White Fluorescent Organic Light-Emitting Diodes with 100% Power Conversion
Energy-efficient lighting sources are desired to provide another solution of carbon emission reduction. White organic light-emitting diodes are promising, because of theoretical internal quantum efficiencies for 100% electric-to-light conversion. However, pure organic fluorescent materials still fac...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Association for the Advancement of Science (AAAS)
2022-01-01
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| Series: | Research |
| Online Access: | https://spj.science.org/doi/10.34133/research.0009 |
| _version_ | 1797283338271064064 |
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| author | Dongxue Ding Zicheng Wang Chunbo Duan Chunmiao Han Jing Zhang Shuo Chen Ying Wei Hui Xu |
| author_facet | Dongxue Ding Zicheng Wang Chunbo Duan Chunmiao Han Jing Zhang Shuo Chen Ying Wei Hui Xu |
| author_sort | Dongxue Ding |
| collection | DOAJ |
| description | Energy-efficient lighting sources are desired to provide another solution of carbon emission reduction. White organic light-emitting diodes are promising, because of theoretical internal quantum efficiencies for 100% electric-to-light conversion. However, pure organic fluorescent materials still face a challenge in harvesting triplet excitons for radiation. Herein, we report a white fluorescent organic light-emitting diode having an external quantum efficiency of 30.7% and a power efficiency of 120.2 lm W−1. In the single emissive layers, we use blue thermally activated delayed fluorescent emitters to sensitize a yellow fluorescent emitter. Transient photoluminescence and electroluminescence analyses suggest that a blue thermally activated delayed fluorescent molecule with ~100% reverse intersystem crossing efficiency and negligible triplet nonradiative rate constant completely converts triplet to singlet, suppressing triplet quenching by a yellow fluorescent emitter and ensuring 100% power conversion. |
| first_indexed | 2024-03-07T17:29:39Z |
| format | Article |
| id | doaj.art-f1f0285e5be5492d998c827bb073e525 |
| institution | Directory Open Access Journal |
| issn | 2639-5274 |
| language | English |
| last_indexed | 2024-03-07T17:29:39Z |
| publishDate | 2022-01-01 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | Article |
| series | Research |
| spelling | doaj.art-f1f0285e5be5492d998c827bb073e5252024-03-02T18:20:57ZengAmerican Association for the Advancement of Science (AAAS)Research2639-52742022-01-01202210.34133/research.0009White Fluorescent Organic Light-Emitting Diodes with 100% Power ConversionDongxue Ding0Zicheng Wang1Chunbo Duan2Chunmiao Han3Jing Zhang4Shuo Chen5Ying Wei6Hui Xu7Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, Heilongjiang, China.Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, Heilongjiang, China.Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, Heilongjiang, China.Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, Heilongjiang, China.Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, Heilongjiang, China.Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, Heilongjiang, China.Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, Heilongjiang, China.Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, Heilongjiang, China.Energy-efficient lighting sources are desired to provide another solution of carbon emission reduction. White organic light-emitting diodes are promising, because of theoretical internal quantum efficiencies for 100% electric-to-light conversion. However, pure organic fluorescent materials still face a challenge in harvesting triplet excitons for radiation. Herein, we report a white fluorescent organic light-emitting diode having an external quantum efficiency of 30.7% and a power efficiency of 120.2 lm W−1. In the single emissive layers, we use blue thermally activated delayed fluorescent emitters to sensitize a yellow fluorescent emitter. Transient photoluminescence and electroluminescence analyses suggest that a blue thermally activated delayed fluorescent molecule with ~100% reverse intersystem crossing efficiency and negligible triplet nonradiative rate constant completely converts triplet to singlet, suppressing triplet quenching by a yellow fluorescent emitter and ensuring 100% power conversion.https://spj.science.org/doi/10.34133/research.0009 |
| spellingShingle | Dongxue Ding Zicheng Wang Chunbo Duan Chunmiao Han Jing Zhang Shuo Chen Ying Wei Hui Xu White Fluorescent Organic Light-Emitting Diodes with 100% Power Conversion Research |
| title | White Fluorescent Organic Light-Emitting Diodes with 100% Power Conversion |
| title_full | White Fluorescent Organic Light-Emitting Diodes with 100% Power Conversion |
| title_fullStr | White Fluorescent Organic Light-Emitting Diodes with 100% Power Conversion |
| title_full_unstemmed | White Fluorescent Organic Light-Emitting Diodes with 100% Power Conversion |
| title_short | White Fluorescent Organic Light-Emitting Diodes with 100% Power Conversion |
| title_sort | white fluorescent organic light emitting diodes with 100 power conversion |
| url | https://spj.science.org/doi/10.34133/research.0009 |
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