Hot carriers in halide perovskites : how hot truly?

Slow hot carrier cooling in halide perovskites holds the key to the development of hot carrier (HC) perovskite solar cells. For accurate modeling and pragmatic design of HC materials and devices, it is essential that HC temperatures are reliably determined. A common approach involves fitting the hig...

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Main Authors: Lim, Melvin Jia Wei, Giovanni, David, Righetto, Marcello, Feng, Minjun, Mhaisalkar, Subodh Gautam, Mathews, Nripan, Sum, Tze Chien
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/137591
https://doi.org/10.21979/N9/MJZNDC
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1375912023-02-28T19:48:03Z Hot carriers in halide perovskites : how hot truly? Lim, Melvin Jia Wei Giovanni, David Righetto, Marcello Feng, Minjun Mhaisalkar, Subodh Gautam Mathews, Nripan Sum, Tze Chien School of Physical and Mathematical Sciences Energy Research Institute @ NTU (ERI@N) Science::Physics Engineering::Materials Perovskite Hot Carrier Cooling Slow hot carrier cooling in halide perovskites holds the key to the development of hot carrier (HC) perovskite solar cells. For accurate modeling and pragmatic design of HC materials and devices, it is essential that HC temperatures are reliably determined. A common approach involves fitting the high-energy tail of the main photobleaching peak in a transient absorption spectrum with a Maxwell-Boltzmann distribution. However, this approach is problematic because of complications from the overlap of several photophysical phenomena and a lack of consensus in the community on the fitting procedures. Herein, we propose a simple approach that circumvents these challenges. Through tracking the broadband spectral evolution and accounting for bandgap renormalization and spectral line width broadening effects, our method extracts not only accurate and consistent carrier temperatures but also other important parameters such as the quasi-Fermi levels, bandgap renormalization constant, etc. Establishing a reliable method for the carrier temperature determination is a step forward in the study of HCs for next-generation perovskite optoelectronics. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Accepted version 2020-04-03T04:29:29Z 2020-04-03T04:29:29Z 2020 Journal Article Lim, M. J. W., Giovanni, D., Righetto, M., Feng, M., Mhaisalkar, S. G., Mathews, N., & Sum, T. C. (2020). Hot carriers in halide perovskites : how hot truly?. The Journal of Physical Chemistry Letters, 11(7), 2743-2750. doi:10.1021/acs.jpclett.0c00504 1948-7185 https://hdl.handle.net/10356/137591 10.1021/acs.jpclett.0c00504 32183508 7 11 2743 2750 en Nanyang Technological University start-up grant M4080514 JSPS-NTU Joint Research Project M4082176 Ministry of Education AcRF Tier 1 grant RG91/19 Ministry of Education AcRF Tier 2 grant MOE2016-T2-1-034 Ministry of Education AcRF Tier 2 grant MOE2017-T2-2-002 Ministry of Education AcRF Tier 2 grant MOE2019-T2-1-097 Singapore National Research Foundation Investigatorship NRF-NRFI-2018-04 Singapore National Research Foundation Competitive Research Programme NRF-CRP14-2014-03 The Journal of Physical Chemistry Letters https://doi.org/10.21979/N9/MJZNDC This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpclett.0c00504 application/pdf application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
Engineering::Materials
Perovskite
Hot Carrier Cooling
spellingShingle Science::Physics
Engineering::Materials
Perovskite
Hot Carrier Cooling
Lim, Melvin Jia Wei
Giovanni, David
Righetto, Marcello
Feng, Minjun
Mhaisalkar, Subodh Gautam
Mathews, Nripan
Sum, Tze Chien
Hot carriers in halide perovskites : how hot truly?
description Slow hot carrier cooling in halide perovskites holds the key to the development of hot carrier (HC) perovskite solar cells. For accurate modeling and pragmatic design of HC materials and devices, it is essential that HC temperatures are reliably determined. A common approach involves fitting the high-energy tail of the main photobleaching peak in a transient absorption spectrum with a Maxwell-Boltzmann distribution. However, this approach is problematic because of complications from the overlap of several photophysical phenomena and a lack of consensus in the community on the fitting procedures. Herein, we propose a simple approach that circumvents these challenges. Through tracking the broadband spectral evolution and accounting for bandgap renormalization and spectral line width broadening effects, our method extracts not only accurate and consistent carrier temperatures but also other important parameters such as the quasi-Fermi levels, bandgap renormalization constant, etc. Establishing a reliable method for the carrier temperature determination is a step forward in the study of HCs for next-generation perovskite optoelectronics.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Lim, Melvin Jia Wei
Giovanni, David
Righetto, Marcello
Feng, Minjun
Mhaisalkar, Subodh Gautam
Mathews, Nripan
Sum, Tze Chien
format Article
author Lim, Melvin Jia Wei
Giovanni, David
Righetto, Marcello
Feng, Minjun
Mhaisalkar, Subodh Gautam
Mathews, Nripan
Sum, Tze Chien
author_sort Lim, Melvin Jia Wei
title Hot carriers in halide perovskites : how hot truly?
title_short Hot carriers in halide perovskites : how hot truly?
title_full Hot carriers in halide perovskites : how hot truly?
title_fullStr Hot carriers in halide perovskites : how hot truly?
title_full_unstemmed Hot carriers in halide perovskites : how hot truly?
title_sort hot carriers in halide perovskites : how hot truly?
publishDate 2020
url https://hdl.handle.net/10356/137591
https://doi.org/10.21979/N9/MJZNDC
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