Development of white light emitting diodes using designer nanocrystalline emitters

在我们之前的合作中，Kambhampati小组提供了激光专业知识和资源，使双光子研究公司能够在其主要的光电子学领域评估基于激光的微加工的新方法。这种在光电子学方面的共同点导致了这项基于新领域共同和互补的兴趣和专业知识的CRD提议。*一个目标是开发用于发光的新的活性元素。在能源危机的背景下，白光发电尤为重要。白光可以通过许多方式产生，例如发光二极管(LED)。由于封装的原因，传统的LED方法成本效益不高。相比之下，基于有机(OLED)和量子点(QLED)的发射体等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发射窄带光的量子点或纳米晶体(NC)系统。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人们可以制造类似的可加工的NC发射器，该NC发射器可以从一个NC可控地发射白光。我们之前的基础科学工作表明，我们可以通过对表面进行化学控制来理解单个NC发出的白光。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系统是否适合WLED技术。我们将进行合成、表征、光谱和建模，以创建一套用于白光发射的受控NC。我们将与双光子研究公司合作，使用我们的NC制造LED，从而为白光产生的新途径创造一个路线图。除了WLED技术，这些想法将对光学传感和潜在的不可预见的领域产生影响，为双光子研究提供直接好处。

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.**********