Effect of Dopants on Epitaxial Growth of Silicon Nanowires

Abstract

We investigated the effects of dopants on epitaxial growth of Si NWs, with an emphasis on synthesizing vertical epitaxial Si NW arrays on Si (111) substrates. We found that addition of boron with a B:Si feed-in atomic ratio greater than 1:1000 improved the percentage of Si NWs grown along the vertical <111> direction to more than 90%, compared to 38% for i-Si NWs. We also demonstrated a stemmed growth strategy and achieved a 93% percentage of i-Si NW segments along the vertical <111> direction on Si substrates. In summary, our study opens up potential for using chemical synthesized vertical Si NW arrays integrated on Si substrates for large-scale applications.

Polymeric nanocomposites reinforced with nanowires: Opening doors to future applications

“…The sheet resistance of composite film was slightly increased (<5.3%) during 200 cycles of tensile and compression folding. Stubhan et al 49 fabricated AgNW/buffer layer electrode with a photoactive layer of poly(3hexylthiophene) (P3HT) and [6,6]-phenyl-C61 butyric acid methyl ester (PCBM). The material was proposed as a replacement of commonly used ITO electrode material.…”

“…Note that PLEDs with higher than 100% efficiency are demanded for future LED device applications. Voc: open-circuit voltage; Jsc: short-circuit current density; FF: fill factor; PCE: power conversion efficiency; PCDTBT: poly(N-9-hepta-decanyl-2,7-carbazole)-alt-5,5-(4,7-di-2-thienyl-2,1,3-benzothiadiazole); PC71BM: [6,6]-phenyl C71 butyric acid methyl ester; rGO: reduced graphene oxide; AgNW: silver nanowire; ITO: indium tin oxide.…”

“…The theoretical percolation threshold for dispersed nanowires with a 1000:1 aspect ratio is as low as 0.01–0.05 vol.%. 6 Polymer-based nanowires have been intensively studied as nanofiller additives to enhance the physical characteristics of polymer matrices. 7,8 Among polymers, conducting polymers as well as non-conducting thermoplastic polymers have been used to process one-dimensional nanowire structures.…”