Issue 41, 2016
From the journal:

RSC Advances

Performance enhancement of perovskite solar cells with a modified TiO2 electron transport layer using Zn-based additives†

Minghang Lv,a   Wei Lv,a   Xiang Fang,a   Peng Sun,a   Bencai Lin,ab   Shuai Zhang,ab   Xueqing Xu,d   Jianning Ding*abc  and  Ningyi Yuan*ab  

* Corresponding authors

a School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center for Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu, China
E-mail: nyyuan@cczu.edu.cn, dingjn@cczu.edu.cn

b Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, Changzhou University, Changzhou, Jiangsu, China

c Micro/Nano Science and Technology Center, Jiangsu University, Zhenjiang, China

d Guangzhou Institute of Energy Conversion, Renewable Energy and Gas Hydrate Key Laboratory of Chinese Academy of Sciences, Guangzhou 510640, China

Abstract

Perovskite solar cells (PVSCs) have recently emerged as a very attractive option in film photovoltaics. Both solvent-engineering techniques and electron transport layer (ETL) properties are necessary for high-performance PVSCs. Herein, we report a one-step spin-coating approach for the preparation of uniform and dense perovskite layers, using a mixed solvent of dimethylacetamide (DMAC) and N-methyl-2-pyrrolidone (NMP) followed by exposure to toluene to induce crystallization. We also developed a simple and quantitative method to improve the traditional compact TiO2 ETL properties and device performance based on Zn precursor doping. The effect of Zn-doped TiO2 was investigated using atomic force microscopy, ultraviolet-visible spectra, photoluminescence, and open-circuit photovoltage decays. The results indicate that Zn-doped TiO2 provides a better interface between the ETL and perovskite layer than non-doped TiO2. Light Zn doping (2 vol%) was found to be the most effective additive, and the average power conversion efficiency improved from 13.61% to 15.25%.

Graphical abstract: Performance enhancement of perovskite solar cells with a modified TiO2 electron transport layer using Zn-based additives

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Article information

DOI
https://doi.org/10.1039/C6RA01149G
Article type
Paper
Submitted
14 Jan 2016
Accepted
29 Mar 2016
First published
31 Mar 2016

RSC Adv., 2016,6, 35044-35050

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Performance enhancement of perovskite solar cells with a modified TiO2 electron transport layer using Zn-based additives

M. Lv, W. Lv, X. Fang, P. Sun, B. Lin, S. Zhang, X. Xu, J. Ding and N. Yuan, RSC Adv., 2016, 6, 35044 DOI: 10.1039/C6RA01149G

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