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Resonance Raman and Excitation Energy Dependent Charge Transfer Mechanism in Halide-Substituted Hybrid Perovskite Solar Cells

Byung-wook Park, Sagar Jain, Xiaoliang Zhang, Anders Hagfeldt, Gerrit Boschloo, Tomas Edvinsson

ACS Nano, Volume: 9, Issue: 2, Pages: 2088 - 2101

Swansea University Author: Sagar Jain

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DOI (Published version): 10.1021/nn507345e

Abstract

Organo-metal halide perovskites (OMHPs) are materials with attractive properties for optoelectronics. They made a recent introduction in the photovoltaics world by methylammonium (MA) lead triiodide and show remarkably improved charge separation capabilities when chloride and bromide are added. Here...

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Published in: ACS Nano
ISSN: 1936-0851 1936-086X
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa32896
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spelling 2018-05-09T16:04:09.0307204 v2 32896 2017-04-02 Resonance Raman and Excitation Energy Dependent Charge Transfer Mechanism in Halide-Substituted Hybrid Perovskite Solar Cells 7073e179bb5b82db3e3efd3a8cd07139 Sagar Jain Sagar Jain true false 2017-04-02 EEN Organo-metal halide perovskites (OMHPs) are materials with attractive properties for optoelectronics. They made a recent introduction in the photovoltaics world by methylammonium (MA) lead triiodide and show remarkably improved charge separation capabilities when chloride and bromide are added. Here we show how halide substitution in OMHPs with the nominal composition CH3NH3PbI2X, where X is I, Br, or Cl, influences the morphology, charge quantum yield, and local interaction with the organic MA cation. X-ray diffraction and photoluminescence data demonstrate that halide substitution affects the local structure in the OMHPs with separate MAPbI3 and MAPbCl3 phases. Raman spectroscopies as well as theoretical vibration calculations reveal that this at the same time delocalizes the charge to the MA cation, which can liberate the vibrational movement of the MA cation, leading to a more adaptive organic phase. The resonance Raman effect together with quantum chemical calculations is utilized to analyze the change in charge transfer mechanism upon electronic excitation and gives important clues for the mechanism of the much improved photovoltage and photocurrent also seen in the solar cell performance for the materials when chloride compounds are included in the preparation. Journal Article ACS Nano 9 2 2088 2101 1936-0851 1936-086X 31 12 2015 2015-12-31 10.1021/nn507345e COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2018-05-09T16:04:09.0307204 2017-04-02T00:23:28.5392110 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Byung-wook Park 1 Sagar Jain 2 Xiaoliang Zhang 3 Anders Hagfeldt 4 Gerrit Boschloo 5 Tomas Edvinsson 6
title Resonance Raman and Excitation Energy Dependent Charge Transfer Mechanism in Halide-Substituted Hybrid Perovskite Solar Cells
spellingShingle Resonance Raman and Excitation Energy Dependent Charge Transfer Mechanism in Halide-Substituted Hybrid Perovskite Solar Cells
Sagar Jain
title_short Resonance Raman and Excitation Energy Dependent Charge Transfer Mechanism in Halide-Substituted Hybrid Perovskite Solar Cells
title_full Resonance Raman and Excitation Energy Dependent Charge Transfer Mechanism in Halide-Substituted Hybrid Perovskite Solar Cells
title_fullStr Resonance Raman and Excitation Energy Dependent Charge Transfer Mechanism in Halide-Substituted Hybrid Perovskite Solar Cells
title_full_unstemmed Resonance Raman and Excitation Energy Dependent Charge Transfer Mechanism in Halide-Substituted Hybrid Perovskite Solar Cells
title_sort Resonance Raman and Excitation Energy Dependent Charge Transfer Mechanism in Halide-Substituted Hybrid Perovskite Solar Cells
author_id_str_mv 7073e179bb5b82db3e3efd3a8cd07139
author_id_fullname_str_mv 7073e179bb5b82db3e3efd3a8cd07139_***_Sagar Jain
author Sagar Jain
author2 Byung-wook Park
Sagar Jain
Xiaoliang Zhang
Anders Hagfeldt
Gerrit Boschloo
Tomas Edvinsson
format Journal article
container_title ACS Nano
container_volume 9
container_issue 2
container_start_page 2088
publishDate 2015
institution Swansea University
issn 1936-0851
1936-086X
doi_str_mv 10.1021/nn507345e
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 0
active_str 0
description Organo-metal halide perovskites (OMHPs) are materials with attractive properties for optoelectronics. They made a recent introduction in the photovoltaics world by methylammonium (MA) lead triiodide and show remarkably improved charge separation capabilities when chloride and bromide are added. Here we show how halide substitution in OMHPs with the nominal composition CH3NH3PbI2X, where X is I, Br, or Cl, influences the morphology, charge quantum yield, and local interaction with the organic MA cation. X-ray diffraction and photoluminescence data demonstrate that halide substitution affects the local structure in the OMHPs with separate MAPbI3 and MAPbCl3 phases. Raman spectroscopies as well as theoretical vibration calculations reveal that this at the same time delocalizes the charge to the MA cation, which can liberate the vibrational movement of the MA cation, leading to a more adaptive organic phase. The resonance Raman effect together with quantum chemical calculations is utilized to analyze the change in charge transfer mechanism upon electronic excitation and gives important clues for the mechanism of the much improved photovoltage and photocurrent also seen in the solar cell performance for the materials when chloride compounds are included in the preparation.
published_date 2015-12-31T03:40:27Z
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score 11.012678

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