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genhunter

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超级老快: 金币+60, 翻译EPI+1, ★★★很有帮助 2016-09-09 13:03:12

Under excitation with 365 nm near ultraviolet light, there is an increased blue-green light emission from Eu2+ at 400-550nm wavelengths, which is due to Eu3+ reduction by Al into Eu2+. As the content of Al increases, the absorption spectrum had noticeable changes. At lower Al contents, the absorption spectrum was mainly at 280 nm as a result from charge migration. Increased Al content led to another new peak absorption around 320-400 nm, which increased proportionally as the Eu2+ amount increases. We assign this to .Eu2+：4f65d→4f7 allowable dipole transition.

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离成功还差一点

2楼2016-09-09 12:45:44

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