Department of Mechanical Engineering,Lamar University,Beaumont,TX 77710,USA;
State Key Laboratory of Solid State Lighting,Beijing 100083,China;
Department of Mechanical Engineering,Lamar University,Beaumont,TX 77710,USA;
School of Materials Science and Engineering,Georgia Tech,Atlanta,GA 30332-0245,USA;
Department of Mechanical Engineering,Lamar University,Beaumont,TX 77710,USA;
Delft University of Technology,Delft 2600 AA,the Netherlands;
Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China;