Charge Carrier Lifetimes Exceeding 15 μs in Methylammonium Lead Iodide Single Crystals
- 24 February 2016
- journal article
- research article
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry Letters
- Vol. 7 (5), 923-928
- https://doi.org/10.1021/acs.jpclett.6b00269
Abstract
The charge carrier lifetime in organic-inorganic perovskites is one of the most important parameters for modeling and design of solar cells and other types of devices. In this work, we use CH3NH3PbI3 single crystal as a model system to study optical absorption, charge carrier generation, and recombination lifetimes. We show that commonly applied photoluminescence lifetime measurements may dramatically underestimate the intrinsic carrier lifetime in CH3NH3PbI3, which could be due to severe charge recombination at the crystal surface and/or fast electron-hole recombination close to the surface. By using the time-resolved microwave conductivity technique, we investigated the lifetime of free mobile charges inside the crystals. Most importantly, we find that for homogeneous excitation throughout the crystal, the charge carrier lifetime exceeds 15 μs. This means that the diffusion length in CH3NH3PbI3 can be as large as 50 μm if it is no longer limited by the dimensions of the crystallites.Keywords
Funding Information
- Technologiestichting STW
- Office of Integrative Activities (OIA-1538893)
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek
This publication has 32 references indexed in Scilit:
- Improved performance and stability of perovskite solar cells by crystal crosslinking with alkylphosphonic acid ω-ammonium chloridesNature Chemistry, 2015
- Metal-halide perovskites for photovoltaic and light-emitting devicesNature Nanotechnology, 2015
- Scalable fabrication of efficient organolead trihalide perovskite solar cells with doctor-bladed active layersEnergy & Environmental Science, 2015
- Compositional engineering of perovskite materials for high-performance solar cellsNature, 2015
- Growth of CH3NH3PbI3 cuboids with controlled size for high-efficiency perovskite solar cellsNature Nanotechnology, 2014
- Enhanced Photoluminescence and Solar Cell Performance via Lewis Base Passivation of Organic–Inorganic Lead Halide PerovskitesACS Nano, 2014
- Continuing to soarNature Materials, 2014
- Interface engineering of highly efficient perovskite solar cellsScience, 2014
- The emergence of perovskite solar cellsNature Photonics, 2014
- Sequential deposition as a route to high-performance perovskite-sensitized solar cellsNature, 2013