This paper report on the significantly improved performance of InP/ZnSeS/ZnS quantum dot (QD) devices with multi-functional ligands. These quantum dots in which the monodentate ligand oleylamine is coordinated to the shell surface are reacted with the delocalized bipyridine bidentate ligand, where some oleylamine is replaced by bipyridine. The coordination of the delocalized bidentate bipyridine ligand results in many electronic property changes in the QD-LED (light emitting diode) device. 1 H-NMR (nuclear magnetic resonance) and TGA (thermogravimetric analysis) data indicated that up to 60.6% of the native ligands were partially exchanged with the bipyridine lig-ands. Photoluminescence (PL) spectra before and after ligand substitution show a bathochromic shift of about 2.6 nm due to the electrical resonant properties of the bipyridine ligands. QD-LED devices were fabricated using QDs with substituted bipyridine ligand, and significant improvements in the device properties were observed. Here, we first report the ligand dependence of the photo-and the electroluminescence of green InP/ZnSeS/ZnS quantum dots in QD-LED devices.

中文翻译：

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使用多功能联吡啶配体提高量子点发光器件效率

本文报告了具有多功能配体的 InP/ZnSeS/ZnS 量子点 (QD) 器件的性能显着提高。这些单齿配体油胺与壳表面配位的量子点与离域联吡啶二齿配体反应，其中一些油胺被联吡啶取代。离域双齿联吡啶配体的配位导致 QD-LED（发光二极管）器件的许多电子特性发生变化。1 H-NMR（核磁共振）和TGA（热重分析）数据表明高达60.6%的天然配体与联吡啶配体部分交换。由于联吡啶配体的电共振特性，配体取代前后的光致发光 (PL) 光谱显示约 2.6 nm 的红移。QD-LED 器件是使用具有取代联吡啶配体的 QD 制造的，并且观察到器件性能的显着改善。在这里，我们首先报告了 QD-LED 器件中绿色 InP/ZnSeS/ZnS 量子点的光和电致发光的配体依赖性。