Your browser doesn't support javascript.
loading
Efficiency of True-Green Light Emitting Diodes: Non-Uniformity and Temperature Effects.
Titkov, Ilya E; Karpov, Sergey Yu; Yadav, Amit; Mamedov, Denis; Zerova, Vera L; Rafailov, Edik.
Afiliación
  • Titkov IE; Ostendo Technologies Inc., 6185 Paseo del Norte, Carlsbad, CA 92011, USA. ilya.titkov@ostendo.com.
  • Karpov SY; Optoelectronics and Biomedical Photonics Group, Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, UK. ilya.titkov@ostendo.com.
  • Yadav A; STR Group-Soft-Impact, Ltd., P.O. Box 83, 27 Engels Ave., 194156 Saint-Petersburg, Russia. sergey.karpov@str-soft.com.
  • Mamedov D; Optoelectronics and Biomedical Photonics Group, Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, UK. a.yadav1@aston.ac.uk.
  • Zerova VL; Ostendo Technologies Inc., 6185 Paseo del Norte, Carlsbad, CA 92011, USA. Denis.mamedov@ostendo.com.
  • Rafailov E; Optoelectronics and Biomedical Photonics Group, Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, UK. vzerova@gmail.com.
Materials (Basel) ; 10(11)2017 Nov 18.
Article en En | MEDLINE | ID: mdl-29156543
External quantum efficiency of industrial-grade green InGaN light-emitting diodes (LEDs) has been measured in a wide range of operating currents at various temperatures from 13 K to 300 K. Unlike blue LEDs, the efficiency as a function of current is found to have a multi-peak character, which could not be fitted by a simple ABC-model. This observation correlated with splitting of LED emission spectra into two peaks at certain currents. The characterization data are interpreted in terms of non-uniformity of the LED active region, which is tentatively attributed to extended defects like V-pits. We suggest a new approach to evaluation of temperature-dependent light extraction and internal quantum efficiencies taking into account the active region non-uniformity. As a result, the temperature dependence of light extraction and internal quantum efficiencies have been evaluated in the temperature range mentioned above and compared with those of blue LEDs.
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Materials (Basel) Año: 2017 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Materials (Basel) Año: 2017 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Suiza