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By employing lithium and nitrogen codoping method, p‐type zinc oxide (ZnO) films have been prepared, and the p‐type conduction can maintain for 207 days. ZnO p–n junctions have been constructed based on the p‐type ZnO. Under the drive of continuous current, obvious emission has been observed from the p–n junctions, and the ZnO p–n junction light‐emitting devices (LEDs) can still work after placing...
This paper aims at building up a set of scientific, suitable for Chinese situation project evaluation criterion system on Websites of e-government procurement of China so as to provide a reference standard and uniform rule for the construction of future Websites of e-government procurement of China. This paper defines the objectives of the Websites of e-government procurement of China, designs the...
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