We explore the dynamics of blue emission from dodecylamine and ammonia functionalized silicon nanocrystals (Si NCs) with average diameters of ∼3 and ∼6 nm using time-resolved photoluminescence (TRPL) spectroscopy. The Si NCs exhibit nanosecond PL decay dynamics that is independent of NC size and uniform across the emission spectrum. The TRPL measurements reveal complete quenching of core state emission by a charge transfer state that is responsible for the blue PL with a radiative recombination rate of ∼5 × 10^7 s^(−1). A detailed picture of the charge transfer state emission dynamics in these functionalized Si NCs is proposed.
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机译：我们使用时间分辨光致发光（TRPL）光谱研究了平均直径约为3和6 nm的十二烷基胺和氨官能化硅纳米晶体（Si NCs）的蓝色发射动力学。 Si NCs具有纳秒级的PL衰减动力学，该动力学与NC尺寸无关，并且在整个发射光谱范围内均一。 TRPL测量表明，通过电荷转移态完全淬灭了核心态发射，该电荷转移态导致蓝色PL的辐射复合率为〜5×10 ^ 7 s ^（-1）。提出了这些功能化的Si NCs中电荷转移态发射动力学的详细描述。
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