Temperature‐Dependent Charge‐Carrier Dynamics in CH 3 NH 3 PbI 3 Perovskite Thin Films
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Abstract
The photoluminescence, transmittance, charge‐carrier recombination dynamics, mobility, and diffusion length of CH 3 NH 3 PbI 3 are investigated in the temperature range from 8 to 370 K. Profound changes in the optoelectronic properties of this prototypical photovoltaic material are observed across the two structural phase transitions occurring at 160 and 310 K. Drude‐like terahertz photoconductivity spectra at all temperatures above 80 K suggest that charge localization effects are absent in this range. The monomolecular charge‐carrier recombination rate generally increases with rising temperature, indicating a mechanism dominated by ionized impurity mediated recombination. Deduced activation energies E a…
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5Topics & keywords
Topics
Keywords
- Materials science
- Charge carrier
- Perovskite (structure)
- Atmospheric temperature range
- Diffusion
- Phase (matter)
- Photoconductivity
- Carrier lifetime
UN Sustainable Development Goals
- Affordable and clean energy
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