Charge Transfer from Carbon Nanotubes to Silicon in Flexible Carbon Nanotube/Silicon Solar Cells,Small

当前位置： X-MOL 学术 › Small › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Charge Transfer from Carbon Nanotubes to Silicon in Flexible Carbon Nanotube/Silicon Solar Cells
Small ( IF 13.0 ) Pub Date : 2017-11-10 , DOI: 10.1002/smll.201702387
Xiaokai Li ₁ , Marina Mariano ₁ , Lyndsey McMillon-Brown ₁ , Jing-Shun Huang ₁ , Matthew Y. Sfeir ₂ , Mark A. Reed _{3,

4} , Yeonwoong Jung ₅ , André D. Taylor ₁

Affiliation

Mechanical fragility and insufficient light absorption are two major challenges for thin flexible crystalline Si‐based solar cells. Flexible hybrid single‐walled carbon nanotube (SWNT)/Si solar cells are demonstrated by applying scalable room‐temperature processes for the fabrication of solar‐cell components (e.g., preparation of SWNT thin films and SWNT/Si p–n junctions). The flexible SWNT/Si solar cells present an intrinsic efficiency ≈7.5% without any additional light‐trapping structures. By using these solar cells as model systems, the charge transport mechanisms at the SWNT/Si interface are investigated using femtosecond transient absorption. Although primary photon absorption occurs in Si, transient absorption measurements show that SWNTs also generate and inject excited charge carriers to Si. Such effects can be tuned by controlling the thickness of the SWNTs. Findings from this study could open a new pathway for designing and improving the efficiency of photocarrier generation and absorption for high‐performance ultrathin hybrid SWNT/Si solar cells.

中文翻译：

柔性碳纳米管/硅太阳能电池中碳纳米管向硅的电荷转移

机械脆性和光吸收不足是薄的柔性晶体硅基太阳能电池的两个主要挑战。通过应用可扩展的室温工艺来制造太阳能电池组件（例如，准备SWNT薄膜和SWNT / Si p–n结），展示了柔性混合单壁碳纳米管（SWNT）/ Si太阳能电池。柔性SWNT / Si太阳能电池的固有效率约为7.5％，而无需任何其他的光捕获结构。通过将这些太阳能电池用作模型系统，使用飞秒瞬态吸收研究了SWNT / Si界面处的电荷传输机制。尽管主要的光子吸收发生在Si中，但瞬态吸收测量结果表明，SWNT还会生成激发的电荷载流子并将其注入Si中。可以通过控制SWNT的厚度来调整这种效果。这项研究的发现可能为设计和提高高性能超薄混合SWNT / Si太阳能电池的光生载流子产生和吸收效率开辟一条新途径。

更新日期：2017-11-10

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11