Issue 9, 2020
From the journal:

Nanoscale Advances

UV–O3 treated annealing-free cerium oxide as electron transport layers in flexible planar perovskite solar cells†

Aiying Pang,ab   Jinlong Li,ac   Xiao-Feng Wei,d   Zhi-Wu Ruan,ab   Ming Yangab  and  Zhong-Ning Chen ORCID logo *ab  

* Corresponding authors

a State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China

b College of Chemistry and Materials, Fujian Normal University, Fuzhou, Fujian 350007, China

c College of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China

d National Engineering Research Center of Chemical Fertilizer Catalyst, School of Chemical Engineering, Fuzhou University, Fujian, China

Abstract

Fabricating electron transport layers at low temperatures is challenging but highly desired in the field of flexible perovskite solar cells (f-PSCs). In this study, highly uniform cerium oxide (CeOx) films prepared by the UV–O3 treatment have been successfully applied as the electron transport layer (ETL) in methylammonium lead halide (CH3NH3PbI3) perovskite-based f-PSCs. Under AM 1.5 G sunlight with 100 mW cm−2, these cells exhibited an open-circuit voltage (Voc) of 0.98 V, a short-circuit current density (Jsc) of 19.42 mA cm−2, a fill factor (FF) of 0.72 and power conversion efficiency (PCE) of 14.63%. The PCE was much higher than that of the control planar CeOx ETL (PCE ∼ 9.08%) prepared at a low temperature (80 °C) without the UV–O3 treatment, and this was ascribed to the improved CeOx film, enhanced light absorption and suppressed charge recombination. The cells that bend at 15 mm of radius showed excellent stability with less than 10% reduction in PCE after 500 cycles of repeated bending at ambient temperature. The charge-transmission kinetic parameters and long-term stability of the CeOx-based f-PSCs were analyzed as well.

Graphical abstract: UV–O3 treated annealing-free cerium oxide as electron transport layers in flexible planar perovskite solar cells

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Article information

DOI
https://doi.org/10.1039/D0NA00367K
Article type
Paper
Submitted
06 May 2020
Accepted
14 Jul 2020
First published
23 Jul 2020
This article is Open Access
Creative Commons BY license

Nanoscale Adv., 2020,2, 4062-4069

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UV–O3 treated annealing-free cerium oxide as electron transport layers in flexible planar perovskite solar cells

A. Pang, J. Li, X. Wei, Z. Ruan, M. Yang and Z. Chen, Nanoscale Adv., 2020, 2, 4062 DOI: 10.1039/D0NA00367K

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