GaN micro-light-emitting diodes;
two-dimensional materials;
graphene;
field effect transistors;
monolithic integration;
HIGH BREAKDOWN VOLTAGE;
HEMTS;
D O I:
10.3390/ma12030428
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Micro-light-emitting diodes (micro-LEDs) are the key to next-generation display technology. However, since the driving circuits are typically composed of Si devices, numerous micro-LED pixels must be transferred from their GaN substrate to bond with the Si field-effect transistors (FETs). This process is called massive transfer, which is arguably the largest obstacle preventing the commercialization of micro-LEDs. We combined GaN devices with emerging graphene transistors and for the first-time designed, fabricated, and measured a monolithic integrated device composed of a GaN micro-LED and a graphene FET connected in series. The p-electrode of the micro-LED was connected to the source of the driving transistor. The FET was used to tune the work current in the micro-LED. Meanwhile, the transparent electrode of the micro-LED was also made of graphene. The operation of the device was demonstrated in room temperature conditions. This research opens the gateway to a new field where other two-dimensional (2D) materials can be used as FET channel materials to further improve transfer properties. The 2D materials can in principle be grown directly onto GaN, which is reproducible and scalable. Also, considering the outstanding properties and versatility of 2D materials, it is possible to envision fully transparent micro-LED displays with transfer-free active matrices (AM), alongside an efficient thermal management solution.
机构:
Hong Kong Beida Jade Bird Display Ltd, Hong Kong, Hong Kong, Peoples R ChinaHong Kong Beida Jade Bird Display Ltd, Hong Kong, Hong Kong, Peoples R China
Zhang, Lei
Ou, Fang
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机构:
Hong Kong Beida Jade Bird Display Ltd, Hong Kong, Hong Kong, Peoples R ChinaHong Kong Beida Jade Bird Display Ltd, Hong Kong, Hong Kong, Peoples R China
Ou, Fang
Chong, Wing Cheung
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机构:
Hong Kong Beida Jade Bird Display Ltd, R&D, Hong Kong, Hong Kong, Peoples R ChinaHong Kong Beida Jade Bird Display Ltd, Hong Kong, Hong Kong, Peoples R China
Chong, Wing Cheung
Chen, Yijing
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机构:
Hong Kong Beida Jade Bird Display Ltd, Hong Kong, Hong Kong, Peoples R ChinaHong Kong Beida Jade Bird Display Ltd, Hong Kong, Hong Kong, Peoples R China
Chen, Yijing
Li, Qiming
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机构:
Hong Kong Beida Jade Bird Display Ltd, Hong Kong, Hong Kong, Peoples R ChinaHong Kong Beida Jade Bird Display Ltd, Hong Kong, Hong Kong, Peoples R China