薄脆饼
硅
材料科学
晶体硅
光伏
光电子学
GSM演进的增强数据速率
纳米技术
工程物理
光伏系统
电气工程
计算机科学
工程类
电信
作者
Wenzhu Liu,Yujing Liu,Ziqiang Yang,Chang‐Qing Xu,Xiaodong Li,Shenglei Huang,Jianhua Shi,Junling Du,Anjun Han,Yuhao Yang,Guoning Xu,Jian Yu,Jiajia Ling,Jun Peng,Liping Yu,Bin Ding,Yuan Gao,Kai Jiang,Zhenfei Li,Yanchu Yang
出处
期刊:Nature
[Nature Portfolio]
日期:2023-05-24
卷期号:617 (7962): 717-723
被引量:243
标识
DOI:10.1038/s41586-023-05921-z
摘要
Flexible solar cells have a lot of market potential for application in photovoltaics integrated into buildings and wearable electronics because they are lightweight, shockproof and self-powered. Silicon solar cells have been successfully used in large power plants. However, despite the efforts made for more than 50 years, there has been no notable progress in the development of flexible silicon solar cells because of their rigidity1-4. Here we provide a strategy for fabricating large-scale, foldable silicon wafers and manufacturing flexible solar cells. A textured crystalline silicon wafer always starts to crack at the sharp channels between surface pyramids in the marginal region of the wafer. This fact enabled us to improve the flexibility of silicon wafers by blunting the pyramidal structure in the marginal regions. This edge-blunting technique enables commercial production of large-scale (>240 cm2), high-efficiency (>24%) silicon solar cells that can be rolled similarly to a sheet of paper. The cells retain 100% of their power conversion efficiency after 1,000 side-to-side bending cycles. After being assembled into large (>10,000 cm2) flexible modules, these cells retain 99.62% of their power after thermal cycling between -70 °C and 85 °C for 120 h. Furthermore, they retain 96.03% of their power after 20 min of exposure to air flow when attached to a soft gasbag, which models wind blowing during a violent storm.
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