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Highly Luminescent Phase-Stable CsPbI3 Perovskite Quantum Dots Achieving Near 100% Absolute Photoluminescence Quantum Yield

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Liu, Feng, Zhang, Yaohong, Ding, Chao, Kobayashi, Syuusuke, Izuishi, Takuya, Nakazawa, Naoki, Toyoda, Taro, Ohta, Tsuyoshi, Hayase, Shuzi, Minemoto, Takashi, Yoshino, Kenji, Dai, Songyuan, Shen, Qing·2017·ACS Nano

DOI 10.1021/acsnano.7b05442

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Abstract

Perovskite quantum dots (QDs) as a new type of colloidal nanocrystals have gained significant attention for both fundamental research and commercial applications owing to their appealing optoelectronic properties and excellent chemical processability. For their wide range of potential applications, synthesizing colloidal QDs with high crystal quality is of crucial importance. However, like most common QD systems such as CdSe and PbS, those reported perovskite QDs still suffer from a certain density of trapping defects, giving rise to detrimental nonradiative recombination centers and thus quenching luminescence. In this paper, we show that a high room-temperature photoluminescence quantum yield of up to 100% can be obtained in CsPbI 3 perovskite QDs, signifying the achievement of almost complete elimination of the trapping defects. This is realized with our improved synthetic protocol that involves introducing organolead compound trioctylphosphine–PbI 2 (TOP–PbI 2 ) as the reactive precursor, which also leads to a significantly improved stability for the resulting CsPbI 3 QD solutions. Ultrafast kinetic analysis with time-resolved transient absorption spectroscopy evidence the negligible electron or hole-trapping pathways in our QDs, which explains such a high quantum efficiency. We expect the successful synthesis of the “ideal” perovskite QDs will exert profound influence on their applications to both QD-based light-harvesting and -emitting devices.

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See all 960

Authors: Liu, F., Zhang, Y., Ding, C., Kobayashi, S., Izuishi, T., Nakazawa, N., Toyoda, T., Ohta, T., Hayase, S., Minemoto, T., Yoshino, K., Dai, S., & Shen, Q.
Venue: ACS Nano
Publisher: American Chemical Society (ACS)
Published: 2017-09-19
Volume: 11
Issue: 10
Pages: 10373-10383
ISSN: 1936-0851 (ISSN-L)
1936-086X
DOI: 10.1021/acsnano.7b05442
OpenAlex: W2755837005
Cited by: 960
References: 74
FWCI: 39.05
Type: journal article
Language: en
Open access: green

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Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

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Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.

Highly Luminescent Phase-Stable CsPbI3 Perovskite Quantum Dots Achieving Near 100% Absolute Photoluminescence Quantum Yield

Abstract

Overview

Integrity signals

Verification

Claims the paper makes

Self-check

Citations

Cites

Cited by

Metadata

Record

About these checks

Data sources