Please use this identifier to cite or link to this item: https://doi.org/10.1021/acsmaterialslett.1c00138
Title: Revisiting Carbazole: Origin, Impurity, and Properties
Authors: Chen, Chengjian 
Chong, Kok Chan 
Pan, Yutong 
Qi, Guobin 
Xu, Shidang 
Liu, Bin 
Keywords: Science & Technology
Technology
Materials Science, Multidisciplinary
Materials Science
TEMPERATURE PHOSPHORESCENCE
DELAYED FLUORESCENCE
CYCLIZATION
LUMINOGENS
ARYLATION
Issue Date: 21-Jun-2021
Publisher: AMER CHEMICAL SOC
Citation: Chen, Chengjian, Chong, Kok Chan, Pan, Yutong, Qi, Guobin, Xu, Shidang, Liu, Bin (2021-06-21). Revisiting Carbazole: Origin, Impurity, and Properties. ACS MATERIALS LETTERS 3 (7) : 1081-1087. ScholarBank@NUS Repository. https://doi.org/10.1021/acsmaterialslett.1c00138
Abstract: Photoluminescence quantum yield (PLQY) is one of the most important characteristics for organic luminescent materials. However, when carbazole prepared from the lab was compared to that from a commercial source, a remarkable change of PLQY was observed to vary from 37.1% to 69.8%. Taking 9-(4-bromobenzyl)-9H-carbazole (CzBBr) as an example of carbazole derivatives, the PLQYs of CzBBr synthesized from different origins of carbazole were varied from 16.0% to 91.1%. Our studies demonstrated that efficient radiative transition pathways were activated for commercial carbazole based luminescence, leading to a large enhancement in PLQY with fluorescence (from 16.0% to 54.4%) and phosphorescence (from <1% to 36.7%) for CzBBr. These results suggest that the origin of carbazole plays a very important role in determining the optical properties of carbazole derivatives, alerting us to carefully revisit carbazole and its derivatives, especially those with record-high efficiency.
Source Title: ACS MATERIALS LETTERS
URI: https://scholarbank.nus.edu.sg/handle/10635/215477
ISSN: 2639-4979,
DOI: 10.1021/acsmaterialslett.1c00138
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