Thin soft new semiconductor materials can be used in the field of photovoltaic devices, etc

Nature soft, thickness of only a few nanometers, good optical performance & hellip; … 3, reporters learned from the nanjing university of technology, the school professor wang group was a high quality of ultra-thin two-dimensional iodide crystal, and through it realized with two-dimensional regulation of optical properties of transition metal sulfide material for manufacturing solar cells, photodetectors provides a new way of thinking. The results published in the latest issue of journal of international journal of advanced materials.

　　“ For the first time, we lead the ultra-thin iodide preparation nanometer, professional term called & lsquo; The thickness of the atomic wide bandgap two-dimensional PbI2 crystal & rsquo; , is a kind of ultra-thin semiconductor material, only a few nanometers thick. ” Paper first author, nanjing university of technology PhD research sun says, they adopted the solution method to synthesis, the method of equipment requirements is low, has the advantages of simple, rapid, efficient, able to meet the demand of large area and high yield of material preparation. Synthesis of iodide lead with regular triangular or hexagonal nanometer sheet shape, average size 6 microns, the surface is smooth level off, the optical performance is good.

researchers lead iodide this ultrathin nano piece combined with two-dimensional transition metal sulfides, artificial design, stack them together, for different types of heterojunction, since there are different level arrangement, therefore iodide can lead to different two-dimensional optical manifestation of transition metal sulfides have different effects. The band structure can effectively improve the luminous efficiency, conducive to making such as light-emitting diodes (leds), laser devices, in display and illumination applications, and can be used in the field of photoelectric detector, photovoltaic devices, etc.

this achievement has realized the ultra-thin iodide lead to two-dimensional optical properties of transition metal sulfide material control, and traditional silicon-based materials as the main body of the optoelectronic devices, compared the results with the flexible, micro-nano characteristics, thus can be applied in the preparation of flexibility, can be integrated optoelectronic devices based on lead iodide of nanometer semiconductor heterojunction two-dimensional, in the field of micro-nano photoelectric device, can be integrated with broad application prospects, and to make solar cells, photodetectors, etc. , also provides a new way of thinking.

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