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Life cycle analysis of quantum dot semiconductor materials.

机译：量子点半导体材料的生命周期分析。

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摘要

This study seeks to advance our understanding of environmental impacts of nanotechnology through the application of life cycle assessment methods. Unique contributions of the thesis include (1) identification of environmentally significant aspects of nanomanufacturing, (2) performance of a cradle-to-gate life cycle inventory of materials and energy needs for CdSe quantum dots, (3) life cycle analysis of quantum dot photovoltaic (QDPV) modules and comparative assessment of their environmental impacts with that of other types of energy sources, (4) estimation of trends of quantum dot consumption and associated environmental impacts through adoption of quantum dot light emitting diodes (QDLEDs) in markets in the United States during the next decade (2009-2018).;Results indicate that the environmental impacts of nanomanufacturing methods may be more profound than that of conventional manufacturing because of their unique attributes such as low material efficiencies, the need for specialized environments, and repetitive processing steps. This is demonstrated for quantum dots, the manufacture of which is both energy and material intensive. Quantum dots also have a higher waste-to-product ratio 972 compared to bulk chemicals, fine chemicals and pharmaceuticals. However, the ultimate impact of quantum dots depends on the specific products into which they are incorporated, for instance the environmental impacts of quantum dot photovoltaic (QDPV) modules are less than other types of PV modules, except heavy metal emissions. QDPV modules have a better environmental performance than carbon-based energy sources but they have longer energy pay back times (EPBT) than wind and hydropower. Adoption of QDLEDs in markets may result in up to 160 kilograms of quantum dot consumption in the next decade in the United States, while resulting in far greater reduction of mercury consumption due to replacement of mercury-containing light sources. Energy savings due to efficiency improvements may be as much as 800 gigawatthours.
机译：这项研究旨在通过应用生命周期评估方法来加深我们对纳米技术对环境影响的理解。论文的独特贡献包括：（1）纳米制造对环境的重要方面的识别；（2）从摇篮到大门的生命周期库存材料的性能以及CdSe量子点的能量需求；（3）量子点的生命周期分析光伏（QDPV）模块，并与其他类型的能源进行比较，以评估其对环境的影响；（4）通过在市场中采用量子点发光二极管（QDLED）来估算量子点消耗的趋势以及相关的环境影响。结果表明，在未来十年（2009-2018年），美国的纳米制造方法对环境的影响可能会比常规制造方法更为深刻，因为它们具有诸如材料效率低，需要特殊环境以及重复性强等独特属性。处理步骤。量子点证明了这一点，量子点的制造既消耗能量，又消耗材料。与散装化学品，精细化学品和药品相比，量子点还具有更高的废品率972。但是，量子点的最终影响取决于结合它们的特定产品，例如，量子点光伏（QDPV）模块对环境的影响小于其他类型的PV模块，除了重金属的排放量。 QDPV模块具有比碳基能源更好的环境性能，但与风能和水力发电相比，它们的能源回收时间（EPBT）更长。在市场上采用QDLED可能会导致美国在未来十年内消耗多达160千克量子点，同时由于更换含汞光源而导致汞消耗的大幅减少。通过提高效率而节省的能源可能多达800吉瓦时。

著录项

  • 作者

    Sengul, Hatice.;

  • 作者单位

    University of Illinois at Chicago.;

  • 授予单位 University of Illinois at Chicago.;
  • 学科 Engineering Civil.;Engineering Environmental.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 255 p.
  • 总页数 255
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;环境污染及其防治;
  • 关键词

  • 入库时间 2022-08-17 11:38:24

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