Electrically Pumped, Spin Polarized Perovskite Laser Diodes

该项目将促进对实现基于新兴的一类称为金属卤化物钙钛矿的半导体的新型激光二极管所需的科学基础的理解。钙钛矿是从溶液中沉积的，这意味着它们几乎可以在任何衬底上制造，而传统的激光二极管很难甚至不可能生长。此外，目前激光二极管在绿色中的性能存在缺陷，通俗地称为“绿色间隙”。过氧化物酶可以在整个可见光谱区域有效地发光，保持解决“绿色间隙”的潜力。该研究将加强美国的技术领导地位，并为下一代科学，技术，工程和数学（STEM）毕业生（包括女性和代表性不足的群体）做好准备，以从事STEM职业。该项目将纳入推广活动，以便将这项研究传播给K-12学生。金属卤化物钙钛矿研究界面临的一个巨大挑战是展示非外延，电泵浦钙钛矿激光二极管。克服这一挑战不仅将促进对钙钛矿半导体独特材料特性的科学理解，而且还将提供具有连续波长可调谐性的新型激光二极管，并且能够集成在各种各样的衬底上，其中III-V族半导体生长是困难的，甚至是不可能的。然而，有几个主要的障碍，必须克服，以实现这一目标，如更深入地了解电泵浦下的增益特性，以及如何实现可观的水平，同时管理显着的发射猝灭过程的激光所需的电流注入。我们提出的研究旨在克服这些障碍，并展示一种电泵浦的自旋极化钙钛矿激光二极管。这个演示将伴随着对这些材料中的光增益特性和电荷载流子复合过程的深入理解。从这一改进的理解中，可以开发用于设备优化的定制策略。该项目将对卤化物钙钛矿光电应用中发展不成熟的方面产生重大影响，例如集成在芯片上的光通信。该项目由电气，通信和网络系统部门（ECCS）的电子，光子和磁性器件（EPMD）计划共同资助，激励竞争研究计划（EPSCoR）该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查进行评估，被认为值得支持的搜索.

This project will advance the understanding of the scientific foundation needed to realize a new type of laser diodes based on an emerging class of semiconductor called metal halide perovskites. Perovskites are deposited from solution, meaning that they can be fabricated on virtually any substrates, where traditional laser diodes are difficult or even not possible to grow. Furthermore, there is currently a deficiency in the performance of laser diodes in the green, known colloquially as the “green gap”. Perovskite can emit light efficiently throughout the visible spectral region, holding the potential to address the “green gap”. The research will strengthen technological leadership of the U.S. and prepare the next generation of science, technology, engineering, and math (STEM) graduates, including women and underrepresented groups, to follow a STEM career. This project will incorporate outreach activities for the purpose of disseminating this research to K-12 students.A grand challenge within the metal halide perovskite research community is to demonstrate a non-epitaxial, electrically pumped perovskite laser diode. Overcoming this challenge will not only facilitate scientific understandings of the unique material properties of perovskite semiconductors, but also deliver a new class of laser diodes with continuous wavelength tunability and the ability to be integrated on a broad range of substrates where III-V semiconductor growth is difficult or even not possible. However, there are several major obstacles that must be surmounted to achieve this goal, such as a deeper understanding of the gain characteristics under electrical pumping, and how to achieve appreciable levels of current injection required for lasing while managing significant emission-quenching processes. Our proposed research seeks to overcome these obstacles and demonstrate an electrically pumped, spin polarized perovskite laser diode. This demonstration will be accompanied by a deep understanding of the optical gain characteristics and charge carrier recombination processes in these materials. From this improved understanding, tailored strategies for device optimization can be developed. This project will have a great impact on less well-developed aspects of halide perovskite optoelectronic applications, such as optical communications integrated on-chip.This project is jointly funded by the Electronic, Photonic, and Magnetic Devices (EPMD) Program of the Electrical, Communications and Cyber Systems Division (ECCS) Division , and the Established Program to Stimulate Competitive Research (EPSCoR).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.