Light absorption enhancement by embedding submicron scattering TiO2 nanoparticles in perovskite solar cells

Jun Yin; Hui Qu; Jing Cao; Huilin Tai; Jing Li; Nanfeng Zheng

doi:10.1039/C6RA01894G

Light absorption enhancement by embedding submicron scattering TiO₂ nanoparticles in perovskite solar cells†

Jun Yin,^ab Hui Qu,^a Jing Cao,^b Huilin Tai,^c Jing Li*^ac and Nanfeng Zheng*^b

* Corresponding authors

^a Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen, China
E-mail: lijing@xmu.edu.cn

^b State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
E-mail: nfzheng@xmu.edu.cn

^c State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China

Abstract

Efficient light absorption is a key issue for hybrid perovskite solar cells (PSCs) to achieve better photovoltaic performances. Here, we introduce submicron scattering TiO₂ (s-TiO₂) nanoparticles into the mesoporous TiO₂ layer to improve the overall light harvesting efficiency in PSCs. Obviously enhanced current density and power conversion efficiency (PCE) were accomplished due to the improved light trapping in the active layer. Corresponding enhancement mechanisms were studied by the absorption spectra and finite-difference time-domain (FDTD) simulation results. Electrochemical impedance spectroscopy (EIS) measurements were further carried out to investigate the charge transportation process influenced by introducing s-TiO₂ into the mesostructured layer. With the optimized amount of embedded s-TiO₂, an average of over 5% PCE enhancement with an efficiency up to 16.72% was achieved compared with the regular mesostructured PSCs.

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Article information

DOI: https://doi.org/10.1039/C6RA01894G
Article type: Paper
Submitted: 21 Jan 2016
Accepted: 25 Feb 2016
First published: 26 Feb 2016

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RSC Adv., 2016,6, 24596-24602

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Light absorption enhancement by embedding submicron scattering TiO₂ nanoparticles in perovskite solar cells

J. Yin, H. Qu, J. Cao, H. Tai, J. Li and N. Zheng, RSC Adv., 2016, 6, 24596 DOI: 10.1039/C6RA01894G

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