Narayanaswamy Arun, Feiner L F, Meijerink A, van der Zaag P J
Philips Research Laboratories, Prof. Holstlaan 4, 5656 AE Eindhoven, The Netherlands.
ACS Nano. 2009 Sep 22;3(9):2539-46. doi: 10.1021/nn9004507.
Visual color changes between 300 and 510 K were observed in the photoluminescence (PL) of colloidal InP/ZnS core-shell nanocrystals. A subsequent study of PL spectra in the range 2-510 K and fitting the temperature dependent line shift and line width to theoretical models show that the dominant (dephasing) interaction is due to scattering by acoustic phonons of about 23 meV. Low temperature photoluminescence excitation measurements show that the excitonic band gap depends approximately inversely linearly on the quantum dot size d, which is distinctly weaker than the dependence predicted by current theories.
在胶体InP/ZnS核壳纳米晶体的光致发光（PL）中观察到300至510 K之间的视觉颜色变化。随后对2至510 K范围内的PL光谱进行研究，并将温度依赖的线移和线宽与理论模型拟合，结果表明主要的（退相）相互作用是由约23 meV的声学声子散射引起的。低温光致发光激发测量表明，激子带隙大约与量子点尺寸d成反比线性关系，这明显弱于当前理论预测的依赖性。
