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Enhanced charge carrier mobility and lifetime suppress hysteresis and improve efficiency in planar perovskite solar cells
- Source :
- Other repository, Energy & Environmental Science
- Publication Year :
- 2018
- Publisher :
- Royal Society of Chemistry (RSC), 2018.
-
Abstract
- Perovskite solar cells (PSCs) are very promising lab-scale technologies to deliver inexpensive solar electricity. Low-temperature, planar PSCs are of particularly interest for large-scale deployment due to their inherent suitability for flexible substrates and potential for silicon/perovskite tandems. So far, planar PSCs have been prone to large current-voltage hysteresis and low stabilized power output due to a number of issues associated with this kind of device configuration. We find that the suppression of the yellow-phase impurity (∂-FAPbI3) present in formamidium-based perovskites, by RbI addition, contributes to low hysteresis, higher charge carrier mobility, long-lived carrier lifetimes and a champion stabilized power output of 20.3% using SnOx as the electron selective contact. We study the effects of these impurities on the transient behavior that defines hysteresis and its relation to ionic movement. In addition, we find that the formation of a RbPbI3 phase does not significantly affect the charge carrier lifetimes and consequently the performance of the devices. This brings new physical insights onto the role of different impurities in perovskite solar cells, which make these materials so remarkable.<br />US Department of Energy, Office of Science, Office of Basic Energy Sciences (award no. DE-SC0001088)
- Subjects :
- Materials science
Silicon
chemistry.chemical_element
02 engineering and technology
Electron
010402 general chemistry
01 natural sciences
7. Clean energy
Condensed Matter::Materials Science
Planar
Impurity
Phase (matter)
Environmental Chemistry
Perovskite (structure)
Renewable Energy, Sustainability and the Environment
business.industry
021001 nanoscience & nanotechnology
Pollution
0104 chemical sciences
Hysteresis
Nuclear Energy and Engineering
chemistry
Optoelectronics
Charge carrier
0210 nano-technology
business
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Other repository, Energy & Environmental Science
- Accession number :
- edsair.doi.dedup.....29360154ab4ee07a3fe9489b1a371d48