WACKER-Lehrstuhl für Makromolekulare Chemie, Technische Universität München, Lichtenbergstraße 4, 85747, Catalysis Research Center, Ernst-Otto-Fischer-Straße 1, 85748 Garching, Germany.
Nanoscale. 2018 Jun 7;10(22):10337-10342. doi: 10.1039/c7nr09525b.
The influence of silicon nanocrystal (SiNC) surface characteristics obtained from different functionalization methods on the performance of LEDs was investigated. The surface of SiNCs was functionalized with hexyl chains via hydrosilylation (HS) or with organolithium reagents (OLR) and resulting SiNCs were incorporated as the emissive layer in hybrid organic/inorganic LEDs. Devices utilizing SiNCs functionalized with OLR consistently exhibited lower turn-on voltages, higher luminances and external quantum efficiencies compared to those obtained from the HS method. These improvements were attributed to the less dense and monolayer surface coverage of the SiNCs obtained by the OLR method, as well as their higher absolute quantum yield.
研究了通过不同功能化方法获得的硅纳米晶体（SiNC）表面特性对 LED 性能的影响。通过硅氢加成（HS）或有机锂试剂（OLR）将 SiNC 的表面功能化，得到的 SiNC 被掺入作为混合有机/无机 LED 的发射层。与通过 HS 方法获得的 SiNC 相比，用 OLR 功能化的 SiNC 的器件始终表现出更低的开启电压、更高的亮度和外量子效率。这些改进归因于 OLR 方法获得的 SiNC 具有较少的致密和单层表面覆盖率，以及它们更高的绝对量子产率。
