Department of Materials Science and Engineering, University of Maryland , College Park, Maryland 20742, United States.
Nano Lett. 2014 Feb 12;14(2):765-73. doi: 10.1021/nl404101p. Epub 2014 Jan 13.
Solar cell substrates require high optical transparency but also prefer high optical haze to increase the light scattering and consequently the absorption in the active materials. Unfortunately, there is a trade-off between these optical properties, which is exemplified by common transparent paper substrates exhibiting a transparency of about 90% yet a low optical haze (<20%). In this work, we introduce a novel transparent paper made of wood fibers that displays both ultrahigh optical transparency (∼ 96%) and ultrahigh haze (∼ 60%), thus delivering an optimal substrate design for solar cell devices. Compared to previously demonstrated nanopaper composed of wood-based cellulose nanofibers, our novel transparent paper has better dual performance in transmittance and haze but also is fabricated at a much lower cost. This high-performance, low-cost transparent paper is a potentially revolutionary material that may influence a new generation of environmentally friendly printed electronics.
太阳能电池基片需要高透光率，但也偏爱高雾度，以增加光散射，从而增加活性材料的吸收。不幸的是，这些光学性质之间存在权衡，这在常见的透明纸基片中得到了体现，透明纸的透光率约为 90%，而光学雾度较低（<20%）。在这项工作中，我们引入了一种由木纤维制成的新型透明纸，它具有超高的透光率（约 96%）和超高的雾度（约 60%），从而为太阳能电池器件提供了最佳的基片设计。与之前展示的由基于木材的纤维素纳米纤维组成的纳米纸相比，我们的新型透明纸在透光率和雾度方面具有更好的双重性能，而且制造成本也低得多。这种高性能、低成本的透明纸是一种潜在的革命性材料，可能会影响新一代环保型印刷电子产品。
