Abstract
Organic-inorganic hybrid perovskite materials, CH3NH3PbX3 (X = I and Br), are considered as promising candidates for emerging thin-film photovoltaics. For practical implementation, the degradation mechanism and the carrier dynamics during operation have to be clarified. We investigated the degradation mechanism and the carrier injection and recombination processes in perovskite CH3NH3PbI3 solar cells using photoluminescence (PL) and electroluminescence (EL) imaging spectroscopies. By applying forward bias-voltage, an inhomogeneous distribution of the EL intensity was clearly observed from the CH3NH3PbI3 solar cells. By comparing the PL-and EL-images, we revealed that the spatial inhomogeneity of the EL intensity is a result of the inhomogeneous luminescence efficiency in the perovskite layer. An application of bias-voltage for several tens of minutes in air caused a decrease in the EL intensity and the conversion efficiency of the perovskite solar cells. The degradation mechanism of perovskite solar cells under bias-voltage in air is discussed.
Original language | English |
---|---|
Title of host publication | Organic Photonic Materials and Devices XVIII |
Publisher | SPIE |
Volume | 9745 |
ISBN (Electronic) | 9781628419801 |
DOIs | |
Publication status | Published - 2016 |
Externally published | Yes |
Event | Organic Photonic Materials and Devices XVIII - San Francisco, United States Duration: 2016 Feb 15 → 2016 Feb 17 |
Other
Other | Organic Photonic Materials and Devices XVIII |
---|---|
Country | United States |
City | San Francisco |
Period | 16/2/15 → 16/2/17 |
Keywords
- degradation
- electroluminescence
- Organic-inorganic hybrid
- perovskite solar cells
- photoluminescence
ASJC Scopus subject areas
- Applied Mathematics
- Computer Science Applications
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics