TY - JOUR
T1 - Growth of PbS nanopyramidal particulate films for potential applications in quantum-dot photovoltaics and nanoantennas
AU - Hawaldar, Ranjit
AU - Mulik, Uttamrao
AU - Patil, Kashinath
AU - Pasricha, Renu
AU - Sathaye, Shivaram
AU - Lewis, Aaron
AU - Amalnerkar, Dinesh
PY - 2005/8/11
Y1 - 2005/8/11
N2 - We report a simple interfacial process called the liquid-liquid interface reaction technique (LLIRT) that leads to the formation of nanosized PbS particulate films with hitherto unreported pyramidal morphology. The resultant PbS films were characterized by transmission electron microscopy (TEM) with selected area electron diffraction (SAED), X-ray diffractometery (XRD), atomic force microscopy (AFM), near field scanning optical microscopy (NSOM) and UV-vis spectroscopy. The pyramidal morphology is speculated to originate from the preferred orientation of the 2 2 0 plane of cubic PbS. Our nanopyramidal PbS particulate films display remarkably sharp excitonic peak centered around 656 nm that accounts for a band gap of 1.8 eV suggesting, in turn, their potential application in QD photovoltaics. Interestingly, the feasibility of such nanopyramids to potentially act as nanoantennas (as revealed by the NSOM) is also suggested.
AB - We report a simple interfacial process called the liquid-liquid interface reaction technique (LLIRT) that leads to the formation of nanosized PbS particulate films with hitherto unreported pyramidal morphology. The resultant PbS films were characterized by transmission electron microscopy (TEM) with selected area electron diffraction (SAED), X-ray diffractometery (XRD), atomic force microscopy (AFM), near field scanning optical microscopy (NSOM) and UV-vis spectroscopy. The pyramidal morphology is speculated to originate from the preferred orientation of the 2 2 0 plane of cubic PbS. Our nanopyramidal PbS particulate films display remarkably sharp excitonic peak centered around 656 nm that accounts for a band gap of 1.8 eV suggesting, in turn, their potential application in QD photovoltaics. Interestingly, the feasibility of such nanopyramids to potentially act as nanoantennas (as revealed by the NSOM) is also suggested.
KW - A. Nanostructures
KW - B. Chemical synthesis
KW - C. Atomic force microscopy
KW - C. Electron microscopy
KW - D. Optical properties
UR - http://www.scopus.com/inward/record.url?scp=21944452713&partnerID=8YFLogxK
U2 - 10.1016/j.materresbull.2005.04.018
DO - 10.1016/j.materresbull.2005.04.018
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AN - SCOPUS:21944452713
SN - 0025-5408
VL - 40
SP - 1353
EP - 1360
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 8
ER -