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Enhance the absorption of organic-inorganic perovskite film by nano-surface engineering
Author(s): M. Wang; L. X. Ren; K. X. Jin
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Paper Abstract

Organic-inorganic perovskite is an emerging material possessing potential applications in solar cell, light-emitting diodes, and photodetectors due to its intrinsic features. High absorption coefficient, as an important parameter, is beneficial to the photo-electrical conversion efficiency and the relevant issues. Therefore, how to further improve the absorption is a meaningful topic. In this work, we turn to the nano-surface engineering to realize great absorption. Concretely, the self-assembled truncated spherical nanovoids are arranged on the surface of the perovskite. In comparison with the planar perovskite film, the absorption coefficient is increased by 18% on average within 300 nm ~ 800 nm wavelength region and a wide incident angle range. The improvement is originated from the special arrangement of effective dielectric constants which can be verified by multilayer effective media theory. This finding paves a way of improving the absorption of perovskite at the scales between the wavelength (perovskite-based gratings) and the quantum (perovskite with quantum dot doping). Moreover, the relevant research has been pointed out that the structured perovskite films have better pressure resistance.

Paper Details

Date Published: 24 January 2019
PDF: 6 pages
Proc. SPIE 10840, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics, 108400T (24 January 2019); doi: 10.1117/12.2516516
Show Author Affiliations
M. Wang, Northwestern Polytechnical Univ. (China)
L. X. Ren, Northwestern Polytechnical Univ. (China)
K. X. Jin, Northwestern Polytechnical Univ. (China)


Published in SPIE Proceedings Vol. 10840:
9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics
Mingbo Pu; Xiong Li; Bin Fan; Min Gu; Reinhart Poprawe; Xiangang Luo, Editor(s)

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