In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 7 ( 2022), p. 3642-3649
Abstract:
All-inorganic tin halide perovskite compounds, such as CsSnI 3 , have attracted attention in the field of solar cells due to their eco-friendly properties. It is quite a challenge to fabricate high-quality CsSnI 3 perovskite films with low defect density due to the low defect tolerance and overquick crystallization growth rate. Herein, we propose a simple yet effective method to modulate the dynamic balance between the growth and nucleation of perovskite crystals for black orthorhombic phase CsSnI 3 . We found that well-crystallized CsSnI 3 thin films can be easily obtained through two-step thermal annealing at low temperatures of 40 °C and 70 °C. We further introduced 1-(4-carboxyphenyl)-2-thiourea to coordinate with surface undercoordinated Sn 2+ cations of CsSnI 3 thin films through CS and CO functional groups, significantly decreasing the defect density. The CsSnI 3 perovskite solar cells based on a printable c-TiO 2 /m-TiO 2 /Al 2 O 3 /NiO/carbon mesoporous framework achieved a power conversion efficiency of 8.03% with high reproducibility, which is the best efficiency among those reported for all-inorganic CsSnI 3 mesoporous perovskite solar cells to date. Furthermore, the corresponding devices retained 90% of the initial efficiency after 3000 hours of storage in a N 2 -filled glovebox.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702232-8
detail.hit.zdb_id:
2696984-1
