Imperial College London
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Professor Martyn A McLachlan

Faculty of Engineering, Department of Materials

Professor of Thin Films, Interfaces and Electronic Devices
 
 
 
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Contact

 

+44 (0)20 7594 9692martyn.mclachlan Website

 
 
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Location

 

401 HMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Lin:2018:10.1039/c8se00095f,
author = {Lin, C and Pont, S and Kim, J and Du, T and Xu, S and Li, X and Bryant, D and McLachlan, MA and Durrant, J},
doi = {10.1039/c8se00095f},
journal = {Sustainable Energy and Fuels},
pages = {1686--1692},
title = {Passivation of oxygen and light induced degradation by the PCBM electron transport layer in planar perovskite solar cells},
url = {http://dx.doi.org/10.1039/c8se00095f},
volume = {2},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Herein, we investigate the causes of a 20 fold improved stability of inverted, planar structure (ITO/PTAA/CH3NH3PbI3/PCBM/BCP/Cu) compared to conventional structure devices (FTO/compact-TiO2/meso-TiO2/CH3NH3PbI3/spiro-OMeTAD/Au) under oxygen and light stress. The PCBM layer is shown to function as an oxygen diffusion barrier and passivation layer against superoxide mediated degradation. The passivation properties of the PCBM layer are shown to depend on the electron affinity of fullerene acceptor, attributed to low LUMO level of PCBM energetically inhibiting superoxide generation. We also find the planar structure devices shows slower lateral oxygen diffusion rates than mesoporous scaffold devices, with these slower diffusion rates (days per 100 μm) also being a key factor in enhancing stability. Faster degradation is observed under voltage cycling, attributed to oxygen diffusion kinetics being ion motion dependent. We conclude by discussing the implications of these results for the design of perovskite solar cells with improved resistance to oxygen and light induced degradation.
AU  - Lin,C
AU  - Pont,S
AU  - Kim,J
AU  - Du,T
AU  - Xu,S
AU  - Li,X
AU  - Bryant,D
AU  - McLachlan,MA
AU  - Durrant,J
DO  - 10.1039/c8se00095f
EP  - 1692
PY  - 2018///
SN  - 2398-4902
SP  - 1686
TI  - Passivation of oxygen and light induced degradation by the PCBM electron transport layer in planar perovskite solar cells
T2  - Sustainable Energy and Fuels
UR  - http://dx.doi.org/10.1039/c8se00095f
UR  - http://hdl.handle.net/10044/1/58487
VL  - 2
ER  -
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