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Localized surface plasmon-enhanced green quantum dot light-emitting diodes using gold nanoparticles

机译:使用金纳米粒子的局部表面等离子体增强的绿色量子点发光二极管

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We develop a localized surface plasmon (LSP)-enhanced CdSe/ZnS green quantum dot (QD) light-emitting diode (LED) containing Au nanoparticles (NPs) embedded in a ZnO electron transport layer. Au NPs blended in ZnO solution are directly spin coated onto the QD emissive layer to provide strong coupling between LSPs in Au NPs and excitons in QDs, greatly enhancing the electroluminescence (EL). Photoluminescence (PL) and EL intensities are greatly enhanced by 4.12 and 4.33-fold, respectively. Maximum PL and EL enhancement ratios of 4.47 and 4.54 are observed at 535 and 532 nm, respectively, and these are similar to the LSP resonance wavelength of 536 nm for Au NPs in ZnO films. The results indicate that the EL enhancement of the QD-LED is attributed to strong resonance coupling between excitons in the QDs and LSPs in the Au NPs in ZnO films.
机译:我们开发了一种局部表面等离子体(LSP)增强的CdSe / ZnS绿色量子点(QD)发光二极管(LED),该发光二极管包含嵌入ZnO电子传输层中的Au纳米颗粒(NPs)。将掺入ZnO溶液中的Au NP直接旋涂到QD发射层上,以提供Au NP中的LSP与QD中的激子之间的强耦合,从而大大增强了电致发光(EL)。光致发光(PL)和EL强度分别大大提高了4.12倍和4.33倍。分别在535和532 nm处观察到最大PL和EL增强比分别为4.47和4.54,这与ZnO薄膜中Au NP的LSP共振波长为536 nm相似。结果表明,QD-LED的EL增强归因于QDs中的激子与ZnO薄膜中Au NPs中的LSP之间的强共振耦合。

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