Colloidal Antireflection Coating Improves Graphene鈥揝ilicon Solar Cells

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• 作者：Enzheng Shi ; Hongbian Li ; Long Yang ; Luhui Zhang ; Zhen Li ; Peixu Li ; Yuanyuan Shang ; Shiting Wu ; Xinming Li ; Jinquan Wei ; Kunlin Wang ; Hongwei Zhu ; Dehai Wu ; Ying Fang ; Anyuan Cao
• 刊名：Nano Letters
• 出版年：2013
• 出版时间：April 10, 2013
• 年：2013
• 卷：13
• 期：4
• 页码：1776-1781
• 全文大小：456K
• 年卷期：v.13,no.4(April 10, 2013)
• ISSN：1530-6992

文摘

Carbon nanotube-Si and graphene-Si solar cells have attracted much interest recently owing to their potential in simplifying manufacturing process and lowering cost compared to Si cells. Until now, the power conversion efficiency of graphene-Si cells remains under 10% and well below that of the nanotube-Si counterpart. Here, we involved a colloidal antireflection coating onto a monolayer graphene-Si solar cell and enhanced the cell efficiency to 14.5% under standard illumination (air mass 1.5, 100 mW/cm²) with a stable antireflection effect over long time. The antireflection treatment was realized by a simple spin-coating process, which significantly increased the short-circuit current density and the incident photon-to-electron conversion efficiency to about 90% across the visible range. Our results demonstrate a great promise in developing high-efficiency graphene-Si solar cells in parallel to the more extensively studied carbon nanotube-Si structures.

Keywords:

Graphene; silicon; antireflection layer; TiO₂ colloid; solar cell