and the One Hundred Person Project of the Chinese Academy of Sciences.