Peng Cheng-Hsiung, Hwang Chyi-Ching
Department of Chemical and Materials Engineering, Minghsin University of Science and Technology, Hsinfeng, Hsinchu 304, Taiwan.
Weapon System Center, Chung Cheng Institute of Technology, NDU, Daxi, Taoyuan 335, Taiwan.
ScientificWorldJournal. 2013 Dec 17;2013:798713. doi: 10.1155/2013/798713. eCollection 2013.
In this study, a novel method was proposed to synthesize high quality Zn-doped CuInS₂ nanocrystals under high frequency magnetic field at ambient conditions. The magnetic Zn-doping gave superparamagnetic heating of the resulting nanocrystals via magnetic induction, causing an accelerating growth rate of the doped CuInS₂ under ambient conditions faster than conventional autoclave synthesis. Shape evolution of the Zn-doped CuInS₂ nanocrystals from initially spherical to pyramidal, to cubic, and finally to a bar geometry was detected as a function of time of exposure to magnetic induction. These colloidal solvents with different shaped nanocrystals were further used as "nanoink" to fabricate a simple thin film solar device; the best efficiency we obtained of these crystals was 1.01% with a 1.012 μm thickness absorber layer (bar geometry). The efficiency could be promoted to 1.44% after the absorber was thickened to 2.132 μm.
在本研究中，提出了一种在环境条件下于高频磁场中合成高质量锌掺杂硫化铜铟（Zn - doped CuInS₂）纳米晶体的新方法。磁性锌掺杂通过磁感应使所得纳米晶体产生超顺磁性加热，导致在环境条件下掺杂的CuInS₂的生长速率比传统高压釜合成更快。随着暴露于磁感应时间的变化，检测到锌掺杂的CuInS₂纳米晶体的形状从最初的球形演变为金字塔形、立方体，最终变为棒状几何形状。这些具有不同形状纳米晶体的胶体溶剂进一步用作“纳米墨水”来制造简单的薄膜太阳能器件；我们用这些晶体获得的最佳效率为1.01%，吸收层厚度为1.012μm（棒状几何形状）。当吸收层增厚到2.132μm后，效率可提高到1.44%。
