Cargando…

Protecting hot carriers by tuning hybrid perovskite structures with alkali cations

Successful implementation of hot carrier solar cells requires preserving high carrier temperature as carriers migrate through the active layer. Here, we demonstrated that addition of alkali cations in hybrid organic-inorganic lead halide perovskites led to substantially elevated carrier temperature,...

Descripción completa

Detalles Bibliográficos
Autores principales: Wang, Ti, Jin, Linrui, Hidalgo, Juanita, Chu, Weibin, Snaider, Jordan M., Deng, Shibin, Zhu, Tong, Lai, Barry, Prezhdo, Oleg, Correa-Baena, Juan-Pablo, Huang, Libai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7608821/
https://www.ncbi.nlm.nih.gov/pubmed/33097534
http://dx.doi.org/10.1126/sciadv.abb1336
_version_ 1783604908350504960
author Wang, Ti
Jin, Linrui
Hidalgo, Juanita
Chu, Weibin
Snaider, Jordan M.
Deng, Shibin
Zhu, Tong
Lai, Barry
Prezhdo, Oleg
Correa-Baena, Juan-Pablo
Huang, Libai
author_facet Wang, Ti
Jin, Linrui
Hidalgo, Juanita
Chu, Weibin
Snaider, Jordan M.
Deng, Shibin
Zhu, Tong
Lai, Barry
Prezhdo, Oleg
Correa-Baena, Juan-Pablo
Huang, Libai
author_sort Wang, Ti
collection PubMed
description Successful implementation of hot carrier solar cells requires preserving high carrier temperature as carriers migrate through the active layer. Here, we demonstrated that addition of alkali cations in hybrid organic-inorganic lead halide perovskites led to substantially elevated carrier temperature, reduced threshold for phonon bottleneck, and enhanced hot carrier transport. The synergetic effects from the Rb, Cs, and K cations result in ~900 K increase in the effective carrier temperature at a carrier density around 10(18) cm(−3) with an excitation 1.45 eV above the bandgap. In the doped thin films, the protected hot carriers migrate 100 s of nanometers longer than the undoped sample as imaged by ultrafast microscopy. We attributed these improvements to the relaxation of lattice strain and passivation of halide vacancies by alkali cations based on x-ray structural characterizations and first principles calculations.
format Online
Article
Text
id pubmed-7608821
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher American Association for the Advancement of Science
record_format MEDLINE/PubMed
spelling pubmed-76088212020-11-13 Protecting hot carriers by tuning hybrid perovskite structures with alkali cations Wang, Ti Jin, Linrui Hidalgo, Juanita Chu, Weibin Snaider, Jordan M. Deng, Shibin Zhu, Tong Lai, Barry Prezhdo, Oleg Correa-Baena, Juan-Pablo Huang, Libai Sci Adv Research Articles Successful implementation of hot carrier solar cells requires preserving high carrier temperature as carriers migrate through the active layer. Here, we demonstrated that addition of alkali cations in hybrid organic-inorganic lead halide perovskites led to substantially elevated carrier temperature, reduced threshold for phonon bottleneck, and enhanced hot carrier transport. The synergetic effects from the Rb, Cs, and K cations result in ~900 K increase in the effective carrier temperature at a carrier density around 10(18) cm(−3) with an excitation 1.45 eV above the bandgap. In the doped thin films, the protected hot carriers migrate 100 s of nanometers longer than the undoped sample as imaged by ultrafast microscopy. We attributed these improvements to the relaxation of lattice strain and passivation of halide vacancies by alkali cations based on x-ray structural characterizations and first principles calculations. American Association for the Advancement of Science 2020-10-23 /pmc/articles/PMC7608821/ /pubmed/33097534 http://dx.doi.org/10.1126/sciadv.abb1336 Text en Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/ https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Wang, Ti
Jin, Linrui
Hidalgo, Juanita
Chu, Weibin
Snaider, Jordan M.
Deng, Shibin
Zhu, Tong
Lai, Barry
Prezhdo, Oleg
Correa-Baena, Juan-Pablo
Huang, Libai
Protecting hot carriers by tuning hybrid perovskite structures with alkali cations
title Protecting hot carriers by tuning hybrid perovskite structures with alkali cations
title_full Protecting hot carriers by tuning hybrid perovskite structures with alkali cations
title_fullStr Protecting hot carriers by tuning hybrid perovskite structures with alkali cations
title_full_unstemmed Protecting hot carriers by tuning hybrid perovskite structures with alkali cations
title_short Protecting hot carriers by tuning hybrid perovskite structures with alkali cations
title_sort protecting hot carriers by tuning hybrid perovskite structures with alkali cations
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7608821/
https://www.ncbi.nlm.nih.gov/pubmed/33097534
http://dx.doi.org/10.1126/sciadv.abb1336
work_keys_str_mv AT wangti protectinghotcarriersbytuninghybridperovskitestructureswithalkalications
AT jinlinrui protectinghotcarriersbytuninghybridperovskitestructureswithalkalications
AT hidalgojuanita protectinghotcarriersbytuninghybridperovskitestructureswithalkalications
AT chuweibin protectinghotcarriersbytuninghybridperovskitestructureswithalkalications
AT snaiderjordanm protectinghotcarriersbytuninghybridperovskitestructureswithalkalications
AT dengshibin protectinghotcarriersbytuninghybridperovskitestructureswithalkalications
AT zhutong protectinghotcarriersbytuninghybridperovskitestructureswithalkalications
AT laibarry protectinghotcarriersbytuninghybridperovskitestructureswithalkalications
AT prezhdooleg protectinghotcarriersbytuninghybridperovskitestructureswithalkalications
AT correabaenajuanpablo protectinghotcarriersbytuninghybridperovskitestructureswithalkalications
AT huanglibai protectinghotcarriersbytuninghybridperovskitestructureswithalkalications