Nitride Semiconductors Co., Ltd.

Naoki Wada

Shiro Sakai

Hisao Sato

Masahiro Kimura

A light-emitting apparatus employing a GaN-based semiconductor. The light-emitting apparatus comprises an n-type clad layer (); an active layer () including an n-type first barrier layer (), well layers (), and second barrier layers (); a p-type block layer (); and a p-type clad layer (). By setting the band gap energy Egb of the p-type block layer (), the band gap energy Egof the second barrier layers (), the band gap energy Egof the first barrier layer (), and the band gap energy Egc of the n-type and the p-type clad layers such that the relationship Egb&#x3e;Eg&#x3e;Eg&#x2267;Egc is satisfied; the carriers can be efficiently confined; and the intensity of the light emission can be increased.

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Naruto, Japan

Naoki Wada