Menezes Shalini, Samantilleke Anura
InterPhases Solar, Moorpark, USA.
Universidade de Minho, Braga, Portugal.
Sci Rep. 2018 Jul 27;8(1):11350. doi: 10.1038/s41598-018-29457-9.
Semiconductor pn junctions, integrated in optoelectronic devices require high quality crystals, made by expensive, technically difficult processes. Bulk heterojunction (BHJ) structures offer practical alternatives to circumvent the cost, flexibility and scale-up challenges of crystalline planar pn junctions. Fabrication methods for the current organic or inorganic BHJ structures invariably create interface mismatch and low doping issues. To overcome such issues, we devised an innovative approach, founded on novel inorganic material system that ensued from single-step electrodeposited copper-indium-selenide compounds. Surface analytical microscopies and spectroscopies reveal unusual phenomena, electro-optical properties and quantum effects. They support the formation of highly-ordered, sharp, abrupt 3-dimensional nanoscale pn BHJs that facilitate efficient charge carrier separation and transport, and essentially perform the same functions as crystalline planar pn junctions. This approach offers a low-cost processing platform to create nanocrystalline films, with the attributes necessary for efficient BHJ operation. It allows roll-to-roll processing of flexible devices in simple thin-film form factor.
集成在光电器件中的半导体 pn 结需要通过昂贵且技术难度大的工艺制造的高质量晶体。体异质结（BHJ）结构提供了切实可行的替代方案，以规避晶体平面 pn 结在成本、灵活性和扩大规模方面的挑战。当前有机或无机 BHJ 结构的制造方法总是会产生界面失配和低掺杂问题。为克服这些问题，我们设计了一种创新方法，该方法基于由单步电沉积铜铟硒化合物产生的新型无机材料体系。表面分析显微镜和光谱学揭示了异常现象、电光特性和量子效应。它们支持形成高度有序、尖锐、陡峭的三维纳米级 pn BHJ，这有助于实现高效的电荷载流子分离和传输，并且基本上执行与晶体平面 pn 结相同的功能。这种方法提供了一个低成本的加工平台来制造纳米晶体薄膜，具有高效 BHJ 运行所需的特性。它允许以简单的薄膜外形对柔性器件进行卷对卷加工。
