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WENJIA LI1,* , LINA S1, JIAN REN1, JIAQI WU2
Organic light-emitting diodes based on Alq3 (8-hydroxyquinoline aluminum) were fabricated using C60 and C70 as cathode buffer layer, respectively. The results showed that EL performances of OLEDs using C70- buffer-layer were better than that of C60- buffer-layer. The mechanisms of enhancement were systemically discussed on the energy level difference of the heterojunction, conductivity of the materials and electron transport and quantum current distribution in the two kinds of fullerene molecules. The degradation of the two kinds of OLEDs exposed in air without encapsulation was also studied. It was found that OLEDs using C70 as cathode buffer layer showed a better stability. This is because C60 can be easily destroyed by oxygen than C70. Thus, C70 cathode buffer layer can not only increase the EL characteristics, but also dramatically improve the stability of OLEDs..
Organic light-emitting diodes, Cathode buffer layer, C 60 , C 70 , Degradation.
WENJIA LI, LINA S, JIAN REN, JIAQI WU, A comparative study on the performances of organic light-emitting diodes with C60 and C70 cathode buffer layer, Optoelectronics and Advanced Materials - Rapid Communications, 13, 3-4, March-April 2019, pp.195-201 (2019).
Submitted at: Aug. 21, 2018
Accepted at: April 8, 2019
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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