Department of Chemistry, University of Kansas , Lawrence, Kansas 66045, United States.
Nano Lett. 2014 Sep 10;14(9):5308-14. doi: 10.1021/nl5027452. Epub 2014 Aug 11.
Single-walled carbon nanotubes (SWCNTs) have highly desirable attributes for solution-processable thin-film photovoltaics (TFPVs), such as broadband absorption, high carrier mobility, and environmental stability. However, previous TFPVs incorporating photoactive SWCNTs have utilized architectures that have limited current, voltage, and ultimately power conversion efficiency (PCE). Here, we report a solar cell geometry that maximizes photocurrent using polychiral SWCNTs while retaining high photovoltage, leading to record-high efficiency SWCNT-fullerene solar cells with average NREL certified and champion PCEs of 2.5% and 3.1%, respectively. Moreover, these cells show significant absorption in the near-infrared portion of the solar spectrum that is currently inaccessible by many leading TFPV technologies.
单壁碳纳米管 (SWCNTs) 在溶液处理的薄膜光伏 (TFPV) 中具有理想的属性，例如宽带吸收、高载流子迁移率和环境稳定性。然而，以前包含光活性 SWCNTs 的 TFPVs 采用的结构限制了电流、电压，最终限制了功率转换效率 (PCE)。在这里，我们报告了一种太阳能电池几何结构，该结构使用多手性 SWCNTs 最大限度地提高光电流，同时保持高光电压，从而实现了创纪录的高效率 SWCNT-富勒烯太阳能电池，平均 NREL 认证和冠军 PCE 分别为 2.5%和 3.1%。此外，这些电池在太阳能光谱的近红外部分显示出显著的吸收，而目前许多领先的 TFPV 技术无法达到这一部分。
