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Bujalance C, Esteso V, Caliò L, Lavarda G, Torres T, Feist J, García-Vidal FJ, Bottari G, Míguez H. Ultrastrong Exciton-Photon Coupling in Broadband Solar Absorbers. J Phys Chem Lett 2021; 12:10706-10712. [PMID: 34709847 PMCID: PMC8573775 DOI: 10.1021/acs.jpclett.1c02898] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 10/18/2021] [Indexed: 06/13/2023]
Abstract
The recent development of organic polaritonic solar cells, in which sunlight absorbers and photon modes of a resonator are hybridized as a result of their strong coupling, has revealed the potential this interaction offers to control and enhance the performance of these devices. In this approach, the photovoltaic cell is built in such a way that it also behaves as an optical cavity supporting spectrally well-defined resonances, which match the broad absorption bands of the dyes employed. Herein we focus on the experimental and theoretical analysis of the specific spectral and angular optical absorption characteristics of a broadband light harvester, namely a subphthalocyanine, when operating in the ultrastrong coupling regime. We discuss the implications of having a broad distribution of oscillator strengths and demonstrate that rational design of the layered structure is needed to optimize both the spectral and the angular response of the sunlight harvester dye.
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Affiliation(s)
- Clara Bujalance
- Multifunctional
Optical Materials Group, Institute of Materials Science of Sevilla, Consejo Superior de Investigaciones Científicas−Universidad
de Sevilla (CSIC-US), Américo Vespucio 49, 41092 Sevilla, Spain
| | - Victoria Esteso
- Multifunctional
Optical Materials Group, Institute of Materials Science of Sevilla, Consejo Superior de Investigaciones Científicas−Universidad
de Sevilla (CSIC-US), Américo Vespucio 49, 41092 Sevilla, Spain
| | - Laura Caliò
- Multifunctional
Optical Materials Group, Institute of Materials Science of Sevilla, Consejo Superior de Investigaciones Científicas−Universidad
de Sevilla (CSIC-US), Américo Vespucio 49, 41092 Sevilla, Spain
| | - Giulia Lavarda
- Departamento
de Química Orgánica, Universidad
Autónoma de Madrid, 28049 Madrid, Spain
| | - Tomás Torres
- Departamento
de Química Orgánica, Universidad
Autónoma de Madrid, 28049 Madrid, Spain
- IMDEA
Nanociencia, Campus de Cantoblanco, 28049 Madrid, Spain
- Institute
for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Johannes Feist
- Departamento
de Física Teórica de la Materia Condensada and Condensed
Matter Physics Center (IFIMAC), Universidad
Autónoma de Madrid, 28049 Madrid, Spain
| | - Francisco José García-Vidal
- Departamento
de Física Teórica de la Materia Condensada and Condensed
Matter Physics Center (IFIMAC), Universidad
Autónoma de Madrid, 28049 Madrid, Spain
| | - Giovanni Bottari
- Departamento
de Química Orgánica, Universidad
Autónoma de Madrid, 28049 Madrid, Spain
- IMDEA
Nanociencia, Campus de Cantoblanco, 28049 Madrid, Spain
- Institute
for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Hernán Míguez
- Multifunctional
Optical Materials Group, Institute of Materials Science of Sevilla, Consejo Superior de Investigaciones Científicas−Universidad
de Sevilla (CSIC-US), Américo Vespucio 49, 41092 Sevilla, Spain
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Huang Y, Yang L, Liu C, Liu X, Liu J, Huang X, Zhu P, Cui T, Sun C, Bao Y. Lasing-Mode Switch of a Hexagonal ZnO Pyramid Driven by Pressure within a Diamond Anvil Cell. J Phys Chem Lett 2019; 10:610-616. [PMID: 30668125 DOI: 10.1021/acs.jpclett.8b03748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Nanolasers are expected to be integrated on chips as miniaturized coherent light sources, and their application is strongly dependent on their lasing behavior. In this work, the lasing behavior of a single hexagonal ZnO pyramid (HZOP) is tailored by tuning the electronic bandgap with pressure. The lasing of the HZOP nanolaser is dominated by a helical whispering-gallery-like mode, and the lasing threshold varies little with increasing pressure. All lasing peaks of HZOP are limited in a spectral prescreen window on the right shoulder of the fluorescence emission and gradually blue-shift accompanied by several abrupt hops with increasing pressure. This feature of a spectral prescreen window originates from the strong coupling between excitons, and the coupling is described by a dispersive complex refractive index. These results provide a new perspective to tune and switch the lasing mode of a nanolaser with precision by the pressure-induced bandgap broadening of a semiconductor.
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Affiliation(s)
- Yadong Huang
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Liu Yang
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Chang Liu
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Xinxia Liu
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Junsong Liu
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Xiaoping Huang
- School of Physics , University of Electronic Science and Technology of China , Chengdu 610054 , China
| | - Pinwen Zhu
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Tian Cui
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Cheng Sun
- Department of Mechanical Engineering , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
| | - Yongjun Bao
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
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