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Journal of Materials Science
Erschienen in: Journal of Materials Science 7/2020

28.10.2019 | Energy materials

Improving the power conversion efficiency of perovskite solar cells by adding carbon quantum dots

verfasst von: Yan Wen, Guang Zhu, Yi Shao

Erschienen in: Journal of Materials Science | Ausgabe 7/2020

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Abstract

High-quality perovskite films are the key factor in manufacturing high-performance devices. In this work, we for the first time use carbon quantum dots (CQDs) as additive in the methylammonium iodide solution for high-quality CH3NH3PbI3 (MAPbI3) films. Appropriate concentration of CQDs (0.04 mg ml−1) can passivate the crystal defects, improve the crystallinity, increase the grain size and reduce the grain boundary of MAPbI3 film. Various characterization results show that CQDs additive can reduce trap-state density, decrease carrier recombination and improve photoelectric performance. Compared with the pristine device, the average power conversion efficiency (PCE) of CQD-modified MAPbI3 device was increased from 15.8 ± 0.37% to 18.81 ± 0.45%, and the maximum PCE of champion device was increased from 16.21 to 19.17%. In this study, we propose a simple method for the preparation of stable and efficient inverted planar structure perovskite solar cells using CQD additives in a two-step spin-coated deposition method.
Vorheriger Artikel Preparation and characterization of hematite nanoparticles-decorated zinc oxide particles (ZnO/Fe2O3) as photoelectrodes for solar cell applications
Nächster Artikel Two-dimensional layered materials InSe nanoflakes/carbon nanotubes composite for flexible all-solid-state supercapacitors

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Metadaten
Titel
Improving the power conversion efficiency of perovskite solar cells by adding carbon quantum dots
verfasst von
Yan Wen
Guang Zhu
Yi Shao
Publikationsdatum
28.10.2019
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 7/2020
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-019-04145-9

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