State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, People's Republic of China.
Material Sciences and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
Nanoscale Res Lett. 2014 Oct 2;9(1):549. doi: 10.1186/1556-276X-9-549. eCollection 2014.
Earth-abundant iron pyrite (FeS2) shows great potential as a light absorber for solar cells and photodetectors due to their high absorption coefficient (>10(5) cm(-1)). In this paper, high-quality phase-pure and single crystalline pyrite nanocrystals were synthesized via facile, low-cost, and environment friendly hydrothermal method. The molar ratio of sulphur to iron and the reaction time play a crucial role in determining the quality and morphology of FeS2 nanocrystals. X-ray diffraction and high-resolution transmission electron microscopy confirm that phase-pure and single crystalline pyrite nanocrystals can be synthesized with high sulphur to iron molar ratio and sufficient reaction time. For the first time, a crystalline nanogap pyrite photodetector with promising photocurrent and UV-visible photoresponse has been fabricated. This work further demonstrates a facile route to synthesize high-quality FeS2 nanomaterials and their potential in optoelectronic applications.
富含铁的黄铁矿（FeS2）由于其高吸收系数（>10(5) cm(-1)），在太阳能电池和光探测器中作为光吸收体具有巨大的潜力。在本文中，通过简便、低成本和环保的水热法合成了高质量的纯相和单晶黄铁矿纳米晶体。硫与铁的摩尔比和反应时间对 FeS2 纳米晶体的质量和形态起着至关重要的作用。X 射线衍射和高分辨率透射电子显微镜证实，高硫铁摩尔比和足够的反应时间可以合成纯相和单晶黄铁矿纳米晶体。首次制备了具有良好光电流和紫外可见光光响应的晶状纳米间隙黄铁矿光探测器。这项工作进一步证明了一种简便的合成高质量 FeS2 纳米材料的方法及其在光电应用中的潜力。
