Wang Zhaozhao, Peng Linfa, Lin Zhongqin, Ni Jun, Yi Peiyun, Lai Xinmin, He Xiaolong, Lei Zeyu
State Key Laboratory of Mechanical System and Vibration, Department of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P.R. China.
Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, 48109-2125, USA.
Sci Rep. 2017 Oct 13;7(1):13155. doi: 10.1038/s41598-017-13655-y.
Mechanical flexibility and advanced light management have gained great attentions in designing high performance, flexible thin film photovoltaics for the realization of building-integrated optoelectronic devices and portable energy sources. This study develops a soft thermal nanoimprint process for fabricating nanostructure decorated substrates integrated with amorphous silicon solar cells. Amorphous silicon (a-Si:H) solar cells have been constructed on nanoholes array textured polyimide (PI) substrates. It has been demonstrated that the nanostructures not only are beneficial to the mechanical flexibility improvement but also contribute to sunlight harvesting enhancement. The a-Si:H solar cells constructed on such nanopatterned substrates possess broadband-enhanced light absorption, high quantum efficiency and desirable power conversion efficiency (PCE) and still experience minimal PCE loss even bending around 180°. The PCE performance without antireflection coatings increases to 7.70% and it improves 40% compared with the planar devices. Although the advantages and feasibility of the schemes are demonstrated only in the application of a-Si:H solar cells, the ideas are able to extend to applications of other thin film photovoltaics and semiconductor devices.
在设计用于实现建筑集成光电器件和便携式能源的高性能柔性薄膜光伏器件时，机械柔韧性和先进的光管理受到了广泛关注。本研究开发了一种软热纳米压印工艺，用于制造与非晶硅太阳能电池集成的纳米结构装饰基板。已在纳米孔阵列纹理化聚酰亚胺（PI）基板上构建了非晶硅（a-Si:H）太阳能电池。结果表明，纳米结构不仅有利于提高机械柔韧性，还有助于增强阳光捕获。在这种纳米图案化基板上构建的a-Si:H太阳能电池具有宽带增强光吸收、高量子效率和理想的功率转换效率（PCE），即使弯曲180°左右，PCE损失仍最小。无抗反射涂层时的PCE性能提高到7.70%，与平面器件相比提高了40%。尽管这些方案的优势和可行性仅在a-Si:H太阳能电池的应用中得到了证明，但这些想法能够扩展到其他薄膜光伏器件和半导体器件的应用中。
