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Performance enhancement of low temperature processed tin oxide as an electron transport layer for perovskite solar cells under ambient conditions
Author(s) -
Kouhnavard Mojgan,
Niedzwiedzki Dariusz M.,
Biswas Pratim
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5754
Subject(s) - materials science , perovskite (structure) , layer (electronics) , graphene , doping , energy conversion efficiency , oxide , tin oxide , spin coating , photoluminescence , optoelectronics , chemical engineering , nanotechnology , coating , metallurgy , engineering
Summary Most of the SnO 2 ‐based perovskite cells (PSC) are either fabricated in a controlled environment or have low energy conversion efficiencies. In this research, we used a low‐temperature processed SnO 2 as an electron transport layer (ETL) and fabricated planar PSC via a spin coating technique under ambient condition. By adjusting the concentration of SnO 2 precursor solution, the efficiency of PSC was enhanced from 4% to 9%. Furthermore, different weight ratios of 3D‐structured crumpled graphene oxide (CGO), which was synthesized using a one‐step furnace aerosol reactor, were introduced into the SnO 2 ETL to improve the PSC performance. The 0.25% CGO ratio resulted in a cell with highest J sc of 21 mA/cm 2 and the efficiency of 11%. Photoluminescence measurements also showed the benefit of doping SnO 2 layer with CGO in charge transfer in the ETL and from the perovskite layer suppressing carrier recombination. The SnO 2 ‐based ETL with the presence of CGO can be a promising ETL for low‐cost planar PSCs as well as tandem cells, fabricated under ambient condition.