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• W4214759966 abstract "Flexible, substrate-free nanowire (NW) devices are desirable to overcome the extremely challenging task of integrating III-V or III-N semiconductor devices such as LEDs and lasers on a range of optoelectronic circuits or biochips. In this work, we report the demonstration of core-shell p-InP/n-ZnO heterojunction NW array LEDs. The emission from the devices consists of three peaks at room temperature due to conduction band-to-heavy hole band transition, conduction band-to-light hole band transition and recombination at the substrate. At 78 K, an additional peak due to Zn acceptor levels is observed, whereas the peak due to the conduction band-to-light hole band transition quenches. Flexible LEDs are then fabricated by embedding the NW arrays in SU-8 to enable subsequent lift-off from the substrate. Compared with the original on-substrate LED device, broader, red-shifted and multiple peaks are observed from the flexible devices, which may be due to non-uniform strain related effects in the NWs caused by the SU-8 film. A slightly higher series resistance as compared to the on-substrate device and significant Joule heating suggest that good heatsinking is required for these flexible devices. Nevertheless, our study paves a promising way towards flexible and low power LEDs." @default.
• W4214759966 created "2022-03-02" @default.
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• W4214759966 date "2022-01-01" @default.
• W4214759966 modified "2023-10-01" @default.
• W4214759966 title "Flexible InP–ZnO nanowire heterojunction light emitting diodes" @default.
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• W4214759966 doi "https://doi.org/10.1039/d1nh00535a" @default.
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• W4214759966 hasPublicationYear "2022" @default.
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