Effects of Self-Hybridized Exciton-Polaritons on TMDC Photovoltaics

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-02-06 DOI:10.1021/acs.nanolett.5c00399

Adam D. Alfieri, Tobia Ruth, Cheryl Lim, Jason Lynch, Deep Jariwala

引用次数: 0

Abstract

Hybrid light-matter states called exciton-polaritons have been explored to improve excitonic photovoltaic (PV) and photodiode efficiency, but the use of closed cavity structures results in efficiency gains over a narrow band, with losses in the short circuit current density under solar illumination. In WX₂ (X = S, Se), the simultaneous large optical constants and strong exciton resonance can result in self-hybridized exciton-polaritons (SHEPs) emerging from the strong coupling of excitons and optical cavity modes formed by WX₂. We perform thickness dependent device characterization of WS₂ and WSe₂ PVs to show that self-hybridized strong coupling enhances device efficiency on resonance while still enabling broadband absorption, resulting in improved short circuit current density under solar illumination. Ultimately, we leverage strong coupling to achieve external quantum efficiencies as high as 70% and record power conversion efficiencies approaching 7%. This result indicates the utility of SHEPs for light-energy harvesting applications.

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.