File Download
There are no files associated with this item.
Supplementary
-
Citations:
- Appears in Collections:
Conference Paper: Realization of Thermally Stimulated Delayed Phosphorescence in Arylgold(III) Complexes and Efficient Gold(III) Based Blue-Emitting Organic Light-Emitting Devices
Title | Realization of Thermally Stimulated Delayed Phosphorescence in Arylgold(III) Complexes and Efficient Gold(III) Based Blue-Emitting Organic Light-Emitting Devices |
---|---|
Authors | |
Issue Date | 2019 |
Publisher | The Chinese University of Hong Kong. |
Citation | The 26th Symposium on Chemistry Postgraduate Research in Hong Kong, The Chinese University of Hong Kong, Hong Kong, 4 May 2019, p. INORG-49 How to Cite? |
Abstract | To address and overcome the difficulties associated with the increased reactivity and susceptibility of blue emitters to deactivation pathways arising from the high-lying triplet excited states, we have successfully demonstrated an innovative strategy of harvesting triplet emission via the “thermally stimulated delayed phosphorescence” mechanism, where thermal up-conversion of excitons from the lower-energy triplet excited states (T1) to higher-energy triplet excited states (T1′) are observed to generate blue emission. The lower-lying T1 excited state could serve as a mediator to populate the emissive T1′ state by up-conversion via reverse internal conversion, which could enhance the
photoluminescence quantum yield by over 20-folds. Organic light-emitting devices with respectable external quantum efficiencies of up to 7.7 % and sky-blue emission with CIE coordinates of (0.17, 0.37) have been realized. The operational stability for the device based on complex 1 has also been explored, and the device is found to show fairly respectable lifetime. This work opens up a new avenue to the design and synthesis of blue phosphorescent emitters.
References: 1. M.-C. Tang, M.-Y. Leung, S.-L. Lai, M. Mg, M.-Y. Chan, V. W.-W. Yam, J. Am.
Chem. Soc., 2018, 140, 13115.
†M.-C.T. and M.-Y.L. contributed equally to this work. |
Description | Organizer: Department of Chemistry, The Chinese University of Hong Kong |
Persistent Identifier | http://hdl.handle.net/10722/275225 |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Tang, MC | - |
dc.contributor.author | Leung, MY | - |
dc.contributor.author | Lai, SL | - |
dc.contributor.author | Ng, M | - |
dc.contributor.author | Chan, MMY | - |
dc.contributor.author | Yam, VWW | - |
dc.date.accessioned | 2019-09-10T02:38:11Z | - |
dc.date.available | 2019-09-10T02:38:11Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | The 26th Symposium on Chemistry Postgraduate Research in Hong Kong, The Chinese University of Hong Kong, Hong Kong, 4 May 2019, p. INORG-49 | - |
dc.identifier.uri | http://hdl.handle.net/10722/275225 | - |
dc.description | Organizer: Department of Chemistry, The Chinese University of Hong Kong | - |
dc.description.abstract | To address and overcome the difficulties associated with the increased reactivity and susceptibility of blue emitters to deactivation pathways arising from the high-lying triplet excited states, we have successfully demonstrated an innovative strategy of harvesting triplet emission via the “thermally stimulated delayed phosphorescence” mechanism, where thermal up-conversion of excitons from the lower-energy triplet excited states (T1) to higher-energy triplet excited states (T1′) are observed to generate blue emission. The lower-lying T1 excited state could serve as a mediator to populate the emissive T1′ state by up-conversion via reverse internal conversion, which could enhance the photoluminescence quantum yield by over 20-folds. Organic light-emitting devices with respectable external quantum efficiencies of up to 7.7 % and sky-blue emission with CIE coordinates of (0.17, 0.37) have been realized. The operational stability for the device based on complex 1 has also been explored, and the device is found to show fairly respectable lifetime. This work opens up a new avenue to the design and synthesis of blue phosphorescent emitters. References: 1. M.-C. Tang, M.-Y. Leung, S.-L. Lai, M. Mg, M.-Y. Chan, V. W.-W. Yam, J. Am. Chem. Soc., 2018, 140, 13115. †M.-C.T. and M.-Y.L. contributed equally to this work. | - |
dc.language | eng | - |
dc.publisher | The Chinese University of Hong Kong. | - |
dc.relation.ispartof | The 26th Symposium on Chemistry Postgraduate Research in Hong Kong, 2019 | - |
dc.title | Realization of Thermally Stimulated Delayed Phosphorescence in Arylgold(III) Complexes and Efficient Gold(III) Based Blue-Emitting Organic Light-Emitting Devices | - |
dc.type | Conference_Paper | - |
dc.identifier.email | Tang, MC: kobetang@hku.hk | - |
dc.identifier.email | Leung, MY: mingyi@hku.hk | - |
dc.identifier.email | Lai, SL: slllai@hku.hk | - |
dc.identifier.email | Ng, M: mkyng@HKUCC-COM.hku.hk | - |
dc.identifier.email | Chan, MMY: chanmym@hku.hk | - |
dc.identifier.email | Yam, VWW: wwyam@hku.hk | - |
dc.identifier.authority | Chan, MMY=rp00666 | - |
dc.identifier.authority | Yam, VWW=rp00822 | - |
dc.identifier.hkuros | 304934 | - |
dc.identifier.spage | INORG-49 | - |
dc.identifier.epage | INORG-49 | - |
dc.publisher.place | Hong Kong | - |