Collaborative Research: Interfacial Engineering for Stabilizing Hybrid Perovskites and Devices

合作研究：稳定混合钙钛矿和器件的界面工程

• 批准号: 2131610
• 负责人: Hanwei Gao
• 金额: $ 34.63万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2131610&HistoricalAwards=false
• 关键词: Collaborative; Research; Interfacial; Engineering; Stabilizing

AbstractNon-Technical SummaryHighly efficient and low-cost light emitting diodes (LEDs) are critical for the future energy landscape in the United States. They are widely used in displays and lighting. Current technologies use high temperature and high vacuum for materials processing and device fabrication, which are energy- and infrastructure-demanding. In this project, LED devices based on a new type of semiconductors—the so-called organic-inorganic hybrid perovskites—will be studied. These materials exhibit excellent optical and optoelectronic properties required for LED applications. In addition, they can be processed at low temperature under mild conditions, making the device fabrication and integration much easier. This research will enable future LED devices that are scalable and cost-effective. This project will also provide interdisciplinary training to undergraduate and graduate students, providing them with critical-thinking and problem-solving skills needed for future careers in areas of semiconductor technology.Technical SummaryOrganic-inorganic hybrid perovskites have shown tremendous potential for low-cost, energy-efficient optoelectronics (e.g. LEDs and solar cells). Development of viable devices based on the perovskites, however, has been inhibited by materials and device instability. Among the factors that are responsible for the performance loss, ion migration appears to be intrinsic to this new class of semiconductors and remains challenging to be circumvented. This project aims to identify new ways to stabilize perovskite-LEDs by interfacial engineering. Three questions that are critical to the success of the proposed research will be answered: (1) which interface in perovskite devices is more vulnerable to ion migration? (2) could the ion migration be suppressed by introducing “extrinsic” interlayers at the grain boundary and interface? (3) what are the suitable techniques for implementing such interlayers? Leveraging comprehensive expertise on materials chemistry and device physics, the collaborative team will unravel fundamental roles of the interfaces in materials degradation and provide a practical strategy for stabilizing perovskite devices. The ultimate goal of the project is to break the current ceiling of device stability and demonstrate perovskite-LEDs with 1000-hour operation lifetime. On a broader scope, the approach of interfacial engineering established in this project will also be applicable to other perovskite devices such as solar cells and photodetectors, which share many common features with perovskite-LEDs from materials selection to device architecture.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.

Abstractnon-technical摘要高效和低成本发光二极管（LED）对于美国未来的能源景观至关重要。它们被广泛用于显示和照明。当前的技术使用高温和高真空来进行材料加工和设备制造，这是能源和基础设施的要求。在这个项目中，将研究基于新型的半导体（所谓的有机无机杂种钙壶）的LED设备。这些材料具有LED应用所需的出色光学和光电特性。此外，它们可以在轻度条件下在低温下进行处理，从而使设备的制造和集成更加容易。这项研究将使未来的LED设备可扩展且具有成本效益。该项目还将为本科和研究生提供跨学科的培训，为他们提供对半导体技术领域的未来职业所需的批判性思维和解决问题的技能。技术摘要汇总有机 - 无机杂种钙晶显示了低成本，能源效率，效率高效的光电电机和SOL的巨大潜力（E.G. leds and Solar和Solar）。但是，基于钙钛矿的可行设备的开发已被材料和装置不稳定性所抑制。在导致性能损失的因素中，离子迁移似乎是这类新型半导体的内在源头，并且仍然受到挑战。该项目旨在通过界面工程确定稳定钙钛矿领导的新方法。将回答对拟议研究成功至关重要的三个问题：（1）钙钛矿设备中哪些接口更容易受到离子迁移的影响？ （2）可以通过在晶界和界面引入“外部”层中层来抑制离子迁移？ （3）实施此类中间器的合适技术是什么？利用材料化学和设备物理的全面专业知识，协作团队将在材料退化中揭示界面的基本作用，并为稳定钙钛矿设备提供实用的策略。该项目的最终目标是打破设备稳定性的当前上限，并以1000小时的运行寿命展示钙钛矿领导。在更广泛的范围上，该项目中建立的界面工程的方法也适用于其他钙岩设备，例如太阳能电池和太阳能电池和光电探测器，这些设备与perovskite LED共享许多共同特征，从材料选择到设备架构。该奖项通过评估了NSF的法定任务，反映了NSF的法定任务，并通过评估了Intellitia crigia cripitia crotial and Funditia and Interviatial and Intervisial and Interviatial and Inthern andit andit andit and Intive and Intervial and Intervial and Internitial and Intervial and Internitial and Internitial的支持。