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Molecular materials as interfacial layers and additives in perovskite solar cells

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2020

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Vasilopoulou, Maria
Coutsolelos, Athanassios G.
Falaras, Polycarpos
Argitis, Panagiotis
Yusoff, Abd Rashid Bin Mohd
Nazeeruddin, Mohammad Khaja

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Chemical Society Reviews. Royal Society of Chemistry (RSC). 2020, 49(13), pp. 4496-4526. ISSN 0306-0012. eISSN 1460-4744. Available under: doi: 10.1039/c9cs00733d

Zusammenfassung

Solar cells based on organo-metal halide perovskites have gained unprecedented research interest over the last few years due to their low-cost solution processability, high power conversion efficiency, which has recently reached a certified value of 25.2%, and abundance of raw materials. Nevertheless, the best efficiencies remain below the Shockley–Queisser theoretical limit of 32.5% due to several losses arising from either defect traps present in the bulk of the perovskite absorber or at the device heterointerfaces. While bulk defects are detrimental for the device performance by mainly limiting the open circuit voltage, interfacial layers are also crucial. They dictate the charge transfer/transport from the perovskite layer to the collecting electrodes, hence influencing the device photocurrent, but also act as protective barriers against oxygen and moisture penetration. Molecular materials and additives are widely used to improve the bulk properties of perovskite absorbers through the formation of high-quality perovskite films with superior optoelectronic properties, and improved crystallinity, and also of electronically clean interfaces with minimum losses during charge transfer/transport. In this review, we analyze the predominant pathways that contribute to voltage and current losses due to poor interfaces and also due to non-radiative recombination losses arising from inferior perovskite morphology and its inherent polycrystalline and highly defective nature. We then discuss strategies for achieving interfacial organic and inorganic molecular materials for application as electron and hole transport layers in perovskite solar cells with ideal energy levels, high charge mobilities and improved thermal, photo, and structural stability. Moreover, the prerequisites for molecular additives to achieve dimensionality engineering, defect passivation, molecular cross-linking, interfacial energy alignment and electronic doping are thoroughly discussed. Finally, we examine prospects for future research directions and commercialization.

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ISO 690VASILOPOULOU, Maria, Azhar FAKHARUDDIN, Athanassios G. COUTSOLELOS, Polycarpos FALARAS, Panagiotis ARGITIS, Abd Rashid Bin Mohd YUSOFF, Mohammad Khaja NAZEERUDDIN, 2020. Molecular materials as interfacial layers and additives in perovskite solar cells. In: Chemical Society Reviews. Royal Society of Chemistry (RSC). 2020, 49(13), pp. 4496-4526. ISSN 0306-0012. eISSN 1460-4744. Available under: doi: 10.1039/c9cs00733d
BibTex
@article{Vasilopoulou2020-07-06Molec-50673,
  year={2020},
  doi={10.1039/c9cs00733d},
  title={Molecular materials as interfacial layers and additives in perovskite solar cells},
  number={13},
  volume={49},
  issn={0306-0012},
  journal={Chemical Society Reviews},
  pages={4496--4526},
  author={Vasilopoulou, Maria and Fakharuddin, Azhar and Coutsolelos, Athanassios G. and Falaras, Polycarpos and Argitis, Panagiotis and Yusoff, Abd Rashid Bin Mohd and Nazeeruddin, Mohammad Khaja}
}
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