QNEEX2D: Quantum Non-equilibrium excitons in two-dimensional semiconductors

Project funded by Fundação para a Ciência e a Tecnologia, I.P. (FCT) (Concurso de Projetos de Investigação de Caráter Exploratório (PeX) em Todos os Domínios Científicos), grant EXPL/FIS-MAC/0953/2021. Funded amount: EUR 49,946.40, as stated by the source. Runs 2022-01-10 to 2024-01-09. Keywords: Excitons, Non-equilibrium physics, Electroluminescence, Photocurrent generation, Exact sciences. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2026-07-23); national funding data, not CORDIS. Abstract given by the source: As miniaturization of optoelectronic devices progresses, quantum mechanical effects play an ever increasing role. This is particularly true for devices based on two-dimensional systems, such as semiconducting transition metal dichalcogenides (STMD). In this project, we will develop a quantum mechanical theory of electroluminescence and photocurrent generation in STMD devices, which takes into account the physics of excitons (electron-hole bound excitations) under non-equilibrium conditions. Some of the most pressing challenges faced by modern society require the processing and transmission of an ever increasing amount of information, the development of new types of sensors, and harvesting of solar energy. The solution to these problems will require the development of a new generation of optoelectronic devices. The field of condensed matter physics will play an essential role in this process. Understanding the physics of excitons - states that occur in semiconducting or insulating materials, when a valence electron is excited to the conduction band and forms an electron-hole bound pair - will be key to push forward new optoelectronic technology. While the study of excitons has a long history in condensed matter physics, recent scientific and technological advances, in nanoscale fabrication techniques and in the field of two-dimensional materials, have led to a resurgent interest in their study. This is mostly due to the isolation of monolayer STMDs, such as MoS2, MoSe2, WS2 and WSe2. These materials are direct band semiconductors with gaps in the visible range and strong light-matter interaction. These properties make STMDs ideally suited to optoelectronic applications. In fact, several STMD based optoelectronic devices have already been developed. These include photodetectors, light-emitting diodes (LED), solar cells, and single-photon quantum emitters. It turns out that the optical properties of STMDs in the visible range are controlled by strongly bound excitons [shortened; the full text is on the OpenAIRE page]

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Fundação para a Ciência e a Tecnologia, I.P. (FCT). Retrieved 2026-10-28. Licence: Creative Commons Attribution 4.0 (OpenAIRE Graph). Selected metadata, adapted presentation; the publisher's record is authoritative. No endorsement by the source is implied. Licence: Creative Commons Attribution 4.0 (CC BY 4.0).

AI-assisted summary: The project "QNEEX2D" focuses on developing a quantum mechanical theory of electroluminescence and photocurrent generation in two-dimensional semiconductors, funded by FCT with a grant of EUR 49,946.40 from January 2022 to January 2024. Suggested technology pillar: enabling. Generated by AI from the public source text; it may contain errors and the original source is authoritative.