Facilitating the formation of SnO2 film via hydroxyl groups for efficient perovskite solar cells

Facilitating the formation of SnO2 film via hydroxyl groups for efficient perovskite solar cells

The surface roughness and optoelectronic property of SnO2 film are improved by introducing hydroxyl groups on FTO surface, resulting in the champion power conversion efficiency of the corresponding perovskite solar cells is improved from 18.28% to 19.51%. [Display omitted] •The more hydroxyl groups...

Full description

Saved in:
Bibliographic Details
Published in:Applied surface science Vol. 552; p. 149459
Main Authors: Bai, Yuchi, Xing, Dongliang, Luo, Huiming, Jiang, Qing-Song, Yuan, Ligang, Ge, Xuehao, Yang, Xiao, Zhang, Yulin, Xie, Fangyan, Yan, Keyou
Format: Journal Article
Language:English
Published: Elsevier B.V 30-06-2021
Subjects:
Hydroxyl groups
Perovskite
SnCl2·2H2O
SnO2 film
Solar cells
Solar cells
SnCl2·2H2O
Perovskite
SnO2 film
Hydroxyl groups
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The surface roughness and optoelectronic property of SnO2 film are improved by introducing hydroxyl groups on FTO surface, resulting in the champion power conversion efficiency of the corresponding perovskite solar cells is improved from 18.28% to 19.51%. [Display omitted] •The more hydroxyl groups are introduced on the surface of FTO glass.•The interface between FTO glass and SnO2 film is strengthened.•The SnO2 film with low defect density shows high electrical conductivity.•The SnO2 film shows a suitable energy level alignment with perovskite layer.•The champion device exhibits an elevated efficiency of 19.51% and better stability. Interfacial engineering has been considered as an effective technique to improve the photovoltaic performance of perovskite solar cells (PSCs). Here, the interface between tin oxide (SnO2) film and fluorine-doped tin oxide (FTO) glass is dealt with a piranha solution, resulting in more hydroxyl groups on the surface of FTO glass. SnO2 film is fabricated by spin-coating SnCl2·2H2O precursor. Our results demonstrate that SnO2 film exhibits high electricalconductivity, low electron trap density, and suitable energy level. Furthermore, SnO2 film with low roughness is beneficial to fabricate high-quality perovskite film. Then, the PSCs with the structure of FTO/SnO2/Cs0.05(MA0.17FA0.83)0.95Pb(I0.83Br0.17)3/Spiro-OMeTAD/Au are also fabricated. The highest power conversion efficiency (PCE) of PSCs increases from 18.28% to 19.51%, and the average PCE enhances from 17.82% to 18.89%. The optimized PSC shows the long-term stability and remains 97% of its initial PCE after 4000 h on-shelf lifetime test.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2021.149459