气候变化领域集成服务门户(CCPortal): The impact of energy alignment and interfacial recombination on the internal and external open-circuit voltage of perovskite solar cells

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DOI	10.1039/c9ee02020a
	The impact of energy alignment and interfacial recombination on the internal and external open-circuit voltage of perovskite solar cells
	Stolterfoht M.; Caprioglio P.; Wolff C.M.; Márquez J.A.; Nordmann J.; Zhang S.; Rothhardt D.; Hörmann U.; Amir Y.; Redinger A.; Kegelmann L.; Zu F.; Albrecht S.; Koch N.; Kirchartz T.; Saliba M.; Unold T.; Neher D.
发表日期	2019
ISSN	1754-5692
起始页码	2778
结束页码	2788
卷号	12 期号:9
英文摘要	Charge transport layers (CTLs) are key components of diffusion controlled perovskite solar cells, however, they can induce additional non-radiative recombination pathways which limit the open circuit voltage (VOC) of the cell. In order to realize the full thermodynamic potential of the perovskite absorber, both the electron and hole transport layer (ETL/HTL) need to be as selective as possible. By measuring the photoluminescence yield of perovskite/CTL heterojunctions, we quantify the non-radiative interfacial recombination currents in pin- and nip-type cells including high efficiency devices (21.4%). Our study comprises a wide range of commonly used CTLs, including various hole-transporting polymers, spiro-OMeTAD, metal oxides and fullerenes. We find that all studied CTLs limit the VOC by inducing an additional non-radiative recombination current that is in most cases substantially larger than the loss in the neat perovskite and that the least-selective interface sets the upper limit for the VOC of the device. Importantly, the VOC equals the internal quasi-Fermi level splitting (QFLS) in the absorber layer only in high efficiency cells, while in poor performing devices, the VOC is substantially lower than the QFLS. Using ultraviolet photoelectron spectroscopy and differential charging capacitance experiments we show that this is due to an energy level mis-alignment at the p-interface. The findings are corroborated by rigorous device simulations which outline important considerations to maximize the VOC. This work highlights that the challenge to suppress non-radiative recombination losses in perovskite cells on their way to the radiative limit lies in proper energy level alignment and in suppression of defect recombination at the interfaces. © 2019 The Royal Society of Chemistry.
语种	英语
scopus关键词	Alignment; Capacitance; Fermi level; Heterojunctions; Hole mobility; Open circuit voltage; Perovskite; Timing circuits; Ultraviolet photoelectron spectroscopy; Charge transport layer; Energy level alignment; High efficiency devices; Hole-transporting polymer; Non-radiative recombinations; Quasi-Fermi level splitting; Recombination currents; Thermodynamic potentials; Perovskite solar cells; electron; energy efficiency; fuel cell; perovskite; solar power; thermodynamics
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162778
作者单位	Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, Potsdam-Golm, D-14476, Germany; Young Investigator Group Perovskite Tandem Solar Cells, Helmholtz-Zentrum Berlin für Materialien, Energie GmbH, Kekuléstraße 5, Berlin, 12489, Germany; Department of Structure and Dynamics of Energy Materials, Helmholtz-Zentrum-Berlin, Hahn-Meitner-Platz 1, Berlin, D-14109, Germany; Helmholtz-Zentrum Berlin für Materialien, Energie GmbH, Berlin, 12489, Germany; Institut für Physik, IRIS Adlershof, Humboldt-Universitat zu Berlin, Berlin, 12489, Germany; Institut für Energie- und Klimaforschung, Forschungszentrum Jülich GmbH, Jülich, 52425, Germany; Institute of Materials Science, Technical University of Darmstadt, Alarich-Weiss-Strasse 2, Darmstadt, D-64287, Germany; Faculty of Science, Technology and Communication, Université du LuxembourgL-1511, Luxembourg
推荐引用方式 GB/T 7714	Stolterfoht M.,Caprioglio P.,Wolff C.M.,et al. The impact of energy alignment and interfacial recombination on the internal and external open-circuit voltage of perovskite solar cells[J],2019,12(9).
APA	Stolterfoht M..,Caprioglio P..,Wolff C.M..,Márquez J.A..,Nordmann J..,...&Neher D..(2019).The impact of energy alignment and interfacial recombination on the internal and external open-circuit voltage of perovskite solar cells.Energy and Environmental Science,12(9).
MLA	Stolterfoht M.,et al."The impact of energy alignment and interfacial recombination on the internal and external open-circuit voltage of perovskite solar cells".Energy and Environmental Science 12.9(2019).