Ramasamy Parthiban, Kim Jinkwon
Department of Chemistry and GETRC, Kongju National University, 182, Shinkwon, Kongju, 314-701, Chungnam, Republic of Korea.
Chem Asian J. 2015 Jul;10(7):1468-73. doi: 10.1002/asia.201500199. Epub 2015 May 26.
The first colloidal synthesis of Cu2 GeS3 (CGS) nanocrystals with a thermodynamically metastable wurtzite crystal phase is reported. As a benefit of the sulfur precursors used in the synthesis, the shape of the as-synthesized wurtzite CGS nanocrystals can be controlled in the form of spherical nanoparticles, nanorectangles, and hollow nanorectangles. A detailed investigation into the effects of reaction conditions necessary to obtain phase-pure wurtzite CGS nanocrystals is presented. The choice of sulfur precursor and precursor injection temperature play a significant role in determining the crystal phase of the CGS nanocrystals. The band gap of the new wurtzite phase CGS was measured to be 1.76 eV and the CGS nanocrystals exhibited a good electrochemical photoresponse, which was indicative of their potential application as an active layer in the field of solar cells.
首次报道了具有热力学亚稳纤锌矿晶相的Cu2GeS3（CGS）纳米晶体的胶体合成。作为合成中使用的硫前驱体的一个优点，所合成的纤锌矿CGS纳米晶体的形状可以控制为球形纳米颗粒、纳米矩形和中空纳米矩形的形式。本文详细研究了获得纯相纤锌矿CGS纳米晶体所需的反应条件的影响。硫前驱体的选择和前驱体注入温度在确定CGS纳米晶体的晶相中起着重要作用。测量了新型纤锌矿相CGS的带隙为1.76 eV，并且CGS纳米晶体表现出良好的电化学光响应，这表明它们作为太阳能电池领域的活性层具有潜在应用价值。
