Masayuki Senoh coauthored work on blue light-emitting diodes using an indium gallium nitride/aluminium gallium nitride double heterostructure. The devices emitted near nm and reached external quantum efficiency at mA electric current.[ref]
Candela-class high-brightness InGaN⁄AlGaN double-heterostructure blue-light-emitting diodes by Shuji Nakamura and others. Applied Physics Letters 64 (1994), pp. 1687–1689: author list, abstract and emission/output measurements; primary article reproduced in the USPTO record.
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