Imperial College London
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Dr Robert Hoye, FIMMM CEng CSci

Faculty of Engineering, Department of Materials

Honorary Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 6048r.hoye Website

 
 
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Location

 

2.27Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Li:2020:10.1021/acsami.9b19153,
author = {Li, Y and Hoye, RLZ and Gao, H and Yan, L and Zhang, X and Zhou, Y and MacManus-Driscoll, JL and Gan, J},
doi = {10.1021/acsami.9b19153},
journal = {ACS Applied Materials & Interfaces},
pages = {7135--7143},
title = {Over 20% efficiency in methylammonium lead Iodide perovskite solar cells with enhanced stability via “in-situ solidification” of the TiO2 compact layer},
url = {http://dx.doi.org/10.1021/acsami.9b19153},
volume = {12},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In methylammonium lead iodide (MAPbI3) perovskite solar cells (PSCs), the device performance is strongly influenced by the TiO2 elec-tron transport layer (ETL). Typically, the ETL needs to simultaneously be thin and pinhole-free in order to have high transmittance and avoid shunting. In this work, we develop an “in-situ solidification” process following spin coating, in which the titanium-based precursor (ti-tanium (diisopropoxide) bis (2,4-pentaneclionate)) is dried under vacuum to rapidly achieve continuous TiO2 layers. We refer to this as gas-phase quenching. This results in thin (60±10 nm), uniform and pinhole-free TiO2 films. The PSCs based on the gas-phase quenched TiO2 exhibits improved power conversion efficiency, with a median value of 18.23% (champion value of 20.43%), compared to 9.03% and 14.09% for the untreated devices. Gas-phase quenching is further shown to be effective in enabling efficient charge transfer at the MAPbI3/TiO2 heterointerface. Furthermore, the stability of the gas-phase quenched devices is enhanced in ambient air as well as under 1-sun illumination. In addition, we achieve 12.1% efficiency in upscaled devices (1.1 cm2 active area).
AU  - Li,Y
AU  - Hoye,RLZ
AU  - Gao,H
AU  - Yan,L
AU  - Zhang,X
AU  - Zhou,Y
AU  - MacManus-Driscoll,JL
AU  - Gan,J
DO  - 10.1021/acsami.9b19153
EP  - 7143
PY  - 2020///
SN  - 1944-8244
SP  - 7135
TI  - Over 20% efficiency in methylammonium lead Iodide perovskite solar cells with enhanced stability via “in-situ solidification” of the TiO2 compact layer
T2  - ACS Applied Materials & Interfaces
UR  - http://dx.doi.org/10.1021/acsami.9b19153
UR  - https://pubs.acs.org/doi/10.1021/acsami.9b19153
UR  - http://hdl.handle.net/10044/1/76266
VL  - 12
ER  -
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