Imperial College London
Alternate

ProfessorSaifHaque

Faculty of Natural Sciences, Department of Chemistry

Professor of Chemistry
 
 
 
//

Contact

 

+44 (0)20 7594 1886s.a.haque

 
 
//

Location

 

110HMolecular Sciences Research HubWhite City Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Aristidou:2015:10.1002/anie.201503153,
author = {Aristidou, N and Sanchez-Molina, I and Chotchuangchutchaval, T and Brown, M and Martinez, L and Rath, T and Haque, SA},
doi = {10.1002/anie.201503153},
journal = {Angewandte Chemie-International Edition},
pages = {8208--8212},
title = {The role of oxygen in the degradation of methylammonium lead trihalide perovskite photoactive layers},
url = {http://dx.doi.org/10.1002/anie.201503153},
volume = {54},
year = {2015}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In this paper we report on the influence of light and oxygen on the stability of CH3NH3PbI3 perovskite-based photoactive layers. When exposed to both light and dry air the mp-Al2O3/CH3NH3PbI3 photoactive layers rapidly decompose yielding methylamine, PbI2, and I2 as products. We show that this degradation is initiated by the reaction of superoxide (O2−) with the methylammonium moiety of the perovskite absorber. Fluorescent molecular probe studies indicate that the O2− species is generated by the reaction of photoexcited electrons in the perovskite and molecular oxygen. We show that the yield of O2− generation is significantly reduced when the mp-Al2O3 film is replaced with an mp-TiO2 electron extraction and transport layer. The present findings suggest that replacing the methylammonium component in CH3NH3PbI3 to a species without acid protons could improve tolerance to oxygen and enhance stability.
AU  - Aristidou,N
AU  - Sanchez-Molina,I
AU  - Chotchuangchutchaval,T
AU  - Brown,M
AU  - Martinez,L
AU  - Rath,T
AU  - Haque,SA
DO  - 10.1002/anie.201503153
EP  - 8212
PY  - 2015///
SN  - 1521-3773
SP  - 8208
TI  - The role of oxygen in the degradation of methylammonium lead trihalide perovskite photoactive layers
T2  - Angewandte Chemie-International Edition
UR  - http://dx.doi.org/10.1002/anie.201503153
UR  - https://onlinelibrary.wiley.com/doi/full/10.1002/anie.201503153
VL  - 54
ER  -
Download