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research article

Unraveling the Reasons for Efficiency Loss in Perovskite Solar Cells

Lee, Yong Hui  
•
Luo, Jingshan  
•
Humphry-Baker, Robin  
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2015
Advanced Functional Materials

The effect of the presence of unreacted PbI2 on the perovskite solar cells efficiency is reported. N,N-Dimethylformamide vapor treatment is introduced to study the influence of complete conversion to a power conversion efficiency of the device. It is discovered that the optimized morphology of the PbI2 under layer is essential to form a dense perovskite layer preventing recombination by direct contact between TiO2 and a hole transporting layer, and to increase the charge collection efficiency. The present findings provide an insight into the morphology and growth mechanism of perovskite layer, the correlation between the device performance, and the film deposition process.

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Type
research article
DOI
10.1002/adfm.201501024
Web of Science ID

WOS:000357268900015

Author(s)
Lee, Yong Hui  
•
Luo, Jingshan  
•
Humphry-Baker, Robin  
•
Gao, Peng  
•
Graetzel, Michael  
•
Nazeeruddin, Mohammad Khaja  
Date Issued

2015

Publisher

Wiley-Blackwell

Published in
Advanced Functional Materials
Volume

25

Issue

25

Start page

3925

End page

3933

Subjects

methylammonium lead iodide

•

PbI2

•

perovskite

•

solution process

•

two-step method

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPI  
Available on Infoscience
September 28, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/119005
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