Light emitting device

A light emitting device comprising:

• a first semiconductor layer having a first conductive dopant;
• an active layer on the first semiconductor layer;
• an electron blocking layer on the active layer;
• a carrier injection layer between the active layer and the electron blocking layer;
• and
• a second semiconductor layer having a second conductive dopant and disposed on the electron blocking layer,
• wherein the carrier injection layer includes:
• a third semiconductor layer having the second conductive dopant;
• a fourth semiconductor layer, which is undoped, on the third semiconductor layer;
• and
• a fifth semiconductor layer, which comprises the second conductive dopant, on the fourth semiconductor layer.