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{Ambroz:2019:10.1002/celc.201900532,
author = {Ambroz, F and Sathasivam, S and Lee, R and Gadipelli, S and Lin, C and Xu, S and Poduval, RK and Mclachlan, MA and Papakonstantinou, I and Parkin, IP and Macdonald, TJ},
doi = {10.1002/celc.201900532},
journal = {ChemElectroChem},
pages = {3590--3598},
title = {Influence of lithium and lanthanum treatment on TiO2 nanofibers and their application in nip solar cells},
url = {http://dx.doi.org/10.1002/celc.201900532},
volume = {6},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The addition of cations to TiO2 photoelectrodes is routinely accepted as a route to enhance the performance of conventional nip solar cells. However, this is typically achieved in multiple steps or by the incorporation of expensive and hydroscopic cationic precursors such as lithium bis(trifluoromethanesulfonyl)imide. In addition, it is often unclear as to whether the incorporation of such cation sources is inducing “doping” or simply transformed into cationic oxides on the surface of the photoelectrodes. In this study, TiO2 nanofibers were produced through a simple electrospinning technique and modified by introducing lithium and lanthanum precursors in one step. Our results show that the addition of both cations caused minimal substitutional or interstitial doping of TiO2. BrunauerEmmettTeller measurements showed that lanthanumtreated TiO2 nanofibers had an increase in surface area, which even exceeded that of TiO2 P25 nanoparticles. Finally, treated and untreated TiO2 nanofibers were used in nip solar cells. Photovoltaic characteristics revealed that lanthanum treatment was beneficial, whereas lithium treatment was found to be detrimental to the device performance for both dyesensitized and perovskite solar cells. The results discuss new fundamental understandings for two of the commonly incorporated cationic dopants in TiO2 photoelectrodes, lithium and lanthanum, and present a significant step forward in advancing the field of materials chemistry for photovoltaics.
AU  - Ambroz,F
AU  - Sathasivam,S
AU  - Lee,R
AU  - Gadipelli,S
AU  - Lin,C
AU  - Xu,S
AU  - Poduval,RK
AU  - Mclachlan,MA
AU  - Papakonstantinou,I
AU  - Parkin,IP
AU  - Macdonald,TJ
DO  - 10.1002/celc.201900532
EP  - 3598
PY  - 2019///
SN  - 2196-0216
SP  - 3590
TI  - Influence of lithium and lanthanum treatment on TiO2 nanofibers and their application in nip solar cells
T2  - ChemElectroChem
UR  - http://dx.doi.org/10.1002/celc.201900532
UR  - https://onlinelibrary.wiley.com/doi/full/10.1002/celc.201900532
UR  - http://hdl.handle.net/10044/1/72925
VL  - 6
ER  -
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