Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/138049
Title: Localized traps limited recombination in lead bromide perovskites
Authors: Fu, Jianhui
Nur Fadilah Jamaludin
Wu, Bo
Li, Mingjie
Solanki, Ankur
Ng, Yan Fong
Mhaisalkar, Subodh
Huan, Alfred Cheng Hon
Sum, Tze Chien
Keywords: Science::Physics
Issue Date: 2019
Source: Fu, J., Nur Fadilah Jamaludin, Wu, B., Li, M., Solanki, A., Ng, Y. F., . . . Sum, T. C. (2019). Localized traps limited recombination in lead bromide perovskites. Advanced Energy Materials, 9(12), 1803119-. doi:10.1002/aenm.201803119
Project: JSPS-NTU Joint Research Project M4082176
RG173/16
MOE2015-T2-2-015
MOE2016-T2-1-034
MOE2017-T2-2-002
NRF-CRP14-2014-03
NRF-NRFI-2018-04
Journal: Advanced Energy Materials
Abstract: Traps exert an omnipotent influence over the performance of halide perovskite optoelectronic devices. A clear understanding of the origin and nature of the traps in halide perovskites is the key to controlling them and realizing optimal devices. Herein, the role of localized traps on the optical properties of lead bromide perovskite films is investigated. In the low-temperature orthorhombic phase of CH3NH3PbBr3 perovskite, band-edge carrier dynamics exhibit a power-law decay due to the presence of structural-disorder-induced localized traps, which has a depth of ≈40 meV. The continuous distribution of these localized traps gives rise to a broad sub-band-gap emission that becomes more prominent in thicker films with a larger trap density. The presence of this emission only from the hybrid organic–inorganic perovskites points to the vital role of organic dipoles in localized trap states formation. This study explicates the nature of these localized traps as well as their nontrivial role in carrier recombination kinetics, which is of fundamental importance in perovskites optoelectronics.
URI: https://hdl.handle.net/10356/138049
ISSN: 1614-6832
DOI: 10.1002/aenm.201803119
Rights: This is the peer reviewed version of the following article: Fu, J., Nur Fadilah Jamaludin, Wu, B., Li, M., Solanki, A., Ng, Y. F., . . . Sum, T. C. (2019). Localized traps limited recombination in lead bromide perovskites. Advanced Energy Materials, 9(12), 1803119-, which has been published in final form at https://doi.org/10.1002/aenm.201803119. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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