Unravelling the mechanism of photo-activated ion dynamics in organic-inorganic perovskites

Sheng Chen; Xiaoming Wen; Rui Sheng; Shujuan Huang; Martin A. Green; Anita Ho-Baillie

doi:10.1109/PVSC.2016.7749704

Unravelling the mechanism of photo-activated ion dynamics in organic-inorganic perovskites

Sheng Chen, Xiaoming Wen, Rui Sheng, Shujuan Huang, Martin A. Green, Anita Ho-Baillie

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

Abstract

Study of the emission behavior of organometal halide perovskites CH3NH ₃ PbBr ₃ as function of excitation intensity by using photoluminescence (PL) and time-resolved photoluminescence (TRPL) techniques reveals the photo-activated mobile ion can evidently impact carrier dynamics in the minutes time scale. We observe that PL intensity and PL decay exhibit excitation intensity dependent reductions in the minute time scale under continuous excitation at constant intensity. It has been confirmed that the carrier recombination intimately related to the density of photoexcited carriers. However, this long response time suggests photo-activated ion migration, rather than photo-generated electrons and holes, are responsible for the observed change in carrier dynamics. The observations provide insight into the nonradiative behavior of perovskite material under illumination. Because free carrier recombination process is linked to charge separation/ transportation efficiency, these key findings are useful for understanding of instability of perovskite solar cells.

Original language	English
Title of host publication	2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC)
Place of Publication	Piscataway, NJ
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	756-759
Number of pages	4
ISBN (Electronic)	9781509027248
ISBN (Print)	9781509027255
DOIs	https://doi.org/10.1109/PVSC.2016.7749704
Publication status	Published - 2016
Externally published	Yes
Event	43rd IEEE Photovoltaic Specialists Conference, PVSC 2016 - Portland, United States Duration: 5 Jun 2016 → 10 Jun 2016

Conference

Conference	43rd IEEE Photovoltaic Specialists Conference, PVSC 2016
Country/Territory	United States
City	Portland
Period	5/06/16 → 10/06/16

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10.1109/PVSC.2016.7749704

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title = "Unravelling the mechanism of photo-activated ion dynamics in organic-inorganic perovskites",

abstract = " Study of the emission behavior of organometal halide perovskites CH3NH 3 PbBr 3 as function of excitation intensity by using photoluminescence (PL) and time-resolved photoluminescence (TRPL) techniques reveals the photo-activated mobile ion can evidently impact carrier dynamics in the minutes time scale. We observe that PL intensity and PL decay exhibit excitation intensity dependent reductions in the minute time scale under continuous excitation at constant intensity. It has been confirmed that the carrier recombination intimately related to the density of photoexcited carriers. However, this long response time suggests photo-activated ion migration, rather than photo-generated electrons and holes, are responsible for the observed change in carrier dynamics. The observations provide insight into the nonradiative behavior of perovskite material under illumination. Because free carrier recombination process is linked to charge separation/ transportation efficiency, these key findings are useful for understanding of instability of perovskite solar cells. ",

author = "Sheng Chen and Xiaoming Wen and Rui Sheng and Shujuan Huang and Green, {Martin A.} and Anita Ho-Baillie",

year = "2016",

doi = "10.1109/PVSC.2016.7749704",

language = "English",

isbn = "9781509027255",

pages = "756--759",

booktitle = "2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC)",

publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

address = "United States",

note = "43rd IEEE Photovoltaic Specialists Conference, PVSC 2016 ; Conference date: 05-06-2016 Through 10-06-2016",

}

Chen, S, Wen, X, Sheng, R, Huang, S, Green, MA & Ho-Baillie, A 2016, Unravelling the mechanism of photo-activated ion dynamics in organic-inorganic perovskites. in 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC). Institute of Electrical and Electronics Engineers (IEEE), Piscataway, NJ, pp. 756-759, 43rd IEEE Photovoltaic Specialists Conference, PVSC 2016, Portland, United States, 5/06/16. https://doi.org/10.1109/PVSC.2016.7749704

Unravelling the mechanism of photo-activated ion dynamics in organic-inorganic perovskites. / Chen, Sheng; Wen, Xiaoming; Sheng, Rui; Huang, Shujuan; Green, Martin A.; Ho-Baillie, Anita.

2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC). Piscataway, NJ : Institute of Electrical and Electronics Engineers (IEEE), 2016. p. 756-759.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

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AU - Ho-Baillie, Anita

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Unravelling the mechanism of photo-activated ion dynamics in organic-inorganic perovskites

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