Abstract
In this work, we explored perovskite oxide SrTiO3 (STO) for the first time as the electron-transporting layer in organolead trihalide perovskite solar cells. The steady-state photoluminescence (PL) quenching and transient absorption experiments revealed efficient photoelectron transfer from CH3NH3PbI3-xClx to STO. Perovskite solar cells with meso-STO exhibit an open circuit voltage of 1.01 V, which is 25% higher than the value of 0.81 V achieved in the control device with the conventional meso-TiO2. In addition, an increase of 17% in the fill factor was achieved by tailoring the thickness of the meso-STO layer. We found that the application of STO leads to uniform perovskite layers with large grains and complete surface coverage, leading to a high shunt resistance and improved performance. These findings suggest STO as a competitive candidate as electron transport material in organometal perovskite solar cells.
Original language | English (US) |
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Pages (from-to) | 28494-28501 |
Number of pages | 8 |
Journal | The Journal of Physical Chemistry C |
Volume | 118 |
Issue number | 49 |
DOIs | |
State | Published - Dec 2 2014 |
Bibliographical note
KAUST Repository Item: Exported on 2020-10-01Acknowledgements: Research reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST).
ASJC Scopus subject areas
- Surfaces, Coatings and Films
- General Energy
- Physical and Theoretical Chemistry
- Electronic, Optical and Magnetic Materials