26 / 39
Volume 4
Nano Research & Applications
ISSN: 2471-9838
Page 85
JOINT EVENT
August 16-18, 2018 | Dublin, Ireland
&
12
th
Edition of International Conference on
Nanopharmaceutics and Advanced Drug Delivery
25
th
Nano Congress for
Future Advancements
Nano Congress 2018
&
Nano Drug Delivery 2018
August 16-18, 2018
Low-temperature SnO
2
-modified TiO
2
yields record efficiency for normal planar perovskite solar
modules
Guan-Jun Yang
Xi'an Jiaotong University, China
H
ybrid organic-inorganic perovskite solar cells (PSCs), particularly for the planar PSCs, attracted significant attention
because of their high efficiency, low fabrication costs, and simple preparation process. However, planar PSCs exhibit
lower efficiency and stability than mesoporous PSCs, primarily owing to defects in the electron transport layer (ETL). Here,
we introduce a SnO
2
nanoparticle modified TiO
2
film (SnO
2
@TiO
2
) as the ETL. In addition, we propose a simple three-step
chemical bath method to achieve such SnO
2
@TiO
2
structure at low temperatures (140°C). The SnO
2
@TiO
2
ETL significantly
enhances the electron extraction and decreases the trap states at the perovskite/ETL interface. We achieved average efficiencies
at reverse scan and forward scan of 21.27%, 19.79%, 17.21% and 16.31% for device area of 0.10 cm2, 1.13 cm
2
, 5.25 cm
2
and 10.56 cm
2
respectively. Besides, we achieved a certificated efficiency of 15.65% for the normal planar perovskite solar
module with masked area of 10.55 cm
2
. The SnO
2
@TiO
2
-based PSCs exhibit enhanced photocurrent and reduced hysteresis.
Furthermore, the solar cell retained about 89% of its initial efficiency after about 750 hours of aging in dark and about 93% for
528 hours under full-sun illumination. Because of the low-temperature processability and the absence of spin-coating steps,
SnO
2
@TiO
2
ETLs will provide a promising path for the commercialization of PSCs.
ygj@mail.xjtu.edu.cnNano Res Appl 2018, Volume 4
DOI: 10.21767/2471-9838-C3-015