Surface and Interface Effects on Photovoltaic and Light-Emitting Characteristics of Colloidal Nanocrystal Heterostructures

表面和界面对胶体纳米晶异质结构光伏和发光特性的影响

• 批准号: 1808163
• 负责人: Moonsub Shim
• 金额: $ 39万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-07-01 至 2022-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1808163&HistoricalAwards=false
• 关键词: Surface; Interface; Effects; Photovoltaic; Light

Nontechnical Description: Semiconductors have enabled numerous technologies including computers, solar cells and LED lighting. The emerging ability to make semiconductor materials sufficiently small such that varying their size and shape drastically alters their optical and electrical properties is paving new paths to improving device efficiencies and, more importantly, imparting them with new capabilities. This project examines and improves on such semiconductors that can be synthesized and processed by relatively simple means, using chemical solutions. These materials can enable new or multiple functions in devices, for example, allowing a pixel in a display screen to not only emit but also sense light. Such a capability may in turn simplify the design and manufacturing of electronics such as smart phones and tablets, to imbue them with multiple new functionalities while reducing their size, weight, and energy consumption. Multi-faceted challenges to be tackled here provide ample educational and training opportunities for the students involved, helping them be better prepared to become leaders in interdisciplinary science and engineering fields. The PI is committed to building on the research results of this project to enhance teaching and promote benefits of emerging science and technologies to the general public.Technical Description: Colloidal quantum dots and, in particular, their heterostructures that can be processed through simple solution means are generating new opportunities through simplified fabrication processes, improved device performance and new functional capabilities. Central to incorporating these materials into electronic/optoelectronic devices is the understanding of how their surfaces and interfaces affect placement of charge carriers in and out of these materials. In turn, exploiting different surfaces/interfaces to control these fundamental processes and therefore improve device characteristics is essential in paving the path to the next generation of devices incorporating emerging nanoscale materials. This project examines critical surface and interfacial factors that impact photovoltaic and electroluminescence characteristics of devices consisting of colloidal quantum dots and in particular, their anisotropic heterostructures. Varying composition and shape provides a deeper understanding of the interplay between surface/interface effects, the underlying band structure, and shape/anisotropy. The knowledge gained should be broadly applicable to designing new materials with appropriate surfaces and interfaces for radically improved device performance and capabilities. The research endeavors of this project are synergistic with education and outreach efforts. Research findings inspire teaching and mentoring activities, impacting education while also promoting interest in fundamental science among the general public.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术描述：半导体使包括计算机，太阳能电池和LED照明在内的许多技术。使半导体材料变得足够小的新兴能力使它们的大小和形状变化极大地改变了它们的光学和电气性能，这为提高设备效率的新途径铺平了新的道路，更重要的是，将它们赋予了新功能。该项目研究并改进了可以使用化学解决方案通过相对简单的手段合成和处理的这种半导体。例如，这些材料可以在设备中启用新的或多个功能，例如，在显示屏上允许像素不仅发出，而且可以发出光线。这样的能力又可以简化智能手机和平板电脑等电子产品的设计和制造，从而使它们具有多种新功能，同时减少它们的尺寸，重量和能耗。这里要解决的多方面挑战为参与的学生提供了充足的教育和培训机会，帮助他们更好地准备成为跨学科科学和工程领域的领导者。 PI致力于建立该项目的研究结果，以增强教学并促进新兴的科学和技术对公众的利益。技术描述：胶体量子点，尤其是可以通过简单解决方案处理的胶体量子点，尤其是它们的异质结构，这意味着通过简化的制造工艺来生成新的机会，改善了设备的性能和新功能功能功能。将这些材料纳入电子/光电设备中的核心是了解它们的表面和接口如何影响电荷载体进入和输入这些材料的位置。反过来，利用不同的表面/界面来控制这些基本过程，因此改善设备特性对于铺平了结合新兴纳米级材料的下一代设备的道路至关重要。该项目研究了影响由胶体量子点，尤其是其各向异性异质结构组成的设备的光伏和电致发光特性的关键表面和界面因子。不同的组成和形状可以更深入地了解表面/界面效应，基础带结构和形状/各向异性之间的相互作用。获得的知识应广泛地适用于设计具有适当表面和接口的新材料，以从根本上提高设备性能和功能。该项目的研究努力与教育和外展工作是协同的。研究结果激发了教学和指导活动，影响教育，同时也促进了公众对基础科学的兴趣。该奖项反映了NSF的法定使命，并被认为是值得通过基金会的知识绩效和更广泛影响的审查标准来通过评估来获得支持的。

项目成果

Design Principles of Colloidal Nanorod Heterostructures

• DOI: 10.1021/acs.chemrev.2c00410
• 发表时间: 2022-10-17
• 期刊: CHEMICAL REVIEWS
• 影响因子: 62.1
• 作者: Drake，Gryphon A.;Keating，Logan P.;Shim，Moonsub
• 通讯作者: Shim，Moonsub

Extending the Spectral Range of Double-Heterojunction Nanorods by Cation Exchange-Induced Alloying

• DOI: 10.1021/acs.chemmater.9b02615
• 发表时间: 2019-10
• 期刊: Chemistry of Materials
• 影响因子: 8.6
• 作者: Joseph C Flanagan;Logan P. Keating;Muttanagoud N. Kalasad;M. Shim

Towards the commercialization of colloidal quantum dot solar cells: perspectives on device structures and manufacturing

• DOI: 10.1039/c9ee03348c
• 发表时间: 2020-02-01
• 期刊: ENERGY & ENVIRONMENTAL SCIENCE
• 影响因子: 32.5
• 作者: Lee, Hyunho;Song, Hyung-Jun;Lee, Changhee
• 通讯作者: Lee, Changhee