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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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95 records · Page 6
All sourcesNASA NTRSDOE OSTI
DOE OSTI2022

Hybrid organic light emitting device

An OLED device comprises an anode and a cathode, and at least one graded emissive layer disposed between the anode and the cathode, the graded emissive layer comprising first and second materials, wherein a concentration of the first material increases continuously from an anode side of the graded emissive layer to a cathode side of the graded emissive layer, and a concentration of the second material decreases continuously from the anode side of the graded emissive layer to the cathode side of the graded emissive layer. An OLED device comprising a graded emissive layer and a hybrid white OLED device are also described.

Forrest, Stephen R.↗
DOE OSTI2022

Systems and methods for quantum optical device authentication

Quantum optical device authentication technologies are described herein. A first device includes an optical transmitter transmits a plurality of pulses to an optical receiver included on a second device. The optical pulses each have one of two non-orthogonal optical states. The optical receiver measures each of the pulses and the second device records a measured value of the optical state of each pulse. Subsequently, the second device transmits the measured values of the optical states of the pulses to the first device. The first device outputs an indication of whether the second device is authenticated based upon the measured values received from the second device and the optical states of the pulses transmitted by the optical transmitter.

Soh, Daniel Beom Soo↗
DOE OSTI2024

OLED with hybrid emissive layer

A hybrid emissive layer and OLED incorporating the same are provided. The hybrid emissive layer includes a first material having a triplet state energy level T1 H and a singlet state energy level S1 H , a second material having a triplet state energy level T1 F and a singlet state energy level S1 F ; and a third material having a triplet state energy level T1 P and a single state energy level S1 P , where T1 F $\geqslant$ T1 H ; S1 F $\leqslant$ S1 H ; and T1 P < T1 H

Thompson, Mark E.↗
DOE OSTI2024

Systems and methods for resolving a number of incident RF-range photons

A photon-number-resolving detector comprises a detection element, an ohmmeter, and a hardware logic component. The detection element can be formed from a Weyl or Dirac semimetal. Electrons of the detection element are characterized by a surface state that exhibits a Dirac cone and a bulk superconducting state that exhibits a bandgap. When photons having energies less than the bandgap of the bulk superconducting state impinges on the detection element, the photons can be absorbed by electrons of the detection element that are characterized by the surface state. The ohmmeter outputs resistance data indicative of an electrical resistance of the detection element while the photons impinge on the detection element. The hardware logic component can determine, based upon the resistance data, a number of the photons that are absorbed by the surface state electrons of the detection element.

Soh, Daniel Beom Soo↗