self-assembled two-dimensional perovskites layers for...

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

Self-Assembled Two-Dimensional Perovskites Layers for Efficient Printable Solar Cells | Chuantian Zuo

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


2D vs 3D perovskite

Energy Environ. Sci., 2018, 11, 234

3D 2D

4 | Self-Assembled Two-Dimensional Perovskites Layers for Efficient Printable Solar Cells | Chuantian Zuo

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


Random orientation

Relation between orientation and PCE for 2D perovskite


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



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


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


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


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


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


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


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...

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