Photo-stability of CsPbBr3 perovskite quantum dots for optoelectronic application

Junsheng Chen; Dongzhou Liu; Mohammed J. Al-Marri; Lauri Nuuttila; Heli Lehtivuori; Kaibo Zheng

doi:10.1007/s40843-016-5123-1

Photo-stability of CsPbBr3 perovskite quantum dots for optoelectronic application

Junsheng Chen, Dongzhou Liu, Mohammed J. Al-Marri, Lauri Nuuttila, Heli Lehtivuori, Kaibo Zheng

Biophysics Photosynthesis/Energy

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

Due to their superior photoluminescence (PL) quantum yield (QY) and tunable optical band gap, all-inorganic CsPbBr3 perovskite quantum dots (QDs) have attracted intensive attention for the application in solar cells, light emitting diodes (LED), photodetectors and laser devices. In this scenario, the stability of such materials becomes a critical factor to be revealed. We hereby investigated the long-termstability of as-synthesized CsPbBr3 QDs suspended in toluene at various environmental conditions. We found light illumination would induce drastic photo-degradation of CsPbBr3QDs. The steady-state spectroscopy, transmission electron microscopy (TEM), and X-ray diffraction (XRD) verified that CsPbBr3 QDs tend to aggregate to form larger particles under continuous light soaking. In addition, decreasing PL QY of the QDs during light soaking indicates the formation of trap sites. Our work reveals that the main origin of instability in CsPbBr3 QDs and provides reference to engineer such QDs towards optimal device application.

Original language	English
Pages (from-to)	719-727
Number of pages	9
Journal	SCIENCE CHINA-MATERIALS
Volume	59
Issue number	9
DOIs	https://doi.org/10.1007/s40843-016-5123-1
Publication status	Published - Sept 2016

Keywords

perovskite
quantum dots
photo-stability

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s40843-016-5123-1

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@article{b95093ba27774dbe89466dcd0c0f123e,

title = "Photo-stability of CsPbBr3 perovskite quantum dots for optoelectronic application",

abstract = "Due to their superior photoluminescence (PL) quantum yield (QY) and tunable optical band gap, all-inorganic CsPbBr3 perovskite quantum dots (QDs) have attracted intensive attention for the application in solar cells, light emitting diodes (LED), photodetectors and laser devices. In this scenario, the stability of such materials becomes a critical factor to be revealed. We hereby investigated the long-termstability of as-synthesized CsPbBr3 QDs suspended in toluene at various environmental conditions. We found light illumination would induce drastic photo-degradation of CsPbBr3QDs. The steady-state spectroscopy, transmission electron microscopy (TEM), and X-ray diffraction (XRD) verified that CsPbBr3 QDs tend to aggregate to form larger particles under continuous light soaking. In addition, decreasing PL QY of the QDs during light soaking indicates the formation of trap sites. Our work reveals that the main origin of instability in CsPbBr3 QDs and provides reference to engineer such QDs towards optimal device application.",

keywords = "perovskite, quantum dots, photo-stability",

author = "Junsheng Chen and Dongzhou Liu and Al-Marri, {Mohammed J.} and Lauri Nuuttila and Heli Lehtivuori and Kaibo Zheng",

year = "2016",

month = sep,

doi = "10.1007/s40843-016-5123-1",

language = "English",

volume = "59",

pages = "719--727",

journal = "SCIENCE CHINA-MATERIALS",

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TY - JOUR

T1 - Photo-stability of CsPbBr3 perovskite quantum dots for optoelectronic application

AU - Chen, Junsheng

AU - Liu, Dongzhou

AU - Al-Marri, Mohammed J.

AU - Nuuttila, Lauri

AU - Lehtivuori, Heli

AU - Zheng, Kaibo

PY - 2016/9

Y1 - 2016/9

N2 - Due to their superior photoluminescence (PL) quantum yield (QY) and tunable optical band gap, all-inorganic CsPbBr3 perovskite quantum dots (QDs) have attracted intensive attention for the application in solar cells, light emitting diodes (LED), photodetectors and laser devices. In this scenario, the stability of such materials becomes a critical factor to be revealed. We hereby investigated the long-termstability of as-synthesized CsPbBr3 QDs suspended in toluene at various environmental conditions. We found light illumination would induce drastic photo-degradation of CsPbBr3QDs. The steady-state spectroscopy, transmission electron microscopy (TEM), and X-ray diffraction (XRD) verified that CsPbBr3 QDs tend to aggregate to form larger particles under continuous light soaking. In addition, decreasing PL QY of the QDs during light soaking indicates the formation of trap sites. Our work reveals that the main origin of instability in CsPbBr3 QDs and provides reference to engineer such QDs towards optimal device application.

AB - Due to their superior photoluminescence (PL) quantum yield (QY) and tunable optical band gap, all-inorganic CsPbBr3 perovskite quantum dots (QDs) have attracted intensive attention for the application in solar cells, light emitting diodes (LED), photodetectors and laser devices. In this scenario, the stability of such materials becomes a critical factor to be revealed. We hereby investigated the long-termstability of as-synthesized CsPbBr3 QDs suspended in toluene at various environmental conditions. We found light illumination would induce drastic photo-degradation of CsPbBr3QDs. The steady-state spectroscopy, transmission electron microscopy (TEM), and X-ray diffraction (XRD) verified that CsPbBr3 QDs tend to aggregate to form larger particles under continuous light soaking. In addition, decreasing PL QY of the QDs during light soaking indicates the formation of trap sites. Our work reveals that the main origin of instability in CsPbBr3 QDs and provides reference to engineer such QDs towards optimal device application.

KW - perovskite

KW - quantum dots

KW - photo-stability

U2 - 10.1007/s40843-016-5123-1

DO - 10.1007/s40843-016-5123-1

M3 - Article

SN - 2095-8226

VL - 59

SP - 719

EP - 727

JO - SCIENCE CHINA-MATERIALS

JF - SCIENCE CHINA-MATERIALS

IS - 9

ER -

Photo-stability of CsPbBr3 perovskite quantum dots for optoelectronic application

Abstract

Keywords

UN SDGs

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