Evidence map›Paper›PMID 34163913›Full record

ArticleChemical science2020

Using fluorene to lock electronically active moieties in thermally activated delayed fluorescence emitters for high-performance non-doped organic light-emitting diodes with suppressed roll-off.

Lin Wu, Kai Wang, Cheng Wang, Xiao-Chun Fan, Yi-Zhong Shi, Xiang Zhang, Shao-Li Zhang, Jun Ye, Cai-Jun Zheng, Yan-Qing Li and 3 more

Abstract read
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In one paragraph

Article in Chemical science, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

7 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors.

Lin WuInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University Suzhou Jiangsu 215123 P.R. China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn.
Kai WangInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University Suzhou Jiangsu 215123 P.R. China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn.ORCID https://orcid.org/0000-0002-9860-2282
Cheng WangInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University Suzhou Jiangsu 215123 P.R. China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn.
Xiao-Chun FanInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University Suzhou Jiangsu 215123 P.R. China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn.
Yi-Zhong ShiInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University Suzhou Jiangsu 215123 P.R. China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn.ORCID https://orcid.org/0000-0002-8397-9618
Xiang ZhangInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University Suzhou Jiangsu 215123 P.R. China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn.
Shao-Li ZhangInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University Suzhou Jiangsu 215123 P.R. China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn.
Jun YeSchool of Materials Science and Chemical Engineering, Ningbo University Ningbo Zhejiang 315211 P. R. China yejun@nbu.edu.cn.ORCID https://orcid.org/0000-0001-6245-1796
Cai-Jun ZhengSchool of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China Chengdu Sichuan 610054 P. R. China.ORCID https://orcid.org/0000-0002-4157-4313
Yan-Qing LiInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University Suzhou Jiangsu 215123 P.R. China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn.ORCID https://orcid.org/0000-0002-6813-0448
Jia YuInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University Suzhou Jiangsu 215123 P.R. China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn.
Xue-Mei OuInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University Suzhou Jiangsu 215123 P.R. China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn.
Xiao-Hong ZhangInstitute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University Suzhou Jiangsu 215123 P.R. China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn.ORCID https://orcid.org/0000-0002-6732-2499

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Thermally activated delayed fluorescence (TADF) emitters with aggregation-induced emission (AIE) features are hot candidates for non-doped organic light-emitting diodes (OLEDs), as they are highly emissive in solid states upon photoexcitation. Nevertheless, not every AIE-TADF emitter in the past had guaranteed decent efficiencies in non-doped devices, indicating that the AIE character alone does not necessarily afford ideal non-doped TADF emitters. As intermolecular electron-exchange interaction that involves long-lived triplet excitons plays a dominant role in the whole quenching process of TADF, we anticipate that it is the main reason for the different electroluminescence performances of AIE-TADF emitters. Therefore, in this work, we designed two TADF emitters SPBP-DPAC and SPBP-SPAC by modifying a reported less successful emitter BP-DPAC with extra fluorenes to increase intermolecular distances and attenuate this electron-exchange interaction. With the fluorene lock as steric hindrance, SPBP-DPAC and SPBP-SPAC exhibit significantly higher exciton utilization in non-doped films due to the suppressed concentration quenching. The non-doped OLEDs based on SPBP-DPAC and SPBP-SPAC show an excellent maximum external quantum efficiency (EQE) of 22.8% and 21.3% respectively, and what's even more promising is that ignorable roll-offs at practical brightness (

Identifiers

PMID34163913
PMCPMC8179127

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.