self-assembled two-dimensional perovskites layers for...
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Self-Assembled Two-Dimensional Perovskites Layers for Efficient Printable Solar Cells
Dr Chuantian Zuo, ACAP Postdoc Fellow
CSIRO Manufacturing, Australia
ACAP, 6th Dec, 2018
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A: CH3NH3+, NH=CHNH3
+, Cs+
B: Pb2+
X: I-, Br-, Cl-
ABX3
Background: perovskite solar cells
Advantages: High efficiency Low cost Low-temperature solution process Flexible and printable
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ACS Appl. Energy Mater., 2018, 1, 387
Moisture
MAPbI3 PbI2
Methods to improve stability: Hydrophobic HTL/ETL AdditivesMix-cation perovskites Inorganic perovskites
2D-perovskites
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J. Mater. Chem. A, 2017,5, 2066
Drawbacks of traditional perovskite
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2D vs 3D perovskite
Energy Environ. Sci., 2018, 11, 234
3D 2D
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Nature, 2016, 536, 312
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Stability of 2D perovskite solar cells
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Nat. Commun., 2018, 9, 1336
Vertical orientation
Random orientation
Vertical orientation
Random orientation
Relation between orientation and PCE for 2D perovskite
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Hot plate
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Substrate
2D perovskite
Nature, 2016, 536, 312
Hot casting method for 2D perovskite
PCE 4.4%
PCE 12.5%
Random orientation
Vertical orientation
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Self-assembly drop-casting method
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Substrate size: 5×5 cm
Perform in air Non-spin coating Suitable for scaling up
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Optical absorbance mapping
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Thickness control: Concentration Temperature
Size control: Substrate size Volume of solution Temperature
Film thickness and size control
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Shape control
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hydrophobic patterns Shape controlled films3D printer
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XRD GIWAX
Crystal orientation
Random orientation
Verticalorientation
Nature, 2016, 536, 312
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RMS roughness 6.4 nm
Cross section SEM
AFM
Morphology
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Scan directionVoc
[V]Jsc
[mA/cm2]FF
[%]PCE [%]
Forward 1.14 18.8 69.5 14.9Reverse 1.14 18.8 69.0 14.8
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2D perovskite solar cells
Prepared in air (except Ag electrode) without humidity control
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Cell numberVoc
[V]
Jsc
[mA cm−2]
FF
[%]
PCE
[%]
1 1.12 18.5 70.2 14.5
2 1.14 18.4 67.4 14.1
3 1.14 18.4 70.3 14.8
4 1.14 18.8 69.5 14.9
5 1.12 18.8 68.8 14.5
6 1.12 18.4 70.4 14.5
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Reproducibility
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Store in glovebox
Without encapsulation
160 days
Stability
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Slot-die coating for 2D-perovskite layer
Nano energy, 2018, 46, 185
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Method Voc
[V]Jsc
[mA/cm2]FF
[%]PCE[%]
Slot-die coating 1.06 -16.6 70.9 12.5R2R process 1.02 -13.6 57.8 8.0
Slot-die coated filmSelf-assembled film
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Summary
A simple and scalable method to prepare smooth, uniform,and highly-oriented 2D-perovskite films, without spin coating.
A PCE of 14.9% was obtained, this is the highest for 2D-perovskite solar cells fabricated by a spin-coating-freemethod.
PCEs of 12.5% and 8.0% were achieved for batch slot-die andR2R slot-die process, respectively.
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Adv. Energy Mater., 2018, 1803258
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Acknowledgements
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CSIRO
Dr Andrew Scully
Dr Doojin Vak
Dr Dechan Angmo
Monash University
Prof Chris McNeill
Dr Xuechen Jiao
Mr Wenliang Tan
National Centre for Nanoscience and Technology, ChinaProf Liming Ding
Supervisor: Dr Mei Gao
Thank you!
Self-Assembled Two-Dimensional Perovskites Layers for Efficient Printable Solar Cells | Chuantian Zuo