| 摘要 |
An ultraviolet light emitting device includes a first conductive semiconductor layer; an active layer under the first conductive semiconductor layer; a first reflective layer under the active layer; and a second conductive semiconductor layer under the first reflective layer. The first reflective layer comprises a plurality of compound semiconductor layers. The compound semiconductor layer comprises at least two semiconductor materials. The contents of the at least two semiconductor materials are different from each other. |
