Key factors of exciplex emission: Exciton binding and intermolecular molecular orbital overlap
| Autor: | Su Kyeong Shin, Sang Kyu Jeon, Chang Wook Han, Hyun-Chul Choi, Hong-Seok Choi, Han Yoon-Deok, Jun Yeob Lee |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Carbazole Exciton Intermolecular force Electron donor 02 engineering and technology General Chemistry Electron acceptor 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Acceptor 0104 chemical sciences Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound chemistry Chemical physics Materials Chemistry Molecular orbital Electrical and Electronic Engineering 0210 nano-technology HOMO/LUMO |
| Zdroj: | Organic Electronics. 63:283-288 |
| ISSN: | 1566-1199 |
| DOI: | 10.1016/j.orgel.2018.09.044 |
| Popis: | Key parameters of exciplex emission energy and efficiency were elucidated by synthesizing two electron donor type hosts derived from carbazole and diphenylamine. The two hosts were mixed with an electron acceptor type host to make exciplexes. Investigation of the exciplex emission characteristics revealed that the distance between the HOMO of the donor type host and the LUMO of the acceptor type host is critical to the emission energy and efficiency. The exciplex which has short intermolecular distance between HOMO and LUMO showed low emission energy and high device efficiency possibly due to strong exciton binding and extensive HOMO-LUMO overlap. Therefore, it was found that intermolecular HOMO and LUMO distance is also a key factor affecting the device performances of exciplexes. |
| Databáze: | OpenAIRE |
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