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application of zinc sulfide powder

2018-11-23 11:29 View:
Application of nano zinc sulfide
2 .1 Application in photovoltaic materials
ZnS is an electron excess intrinsic semiconducting with a band gap of 368 kJ/mol Body, with piezoelectric and pyroelectric properties, is an excellent luminescent substrate, however high
Pure, stoichiometrically formed ZnS has no measurable photoluminescence Light. 1994, Bhargava
First reported in semiconductor nanocrystalline materials a certain amount of Mn is added to the ZnS 2 +, can change the electronic transition in the illuminant The path thus reduces the loss of non-radiative electrons. Luminescence test shows that its quantum effect the rate is greatly improved, and the decay time is shortened by 5 orders of magnitude, making ZnS : Mn
2+ hairThe light body has a fast response and low threshold optical properties. research showsFor optoelectronic materials based on nano zinc sulfide, it can be doped and controlled
By means of its particle size and other means to modulate its luminous frequency, luminous efficiency, etc. Doping at the sub-level is expected to be developed into a blue light-emitting device to achieve ultra-high scores. Resolution, large screen display. Guan Yafei, etc.

Method of electron beam evaporation
A conventional double insulating layer of ZnS:Tm thin film electroluminescent device was prepared. Chen Songyan, et al Preparation of nano-vulcanization on silicon substrates by double-boat thermal evaporation Zinc electroluminescent film. Hansoo Kim Waiting for sulfur to grow on carbon nanotubes Zinc-doped quantum dots and zinc sulfide nanorods, the results show that in zinc sulfide quantum dots The heterojunction formed between the zinc sulfide nanorods can be used for nanometer size. The development of optoelectronic devices.

2 .2 Application in infrared optical materials
Nano ZnS can also be used in infrared optical materials. At 3 to 5 μm And 8 ~ 12 μm band, nano ZnS has high infrared transmittance and excellent Good light, mechanical, thermal comprehensive performance, is the best aircraft dual-band red External observation window and hood material. Long-wave infrared used on refined weapons Among the materials, hot-pressed polycrystalline zinc sulfide crystal nano-powder (HP-ZnS) is the preferred material. Material. Li Yubin, etc. 6 mm HP- prepared by vacuum hot pressing The average infrared transmittance of ZnS polycrystals in the 8-12 μm band is 66.7 %. Yan Zewu, et al. also used chemical vapor deposition in the reaction chamber pressure 500 Between 1 000 Pa and a deposition temperature between 550 and 650 °C
ZnS crystal, the infrared transmittance of the obtained crystal (3 ~ 5 μm and 8 ~ 12 μm Band) is above 70%.

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