Under different reaction temperature and reaction time, we studied the influence of PbO and Pb( Ac) 2 as lead sources on the growth of PbSe nanocrystals, respectively. Experimental results indicated that when we used PbO as a lead source, OA as the ligand, monodispersed spherical and truncated octahedral PbSe nanocrystals could be obtained at different reaction temperatures. In contrast, when we used Pb( Ac) 2 as the lead source, PbSe nanoflowers and nanostars could be obtained at different reaction temperatures. Different PbSe morphologies could be obtained when we chose different lead sources, which was attributed to different steric hindrance caused by different lengths of capping ligands. However, upon going through a high reaction temperature and a long reaction time, all these diverse morphologies of PbSe nanocrystals could evolve into cubic-like nanocrystals, which is determined by the crystal habit of PbSe.%采用有机相合成法，分别以PbO和醋酸铅[Pb(Ac)2]作为铅源，研究了在不同反应温度和反应时间下，不同铅源对PbSe纳米晶生长的影响。实验结果表明，以PbO作为铅源，油酸( OA)作为配体时，在不同的反应温度下得到了球形PbSe纳米晶和截角八面体PbSe纳米晶；选择Pb(Ac)2作为铅源时，在不同的温度下得到了PbSe纳米花和PbSe纳米星。选择不同铅源得到的PbSe纳米晶形貌完全不同，这主要是由于醋酸根的引入产生了不同的空间位阻，引起纳米晶导向吸附并形成纳米花。而随着反应温度的升高和反应时间的延长，这些不同形貌的PbSe纳米晶最终会演变成纳米立方块，这主要是由PbSe的晶体特性决定的。
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