Journal
CHEMISTRY OF MATERIALS
Volume 23, Issue 5, Pages 1299-1305Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm103340v
Keywords
chalcogenide; Cu4Bi4S9; nanobelts; solvothermal; surface photovoltage; photovoltaics
Funding
- National Natural Science Foundation of China [90923014, 10974050, 60796078, 20903038, 10774174]
- 973 National Key Basic Research Program of China [2007CB310500]
- Hunan Provincial Natural Science Fund [09JJ1009]
- Aid Program for Science and Technology Innovative Research Team in Higher Educational Instituions of Hunan Province
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Cu-based ternary chalcogenides have received great interest as low-cost alternatives to conventional photovoltaic materials.. In this work, a large quantity of single-crystalline, orthorhombic phase Cu4Bi4S9 nanoribbons are fabricated using a facile solvothermal method. The growth of the Cu4Bi4S9 nanoribbons is revealed to be a layer-by-layer stacking of Cu4Bi4S9 thin slabs via dodecylamine (DDA) linker, in which the number of stacking layers, and, subsequently, the width-to-thickness ratio, depends on the DDA concentration. Optical investigations show that the as-prepared Cu4Bi4S9 nanoribbons have a narrow bandgap of E-g = 1.14 eV and enhanced surface photovoltage response in the entire visible wavelength range. It is indicated that these Cu4Bi4S9 nanoribbons have potential application in photodetectors, solar cells, or other optoelectronic devices.
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