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Understanding interfacial energy structures in organic solar cells using photoelectron spectroscopy: A review

期刊

JOURNAL OF APPLIED PHYSICS
卷 132, 期 5, 页码 -

出版社

AIP Publishing
DOI: 10.1063/5.0091960

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资金

  1. National Research Foundation of Korea [NRF-2019K1A3A7A09101449, NRF-2020R1F1A1075539, NRF-2021R1C1C2011757]
  2. Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN-2016-04793]
  3. National Research Foundation of Korea [2019K1A3A7A09101449] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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Organic solar cells (OSCs) are gaining attention as a promising clean energy technology due to their low cost and potential for large-scale manufacturing. However, there is still a lack of understanding regarding charge carrier transport and the impact of ionic moieties in OSCs. Interfacial engineering is an effective approach to improve the performance of organic photovoltaic devices.
Organic solar cells (OSCs) have received considerable attention as a promising clean energy-generating technology because of their low cost and great potential for large-scale commercial manufacturing. With significant advances in new charge-transport material design, interfacial engineering, and their operating conditions, power conversion efficiencies of OSCs have continued to increase. However, a fundamental understanding of charge carrier transport and especially how ionic moieties affect carrier transport is still lacking in OSCs. In this regard, photoelectron spectroscopy has provided valuable information about interfacial electronic structures. The interfacial electronic structure of OSC interlayers greatly impacts charge extraction and recombination, controls energy level alignment, guides active layer morphology, improves material's compatibility, and plays a critical role in the resulting power conversion efficiency of OSCs. Interfacial engineering incorporating inorganic, organic, and hybrid materials can effectively enhance the performance of organic photovoltaic devices by reducing energy barriers for charge transport and injection while improving compatibility between metal oxides and donor-acceptor based active layers or transparent conducting electrodes. This article provides a review of recent developments in interfacial engineering underlying organic photovoltaic devices of donor-acceptor interfaces. Published under an exclusive license by AIP Publishing.

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