Development of white light emitting diodes using designer nanocrystalline emitters

在我们之前的Engage合作中，Kambhampati集团提供了激光专业知识和资源，使Two-Photon Research能够在其主要的光电子领域评估基于激光的微加工新方法。光电子学的共同点导致了这个CRD提案，该提案基于新领域的共同和互补的兴趣和专业知识。* 一个目标是开发用于发光的新的有源元件。白色光的产生在能源危机的背景下尤其重要。白色光可以通过许多装置产生，例如发光二极管（LED）。传统的LED方法由于封装而成本低。相比之下，诸如有机（OLED）和量子点（QLED）基发射器的新材料凭借其可加工性实现了成本降低和新功能。目前的研究主要集中在量子点或量子阱（NC）系统，发射窄带光。单色性实际上是标准NC的设计目标。进一步的改进将是如果可以制造可从一个NC可控地发射白色光的类似可处理的NC发射器。我们先前的基础科学工作已经表明，我们可以通过表面的化学控制来理解单个NC的白色光发射。在这里，我们将应用这些想法与双光子研究合作，从我们的化学控制的表面发射纳米晶体开发WLED。* 在本提案中，我们将测试我们合成的各种NC系统对WLED技术的适用性。我们将进行合成，表征，光谱和建模，以创建一套控制的白色光发射的NC。我们将与Two-Photon Research合作，使用我们的NC制造LED，从而为白色光的产生开辟新的道路。除了WLED技术，这些想法将对光学传感和潜在的不可预见领域产生影响，为双光子研究提供直接利益。

In our prior Engage collaboration, the Kambhampati group provided laser expertise and resources to enable Two-Photon Research to evaluate new methods of laser based micromachining in their primary space of optoelectronics. This common ground in optoelectronics led to this CRD proposal, based upon shared and complementary interests and expertise in new areas. ****One aims to develop new active elements for light emission. White light generation is especially important in the context of the energy crisis. White light may be generated by many means, e.g. the light emitting diode (LED). Traditional LED methods are cost ineffective due to packaging. In contrast, new materials such as organic (OLED) and quantum dot (QLED) based emitters enable cost reductions and new functionality by virtue of their processability. Current research has focused upon QD or nanocrystal (NC) systems which emit narrow bandwith light. Monochromaticity is actually a design goal in standard NC. A further improvement would be if one could make a similarly processable NC emitter that could controllably emit white light from one NC. Our prior basic science work has shown that we can understand white light emission from a single NC by chemical control of the surface. Here, we will apply these ideas in collaboration with Two-Photon Research to develop WLED from our chemically controlled surface emissive nanocrystals. ****In this proposal we will test various NC systems that we synthesize for their suitability for WLED technology. We will perform synthesis, characterization, spectroscopy, and modeling to create a suite of controlled NC for white light emission. We will work with Two-Photon Research to fabricate LED using our NC thereby creating a roadmap for a new path for white light generation. In addition to WLED technology, these ideas will have implication on optical sensing and potentially unforeseen areas, offering direct benefit to Two-Photon Research.**********