Enhanced Electroluminescence from a Thiophene-Based Insulated Molecular Wire
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- 作者：Gábor Méhes ; Chengjun Pan ; Fatima Bencheikh ; Li Zhao ; Kazunori Sugiyasu ; Masayuki Takeuchi ; Jean-Charles Ribierre ; Chihaya Adachi
- 刊名：ACS Macro Letters
- 出版年：2016
- 出版时间：July 19, 2016
- 年：2016
- 卷：5
- 期：7
- 页码：781-785
- 全文大小：334K
- 年卷期：0
- ISSN：2161-1653
文摘
We report on the realization of polymer light-emitting diodes (PLEDs) based on fluorescent polythiophene (PT)-based insulated molecular wires (IMWs). PLEDs using PT emitting layers traditionally have low external quantum efficiencies (ηb>eqe b>) below 0.1%. Moreover, IMWs lack a thorough exploitation for electroluminescent applications due to concerns about reduced charge transport between their chains. We constructed multilayer PLEDs containing PT IMW emitting layers that show the maximum ηb>eqe b> close to 1.4%, luminance at 3700 cd/m2, and low turn on voltage at 2.5 V. We also show a strong influence of the thickness of electron transport layer on ηb>eqe b> through device optimization and optical simulations.