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The investigation of all-solid-state perovskitesensitized solar cells Qijie Wu, Andrew Nattestad, Chaiyuth Sae-Kung, Victor Malgras, Jung Ho Kim, Attila J. Mozer ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Faculty, Innovation Campus, Squires Way, University of Wollongong NSW 2522 Email: qw988@uowmail.edu.au The photocurrent density bias voltage curves and IPCE curves are

Introduction

presented as Fig 3. In comparison, the device with 650nm TiO2 film shows higher short-circuit photocurrent density, open-circuit voltage and

Solid-state DSSCs achieved a great progress

efficiency. The incident photon-to-electron conversion efficiency (d)

during last two decades. The first working

reaches a broad absorption from around 400nm to 800nm. It indicates that

ssDSSC was published with PCE of 0.74% in

this solid state device based on methyl ammonium lead iodide achieves

1998 using dye N719 as the light harvester

panchromatic absorption.

and spiro-OMeTAD as a hole transfer material. And the latest record in 2013 reached approximately 15% published by Gratzel’s group which introduced organometal halide perovskite to capture

Fig1. A crystal structure of PbX2Y(CH3NH3), X,Y=Cl, I

photons. Pervoskite (Fig1.) as a sensitizer shows a superb light-harvesting ability which

a

b

c

d

is a promising replacement of in DSSCs.

Fig3. Part a is the J-V curve of devices with 1μm of TiO2 film, part b is the J-V curve of devices with 650nm of TiO2 film, part c is the J-V curve of devices with 200nm of TiO2 film, part d is their IPCE curves.

Efficiency (%)

Fig2. Left is the top-view of the device structure with the cross-sectional structure and right is the cross-sectional SEC imageref1.

Aim

TiO2 thickness (nm)

Based on the power conversion efficiency of the devices, preliminary

Fig4. This trend bar shows efficiency varies with the thickness of TiO2 film.

investigation is conducted by looking at the effect of TiO2 film thickness on the open circuit voltage (Voc), short circuit current (Jsc) and fill factor.

Results

Conclusions 

dilution of the 90T Dyesol paste. Thicker and thinner TiO2 anodes

The anode electrodes with varying thickness (1μm, 650nm, 200nm) of

are indispensible to broaden the range of thickness for comparison.

TiO2 film are prepared by screen printing. The photovoltaic performance 

is listed as table 1.

Different thickness of printed TiO2 film can be achieved by different

The device can obtain relatively high performance with around 650nm of TiO2 film thickness.

Table1. The performance of devices with different TiO2 thickness 2

TiO2 Thickness (nm) Voc (mV) Jsc (mA/cm ) Fill factor Efficiency (%) 1000 815 7.75 0.622 3.93 650 821 10.32 0.596 5.05 200 763 6.1 0.691 3.21

References 1. Park, N.-G. J. Phys. Chem. Lett. 2013, 4, 2423-2429. 2. Kim, H.-S.; Lee, C.-R.; Im, J.-H.; Lee, K.-B.; Moehl, T.; Marchioro, A.; Moon, S.J.; Humphry-Baker, R.; Yum, J.-H.; Moser, J. E.; et al. Sci. Rep. 2012, 2, 591.


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