The nano wires, with diameters as small as 200 nano meters (billionths of a meter) and a blend of materials that has also proven effective in next-generation solar cell designs, were shown to produce very bright, stable laser light. Researchers say the excellent performance of these tiny lasers is promising for the field of optoelectronics, which is focused on combining electronics and light to transmit data, among other applications.
Light can carry far more data, far more rapidly than standard electronics--a single fiber in a fiber-optic cable, measuring less than a hair's width in diameter, can carry tens of thousands of telephone conversations at once, for example. And miniaturizing lasers to the nano scale could further revolutionize computing by bringing light-speed data transmission to desktop and ultimately handheld computing devices.
The research team developed a simple chemical-dipping solution process to produce a self-assembled blend of nano scale crystals, plates and wires composed of cesium, lead and bromine (with the chemical formula: CsPbBr3). The same chemical blend, with a molecular architecture composed of cube-like crystal structures, has also proven effective in an emerging wave of new designs for high-efficiency solar cells.
In this latest work, the research team discovered how to produce nano wires by dipping a thin lead-containing film into a methanol solution containing cesium, bromine and chlorine heated to about 122 degrees Fahrenheit. A mix of cesium lead bromide crystalline structures formed, including nano wires with a diameter from 200 to 2,300 nano meters (0.2 to 2.3 microns) and a length ranging from 2 to 40 microns.
The nanowires' crystalline structure is a lot like salt, which does make them susceptible to damage from moisture in the air, Yang said.
Yang said, "This field is rapidly evolving. We just jumped into this field only 12 months ago, and these lasers are already amazing, bright emitters. It's just so exciting."
Light can carry far more data, far more rapidly than standard electronics--a single fiber in a fiber-optic cable, measuring less than a hair's width in diameter, can carry tens of thousands of telephone conversations at once, for example. And miniaturizing lasers to the nano scale could further revolutionize computing by bringing light-speed data transmission to desktop and ultimately handheld computing devices.
The research team developed a simple chemical-dipping solution process to produce a self-assembled blend of nano scale crystals, plates and wires composed of cesium, lead and bromine (with the chemical formula: CsPbBr3). The same chemical blend, with a molecular architecture composed of cube-like crystal structures, has also proven effective in an emerging wave of new designs for high-efficiency solar cells.
In this latest work, the research team discovered how to produce nano wires by dipping a thin lead-containing film into a methanol solution containing cesium, bromine and chlorine heated to about 122 degrees Fahrenheit. A mix of cesium lead bromide crystalline structures formed, including nano wires with a diameter from 200 to 2,300 nano meters (0.2 to 2.3 microns) and a length ranging from 2 to 40 microns.
The nanowires' crystalline structure is a lot like salt, which does make them susceptible to damage from moisture in the air, Yang said.
Yang said, "This field is rapidly evolving. We just jumped into this field only 12 months ago, and these lasers are already amazing, bright emitters. It's just so exciting."
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