Journal
NANO LETTERS
Volume 15, Issue 4, Pages 2402-2408Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl504701y
Keywords
Perovskite; metal oxide; solar cell; interface charge transfer; impedance
Categories
Funding
- WNLO
- 973 Program of China [2014CB643506, 2013CB922104, 2011CBA00703]
- Innovation Fund of Innovation Institute (HUST) [CXY13Q009]
Ask authors/readers for more resources
In this study, we communicate an investigation on efficient CH3NH3PbI3-based solar cells with carbon electrode using mesoporous TiO2 and NiO layers as electron and hole selective contacts. The device possesses an appreciated power conversion efficiency of 14.9% under AM 1.5G illumination. The detailed information can be disclosed with impedance spectroscopy via tuning the interfaces between CH3NH3PbI3 and different charge selective contacts. The results clearly show charge accumulation at the interface of CH3NH3PbI3. The NiO is believed to efficiently accelerate charge extraction to the external circuit. The extracted charge could improve photovoltaic performance by shifting hole Fermi level down, achieving a high device photovoltage. A fast interfacial recombination at the interface of CH3NH3PbI3/electron selective contact layer (mesoporous TiO2), occurring in millisecond domains, is the critical issue for charge carrier recombination loss.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available