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

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

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

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

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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

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

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

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

Self-assembly drop-casting method

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

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Substrate size: 5×5 cm

Perform in air Non-spin coating Suitable for scaling up

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

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Optical absorbance mapping

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

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Thickness control: Concentration Temperature

Size control: Substrate size Volume of solution Temperature

Film thickness and size control

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

Shape control

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hydrophobic patterns Shape controlled films3D printer

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

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XRD GIWAX

Crystal orientation

Random orientation

Verticalorientation

Nature, 2016, 536, 312

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

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RMS roughness 6.4 nm

Cross section SEM

AFM

Morphology

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

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

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

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

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

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Store in glovebox

Without encapsulation

160 days

Stability

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

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Slot-die coating for 2D-perovskite layer

Nano energy, 2018, 46, 185

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

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

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

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

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

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