Stable ultrathin surfactant-free surface-engineered silicon nanocrystal solar cells deposited at room temperature
Stable ultrathin surfactant-free surface-engineered silicon nanocrystal solar cells deposited at room temperature
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DOI：
10.1002/ese3.165
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发表时间：
2017-08-01
影响因子：
3.8
通讯作者：
Matsubara, Koji
中科院分区：
文献类型：
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作者：
Svrcek, Vladimir;McDonald, Calum;Matsubara, Koji
我们提出了一种在室温下可扩展的技术，用于基于无表面活性剂的表面工程硅纳米晶体（SiNC）制造超薄膜。采用环保型脉冲 fsec 激光诱导 SiNC 表面工程和真空低角度喷射沉积来生产超薄膜。 SiNC 的表面工程通过在室温下实现薄（30 nm 厚）和异常光滑（均方粗糙度对应于 0.32 nm）的薄膜沉积，提高了 SiNC 的稳定性和分散性。 SiNC 薄膜的质量通过超快光致发光测量以及将此类薄膜应用于太阳能电池来证实。我们证明用这种方法生产的薄膜可以产生良好且稳定的器件。这里开发的方法与非常广泛的应用高度相关，这些应用需要形成具有可控厚度和光滑度的高质量量子点超薄膜。
We present a scalable technology at room temperature for the fabrication of ultrathin films based on surfactant-free surface-engineered silicon nanocrystals (SiNCs). Environmentally friendly pulsed fsec laser induced surface engineering of SiNCs and vacuum low-angle spray deposition is used to produce ultrathin films. Surface engineering of SiNCs improved stability and dispersibility of SiNCs by allowing thin (30 nm thickness) and exceptionally smooth (mean square roughness corresponds to 0.32 nm) film deposition at room temperature. The quality of the SiNC thin films is confirmed by ultrafast photoluminescence measurements and by applying such films for solar cells. We demonstrate that films produced with this approach yield good and stable devices. The methodology developed here is highly relevant for a very wide range of applications where the formation of high-quality ultrathin films of quantum dots with controllable thickness and smoothness is required.