An Apparatus for Measuring Quantum Efficiency in Electroluminescent Devices over a Wide Current Range

1 June 1972

journal article
research article
Published by AIP Publishing in Review of Scientific Instruments

Vol. 43 (6), 876-878
https://doi.org/10.1063/1.1685794

Abstract

An apparatus is described which measuresquantum efficiency (or power or luminescent efficiency) in electro‐luminescent devices. The device test current is pulsed and may be varied over a 100–1 dynamic range. Efficiency measurements are self‐normalizing and direct‐reading at any test current. Heating effects are minimized by maintaining a low (1 mA) time‐averaged LED current. Luminescence is detected using a highly efficient, small volume optical cavity which permits measurements of quantum efficiencies as low as 0.0001% (10−6).

Keywords

This publication has 3 references indexed in Scilit:

View into the Integrating Sphere Through the Observation Window
Applied Optics, 1971
Efficient green electroluminescent junctions in GaP
Solid-State Electronics, 1971
Saturation of Zn-O complexes in GaP diodes
Proceedings of the IEEE, 1969

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